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Deleted. 15:54:11 388890 DEBUG DownloadPDFJob - URL: https://onlinelibrary.wiley.com/doi/pdf/10.1002/smll.73910 Download location: /opt/downloadPDF/chemwiki_pubstore/12c4f805b6330e7ee240234fd52bcf7f.pdf Using chrome webdriver logfile: /tmp/chromedriver.log Using chrome webdriver: /opt/downloadPDF/chromedriver Using chrome binary: /usr/bin/google-chrome Initializing chrome driver... Jun 08, 2026 3:54:03 PM org.openqa.selenium.devtools.CdpVersionFinder findNearestMatch WARNING: Unable to find an exact match for CDP version 147, returning the closest version; found: 143; Please update to a Selenium version that supports CDP version 147 DONE. Getting initial URL: https://onlinelibrary.wiley.com/doi/pdf/10.1002/smll.73910 DONE. Final URL after redirect: https://onlinelibrary.wiley.com/doi/pdf/10.1002/smll.73910 An error occurred: Failed to download PDF. HTTP status: 403 java.lang.RuntimeException: Failed to download PDF. HTTP status: 403 at com.diqa.downloader.Main.downloadPdf(Main.java:186) at com.diqa.downloader.Main.main(Main.java:127) 15:55:02 389112 DEBUG DownloadPDFJob - Loading from URL: https://onlinelibrary.wiley.com/doi/pdf/10.1002/smll.73910 15:55:02 389112 DownloadPDFJob - $wgChemChromeDriverLog is not set 15:55:11 389112 DEBUG DownloadPDFJob - Not a PDF file: /opt/downloadPDF/chemwiki_pubstore/12c4f805b6330e7ee240234fd52bcf7f.pdf. Deleted. 15:55:11 389112 DEBUG DownloadPDFJob - URL: https://onlinelibrary.wiley.com/doi/pdf/10.1002/smll.73910 Download location: /opt/downloadPDF/chemwiki_pubstore/12c4f805b6330e7ee240234fd52bcf7f.pdf Using chrome webdriver logfile: /tmp/chromedriver.log Using chrome webdriver: /opt/downloadPDF/chromedriver Using chrome binary: /usr/bin/google-chrome Initializing chrome driver... Jun 08, 2026 3:55:03 PM org.openqa.selenium.devtools.CdpVersionFinder findNearestMatch WARNING: Unable to find an exact match for CDP version 147, returning the closest version; found: 143; Please update to a Selenium version that supports CDP version 147 DONE. Getting initial URL: https://onlinelibrary.wiley.com/doi/pdf/10.1002/smll.73910 DONE. Final URL after redirect: https://onlinelibrary.wiley.com/doi/pdf/10.1002/smll.73910 An error occurred: Failed to download PDF. HTTP status: 403 java.lang.RuntimeException: Failed to download PDF. HTTP status: 403 at com.diqa.downloader.Main.downloadPdf(Main.java:186) at com.diqa.downloader.Main.main(Main.java:127) 15:58:02 389371 DEBUG DownloadPDFJob - Loading from URL: https://onlinelibrary.wiley.com/doi/pdf/10.1002/anie.1083625 15:58:02 389371 DownloadPDFJob - $wgChemChromeDriverLog is not set 15:58:12 389371 DEBUG DownloadPDFJob - Not a PDF file: /opt/downloadPDF/chemwiki_pubstore/cacce74f7430676a43171f706641ed1a.pdf. 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Jun 08, 2026 4:03:03 PM org.openqa.selenium.devtools.CdpVersionFinder findNearestMatch WARNING: Unable to find an exact match for CDP version 147, returning the closest version; found: 143; Please update to a Selenium version that supports CDP version 147 DONE. Getting initial URL: https://api.elsevier.com/content/article/PII:S0021951726000072?httpAccept=text/xml DONE. Final URL after redirect: https://api.elsevier.com/content/article/PII:S0021951726000072?httpAccept=text/xml Downloaded 2084 bytes to: /opt/downloadPDF/chemwiki_pubstore/f866f391360acc0a84015f0b545ea3cc.pdf PDF downloaded successfully to: /opt/downloadPDF/chemwiki_pubstore/f866f391360acc0a84015f0b545ea3cc.pdf 16:19:41 390242 WARN PublicationImportSpecialpage - User does not have email set or cannot send emails: ChemUser 16:20:02 390312 PublicationImportJob - prompt for AI: [SYSTEM-LIKE INSTRUCTIONS] You are a highly conservative scientific information extractor and formatter. Your primary goal is factual fidelity to the attached article. You must extract only what is explicitly supported by the article. Never guess, reconstruct, or “complete” missing scientific data from general chemistry knowledge. When a value is unclear, ambiguous, inconsistent, or not explicitly stated, output "not reported". Core extraction policy: - Correctness is more important than completeness. - Unit normalization must be exact. - Never confuse catalyst, photosensitizer, sacrificial electron donor, solvent, additive, proton source, irradiation wavelength, or product metric. - Values should only be converted when the article provides a clear and scientifically reliable basis for conversion. - Never infer absolute concentrations from mol% unless the absolute concentration is explicitly stated. - Never infer TON CO from yield, selectivity, graph shape, or discussion text unless the TON CO value itself is explicitly reported or unambiguously readable. - Never replace a wavelength range with a single wavelength. - Never merge data across figures, tables, or sections unless the article clearly shows that they refer to the same experiment. - Never include bibliographic metadata in the output. Formatting policy: - Follow the requested section titles exactly. - Output only the requested final formatted content. - Use "not reported" for unsupported entries. - Do not mention uncertainty analysis, self-checking, or extraction workflow in the final answer. Before finalizing, silently verify: - catalyst concentration is in µM - photosensitizer concentration is in mM - electron donor concentration is in M - excitation wavelength is in nm - TON CO refers only to CO - no unsupported claim has been added - no bibliographic metadata is present [TASK] Read the attached scientific article and convert it into a structured educational chemistry wiki entry about a molecular photocatalytic CO2 reduction system. TASK Produce a scientifically accurate, teaching-oriented summary in MediaWiki format for advanced undergraduate chemistry students. Focus strictly on the chemistry, mechanism, photocatalytic setup, components, and reported results. CONTENT RESTRICTIONS - Use only information explicitly supported by the attached article. - Do NOT include author names, affiliations, journal name, year, DOI, citation labels, references, page numbers, or any publication metadata. - Do NOT speculate. - Do NOT fill missing values from chemical intuition or standard literature practice. - Whenever a requested value is missing, ambiguous, or not explicitly reported, write: "not reported". STYLE REQUIREMENTS - Use proper MediaWiki markup. - Use accessible but precise scientific language. - Keep the explanation educational, technically correct, and chemically specific. - Avoid unnecessary jargon, but do not oversimplify. - Distinguish clearly between established experimental observations and proposed mechanistic interpretation. OUTPUT REQUIREMENTS - Return only the final MediaWiki-formatted entry. - Use exactly the section headings below, in exactly the same order. - Do not add extra sections. - The final section, "Investigation", must contain CSV data inside a plain fenced code block. Use exactly this structure: == Abstract Summary == Provide a concise overview of the scientific goal, the photocatalytic system, and the main findings. State what was converted, what kind of photocatalytic system was used, and what the main outcome was. == Advances and Special Progress == Explain the key scientific advances compared with earlier molecular photocatalytic CO2 reduction systems. Focus on scientifically meaningful progress such as: - higher activity, - improved CO selectivity, - improved compatibility with water or mixed solvents, - unusual catalyst design, - mechanistic insight, - improved durability, - use of earth-abundant components, - unusual electron-transfer design, - better coupling between catalyst and photosensitizer. Only mention advances that are supported by the article itself. == Additional Remarks == Provide important contextual remarks relevant to the chemistry and significance of the work. Examples may include: - sustainability relevance of CO2-to-CO photoreduction, - strengths and limitations of sacrificial photochemical systems, - dependence on noble-metal photosensitizers, - solvent limitations, - water tolerance, - competition with H2 evolution, - catalyst decomposition, - low long-term durability, - mechanistic elegance versus practical limitations. Keep this section balanced, factual, and chemically relevant. == Content of the Published Article in Detail == Write a clear, teaching-oriented explanation of the scientific content of the article. Include, where supported by the article: - the molecular components of the system, - how the photocatalytic experiment is set up, - what happens after light absorption by the photosensitizer, - whether reductive or oxidative quenching is proposed, - how the sacrificial electron donor participates, - how electrons are transferred to the catalyst, - what reduced catalyst states are proposed or observed, - how CO2 activation and reduction are described, - how CO is formed and released, - whether proton transfer is involved, - what side products are observed or suppressed, - what control experiments or spectroscopic/electrochemical studies support the mechanism. Mechanistic explanation rules: - Explain the mechanism in words. - Be chemically accurate. - Distinguish proposed intermediates from directly observed intermediates. - Use cautious wording where appropriate, such as "the article proposes" or "the data support". - Do not overstate mechanistic certainty. Possible supporting evidence may include: - Stern-Volmer quenching, - emission quenching, - transient absorption, - UV/Vis spectroscopy, - cyclic voltammetry, - spectroelectrochemistry, - control experiments omitting one component, - atmosphere controls, - product analysis, - catalyst comparison studies. == Catalyst == Describe the catalyst in a compact but chemically informative way. Include only details explicitly supported by the article, such as: - exact catalyst identity, - catalyst class, - metal center, - oxidation state if stated, - ligand family or coordination environment, - whether it is mononuclear, dinuclear, supramolecular, macrocyclic, polypyridyl, porphyrinic, or another named class, - whether it is molecular, immobilized, or heterogeneous, - catalytic role in CO2 reduction, - special redox or structural properties relevant to function, - selectivity-related features, - stability or decomposition issues relevant to performance. Do not invent structural details beyond what the article actually states or names. == Photosensitizer == Describe the photosensitizer in the same style. Include only details explicitly supported by the article, such as: - exact identity, - photosensitizer class, - light-harvesting role, - excited-state function, - whether it undergoes reductive or oxidative quenching, - relevant redox or photophysical properties if explicitly discussed, - why it is suitable in this system, - any stability or photobleaching issues if reported. If multiple photosensitizers are compared, identify the main one clearly and mention others only when relevant data are reported. == Investigation == Provide the core photocatalytic experiments as ONE fenced code block that starts with ```csv and ends with ```. The block must be plain CSV — no markdown table, no JSON, no text before or after it inside the block. The header row MUST be EXACTLY these columns, in this order: catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Extraction rules for the CSV: - One row per distinct experimental condition explicitly reported. Take the main photocatalytic performance table first, and add control / condition-variation rows when they are explicitly reported. Include EVERY distinct experiment — do not summarise or collapse rows. - Report numbers as bare values (no unit text) in exactly these units, converting only when the article gives a clear basis: cat conc = µM; PS conc = mM; e-D conc = M; H-D conc = M; Temperature = °C; λexc = nm; irr time = h; Turnover_frequency__* = h^-1; Quantum_yield__* = %. - catalyst, PS (photosensitizer), e-D (sacrificial electron donor), H-D (hydrogen/proton donor): use the identity (name or abbreviation) exactly as given in the article. Keep names consistent across rows. Never swap catalyst, photosensitizer, electron donor, hydrogen donor, solvent, or additive. - Turnover_number__X, Turnover_frequency__X, Quantum_yield__X are per product X (CO, CH4, H2, HCOOH). Put each product's value in its own column; never substitute CO yield, selectivity, total TON, or a value read from a graph. - For a solvent mixture, give solvent A/B/C and the ratio in solvent-ratio (for example 4:1). Keep additives out of the solvent fields. - Keep a wavelength range as a range (for example 420-650); a monochromatic source is a single nm value. - Leave a cell EMPTY only when the article does not state the value. Never invent, guess, reconstruct, or infer a value from general knowledge, figures, or discussion — every value must be explicitly supported by the article. - Do NOT use a value that appears only in the supporting information unless the main text also states it. - Never put a comma inside a cell (commas separate columns); use a space or a slash instead. - Do not add, remove, rename, or reorder columns. Before output, silently verify: section headings match exactly; no bibliographic metadata; units are as specified above; catalyst and photosensitizer are not swapped; no unsupported value was added; one row per distinct experiment. Return only the final MediaWiki entry with the CSV code block in the Investigation section. 16:20:04 390312 AIClient - Uploaded file: 1-s2.0-S0021951726000072-main_6a26cf7d580a3.pdf, id: file-YVPQVQ1WzMoHKzA6rLTLnP 16:20:04 390312 AIClient - Request to AI with prompt: '[SYSTEM-LIKE INSTRUCTIONS] You are a highly conservative scientific information extractor and formatter. Your primary goal is factual fidelity to the attached article. You must extract only what is explicitly supported by the article. Never guess, reconstruct, or “complete” missing scientific data from general chemistry knowledge. When a value is unclear, ambiguous, inconsistent, or not explicitly stated, output "not reported". Core extraction policy: - Correctness is more important than completeness. - Unit normalization must be exact. - Never confuse catalyst, photosensitizer, sacrificial electron donor, solvent, additive, proton source, irradiation wavelength, or product metric. - Values should only be converted when the article provides a clear and scientifically reliable basis for conversion. - Never infer absolute concentrations from mol% unless the absolute concentration is explicitly stated. - Never infer TON CO from yield, selectivity, graph shape, or discussion text unless the TON CO value itself is explicitly reported or unambiguously readable. - Never replace a wavelength range with a single wavelength. - Never merge data across figures, tables, or sections unless the article clearly shows that they refer to the same experiment. - Never include bibliographic metadata in the output. Formatting policy: - Follow the requested section titles exactly. - Output only the requested final formatted content. - Use "not reported" for unsupported entries. - Do not mention uncertainty analysis, self-checking, or extraction workflow in the final answer. Before finalizing, silently verify: - catalyst concentration is in µM - photosensitizer concentration is in mM - electron donor concentration is in M - excitation wavelength is in nm - TON CO refers only to CO - no unsupported claim has been added - no bibliographic metadata is present [TASK] Read the attached scientific article and convert it into a structured educational chemistry wiki entry about a molecular photocatalytic CO2 reduction system. TASK Produce a scientifically accurate, teaching-oriented summary in MediaWiki format for advanced undergraduate chemistry students. Focus strictly on the chemistry, mechanism, photocatalytic setup, components, and reported results. CONTENT RESTRICTIONS - Use only information explicitly supported by the attached article. - Do NOT include author names, affiliations, journal name, year, DOI, citation labels, references, page numbers, or any publication metadata. - Do NOT speculate. - Do NOT fill missing values from chemical intuition or standard literature practice. - Whenever a requested value is missing, ambiguous, or not explicitly reported, write: "not reported". STYLE REQUIREMENTS - Use proper MediaWiki markup. - Use accessible but precise scientific language. - Keep the explanation educational, technically correct, and chemically specific. - Avoid unnecessary jargon, but do not oversimplify. - Distinguish clearly between established experimental observations and proposed mechanistic interpretation. OUTPUT REQUIREMENTS - Return only the final MediaWiki-formatted entry. - Use exactly the section headings below, in exactly the same order. - Do not add extra sections. - The final section, "Investigation", must contain CSV data inside a plain fenced code block. Use exactly this structure: == Abstract Summary == Provide a concise overview of the scientific goal, the photocatalytic system, and the main findings. State what was converted, what kind of photocatalytic system was used, and what the main outcome was. == Advances and Special Progress == Explain the key scientific advances compared with earlier molecular photocatalytic CO2 reduction systems. Focus on scientifically meaningful progress such as: - higher activity, - improved CO selectivity, - improved compatibility with water or mixed solvents, - unusual catalyst design, - mechanistic insight, - improved durability, - use of earth-abundant components, - unusual electron-transfer design, - better coupling between catalyst and photosensitizer. Only mention advances that are supported by the article itself. == Additional Remarks == Provide important contextual remarks relevant to the chemistry and significance of the work. Examples may include: - sustainability relevance of CO2-to-CO photoreduction, - strengths and limitations of sacrificial photochemical systems, - dependence on noble-metal photosensitizers, - solvent limitations, - water tolerance, - competition with H2 evolution, - catalyst decomposition, - low long-term durability, - mechanistic elegance versus practical limitations. Keep this section balanced, factual, and chemically relevant. == Content of the Published Article in Detail == Write a clear, teaching-oriented explanation of the scientific content of the article. Include, where supported by the article: - the molecular components of the system, - how the photocatalytic experiment is set up, - what happens after light absorption by the photosensitizer, - whether reductive or oxidative quenching is proposed, - how the sacrificial electron donor participates, - how electrons are transferred to the catalyst, - what reduced catalyst states are proposed or observed, - how CO2 activation and reduction are described, - how CO is formed and released, - whether proton transfer is involved, - what side products are observed or suppressed, - what control experiments or spectroscopic/electrochemical studies support the mechanism. Mechanistic explanation rules: - Explain the mechanism in words. - Be chemically accurate. - Distinguish proposed intermediates from directly observed intermediates. - Use cautious wording where appropriate, such as "the article proposes" or "the data support". - Do not overstate mechanistic certainty. Possible supporting evidence may include: - Stern-Volmer quenching, - emission quenching, - transient absorption, - UV/Vis spectroscopy, - cyclic voltammetry, - spectroelectrochemistry, - control experiments omitting one component, - atmosphere controls, - product analysis, - catalyst comparison studies. == Catalyst == Describe the catalyst in a compact but chemically informative way. Include only details explicitly supported by the article, such as: - exact catalyst identity, - catalyst class, - metal center, - oxidation state if stated, - ligand family or coordination environment, - whether it is mononuclear, dinuclear, supramolecular, macrocyclic, polypyridyl, porphyrinic, or another named class, - whether it is molecular, immobilized, or heterogeneous, - catalytic role in CO2 reduction, - special redox or structural properties relevant to function, - selectivity-related features, - stability or decomposition issues relevant to performance. Do not invent structural details beyond what the article actually states or names. == Photosensitizer == Describe the photosensitizer in the same style. Include only details explicitly supported by the article, such as: - exact identity, - photosensitizer class, - light-harvesting role, - excited-state function, - whether it undergoes reductive or oxidative quenching, - relevant redox or photophysical properties if explicitly discussed, - why it is suitable in this system, - any stability or photobleaching issues if reported. If multiple photosensitizers are compared, identify the main one clearly and mention others only when relevant data are reported. == Investigation == Provide the core photocatalytic experiments as ONE fenced code block that starts with ```csv and ends with ```. The block must be plain CSV — no markdown table, no JSON, no text before or after it inside the block. The header row MUST be EXACTLY these columns, in this order: catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Extraction rules for the CSV: - One row per distinct experimental condition explicitly reported. Take the main photocatalytic performance table first, and add control / condition-variation rows when they are explicitly reported. Include EVERY distinct experiment — do not summarise or collapse rows. - Report numbers as bare values (no unit text) in exactly these units, converting only when the article gives a clear basis: cat conc = µM; PS conc = mM; e-D conc = M; H-D conc = M; Temperature = °C; λexc = nm; irr time = h; Turnover_frequency__* = h^-1; Quantum_yield__* = %. - catalyst, PS (photosensitizer), e-D (sacrificial electron donor), H-D (hydrogen/proton donor): use the identity (name or abbreviation) exactly as given in the article. Keep names consistent across rows. Never swap catalyst, photosensitizer, electron donor, hydrogen donor, solvent, or additive. - Turnover_number__X, Turnover_frequency__X, Quantum_yield__X are per product X (CO, CH4, H2, HCOOH). Put each product's value in its own column; never substitute CO yield, selectivity, total TON, or a value read from a graph. - For a solvent mixture, give solvent A/B/C and the ratio in solvent-ratio (for example 4:1). Keep additives out of the solvent fields. - Keep a wavelength range as a range (for example 420-650); a monochromatic source is a single nm value. - Leave a cell EMPTY only when the article does not state the value. Never invent, guess, reconstruct, or infer a value from general knowledge, figures, or discussion — every value must be explicitly supported by the article. - Do NOT use a value that appears only in the supporting information unless the main text also states it. - Never put a comma inside a cell (commas separate columns); use a space or a slash instead. - Do not add, remove, rename, or reorder columns. Before output, silently verify: section headings match exactly; no bibliographic metadata; units are as specified above; catalyst and photosensitizer are not swapped; no unsupported value was added; one row per distinct experiment. Return only the final MediaWiki entry with the CSV code block in the Investigation section.' and documents [file-YVPQVQ1WzMoHKzA6rLTLnP] 16:21:18 390312 AIClient - Response from AI: == Abstract Summary == This article describes a visible-light-driven homogeneous molecular system for the reduction of CO2 to CO using iron(II) complexes bearing bis(pyrazolyl)phenanthroline ligands as catalysts. The catalytic system combines an Fe(II) molecular catalyst, a ruthenium polypyridyl photosensitizer, and BIH as a sacrificial electron donor in mixed MeCN/H2O under CO2. All four Fe complexes were active for photocatalytic CO formation. The best overall catalyst under the standard conditions was Fe2, which gave a reported TONCO of 1318 with 84% CO selectivity. At lower catalyst loading, Fe2 reached a much higher TONCO of 23138. Fe4 gave the highest reported CO selectivity within the catalyst series under the standard comparison conditions, reaching 91%. The study also reports that moderate water content was essential for efficient catalysis and that catalyst deactivation was mainly associated with photosensitizer deterioration rather than loss of homogeneous iron catalysis. == Advances and Special Progress == The article presents several scientifically important advances for molecular photocatalytic CO2 reduction: * '''New catalyst family''': It introduces a new series of Fe(II) bis(pyrazolyl)phenanthroline complexes for homogeneous photocatalytic CO2-to-CO conversion. This ligand platform is presented as underexplored relative to more established Fe systems. * '''Use of an earth-abundant catalytic metal''': The catalytic center is iron, which is highlighted as an earth-abundant alternative to noble-metal catalysts. * '''High activity at low catalyst loading''': Fe2 reached a reported TONCO of 23138 at low catalyst concentration, showing that the system remains highly active under dilute catalyst conditions. * '''High CO selectivity''': The Fe complexes favored CO over H2. Under the standard comparison conditions, Fe4 reached 91% CO selectivity, and Fe2 also achieved up to 91% CO selectivity under optimized loading conditions. * '''Water-compatible operation''': The system operates in MeCN/H2O mixtures, and the article shows that 7.5–10% water is important for productive catalysis. * '''Mechanistic insight from multiple methods''': The work combines DFT, TD-DFT, cyclic voltammetry, emission quenching, control experiments, and Hg poisoning experiments to support a homogeneous photocatalytic mechanism. * '''Evidence for ligand-centered reduction''': Electrochemical and computational analysis support that the key reductions of the Fe complexes are primarily ligand-centered rather than simple formal metal-centered reductions. * '''Durability analysis''': The article identifies photosensitizer degradation as the main cause of photocatalytic slowdown, while the Fe catalyst is described as relatively robust under the reaction conditions. == Additional Remarks == Photocatalytic conversion of CO2 to CO is chemically important because CO is a useful feedstock and because the reaction uses light as the driving force. In this system, however, the photochemistry depends on a sacrificial donor and on a separate photosensitizer rather than on direct solar-fuel generation by the catalyst alone. The work shows a common strength of homogeneous molecular systems: the catalyst structure can be varied systematically, making it possible to relate ligand substitution to redox behavior, selectivity, and catalytic performance. The study also benefits from explicit comparison among four closely related Fe complexes. At the same time, the system retains limitations typical of sacrificial photocatalysis: * it requires a separate sacrificial electron donor, BIH; * it uses a ruthenium-based photosensitizer rather than an earth-abundant photosensitizer; * H2 evolution competes with CO formation; * long irradiation leads to activity loss, mainly because of photosensitizer deterioration. The article also shows that water has a dual role. Some water is required for efficient catalysis, but too much water lowers performance. The reported reason is that higher water content reduces BIH availability because of its poor solubility in aqueous media. == Content of the Published Article in Detail == The photocatalytic system contains three main molecular components: * an Fe(II) bis(pyrazolyl)phenanthroline complex as the CO2 reduction catalyst; * [Ru(bpy)3]2+ as the photosensitizer; * BIH as the sacrificial electron donor. The reactions were carried out in a borosilicate photoreactor containing a CO2-saturated MeCN/H2O solution. Irradiation was performed with blue light at 462 nm. Gas products in the headspace were analyzed by gas chromatography. CO and H2 were detected, while no significant amounts of formate or CH4 were detected under the reported conditions. === Molecular and electronic features of the Fe catalysts === The catalysts are Fe(II) complexes with tetradentate bis(pyrazolyl)phenanthroline ligands and two water ligands. The article reports that all complexes adopt high-spin quintet ground states and distorted octahedral geometries. DFT calculations support this assignment. UV/Vis and TD-DFT analysis show that the strong absorption bands in the ultraviolet region are mainly ligand-centered π–π* transitions. Weak lower-energy bands in the visible region are assigned to forbidden transitions. The article states that these optical properties do not imply that the Fe complexes themselves act as the photosensitizer in the catalytic system. Electrochemical analysis shows two reductions for the Fe complexes. The article discusses two possible assignments in principle, but the combination of cyclic voltammetry and DFT supports predominantly ligand-centered reductions. Thus, the reduced catalyst states are described as reduced ligand-containing iron species rather than as simple isolated low-valent metal states. === Photocatalytic setup and observed products === Under the standard photocatalytic conditions, the reaction mixture contained: * Fe catalyst: 50 μM * [Ru(bpy)3]2+: 0.3 mM * BIH: 0.11 M * solvent: CO2-saturated MeCN/H2O * temperature: 308 K * irradiation: 462 nm All Fe complexes produced CO and H2, with CO as the major carbon-containing gaseous product. No significant formate or CH4 formation was detected. === Control experiments === Control experiments showed that productive photocatalysis required the complete system. No significant formation of CO or H2 was observed when the experiment was carried out without light, without catalyst, without photosensitizer, without sacrificial donor, or under Ar instead of CO2. When Fe(ClO4)2 was used instead of the defined Fe complex, only minor amounts of CO and H2 were detected. These observations support the catalytic role of the designed molecular Fe complexes. The article also reports Hg poisoning experiments. Because Hg did not suppress the activity, the results were taken as evidence against nanoparticle-mediated catalysis and in favor of a homogeneous molecular process. === Quenching and electron-transfer sequence === The article combines DFT frontier orbital analysis with emission quenching experiments to analyze how the catalytic cycle is initiated. The data support that BIH is the dominant quencher of the excited [Ru(bpy)3]2+ photosensitizer. The article therefore supports a '''reductive quenching pathway''' as the main route. Stern–Volmer analysis gave a much larger quenching constant for BIH than for the Fe complexes. The Fe complexes also quenched emission, but less efficiently. The mechanistic interpretation presented in the article is therefore: # Light excites [Ru(bpy)3]2+. # BIH reductively quenches the excited photosensitizer. # The reduced photosensitizer can then transfer an electron to the Fe catalyst. # The Fe catalyst undergoes reduction to a catalytically relevant reduced state that is accessible within the potential window of the reduced photosensitizer. The article does not claim direct observation of all catalytic intermediates. Instead, it argues from energetic alignment, quenching data, and electrochemistry that one-electron reduction of the Fe complex is sufficient to activate the catalyst toward CO2 reduction. === Evidence for catalyst activation and CO2 reaction === Cyclic voltammetry under Ar and CO2 gave different responses. Under CO2, the voltammetric behavior changed in a way consistent with reaction of the reduced Fe species with CO2. The article interprets this as evidence that singly reduced Fe complexes react with CO2 to generate intermediates that are not simply re-oxidized on the reverse scan. The article discusses the reduced catalyst in terms of ligand-centered reduced species. It further states that water is essential because proton-coupled electron transfer steps are required for conversion of coordinated CO2 into reactive intermediates such as Fe–COOH. These species are proposed mechanistic intermediates rather than directly observed compounds. === Proposed CO2-to-CO chemistry === The article proposes that after reduction of the Fe complex and interaction with CO2, proton-coupled electron transfer assists formation of a metal-bound carboxyl-type intermediate, described in the text as Fe–COOH. Subsequent steps lead to CO formation and release. This mechanistic picture is presented cautiously and is supported indirectly by: * the requirement for water; * improved catalysis in the presence of 7.5–10% water; * electrochemical evidence that reduced Fe species react with CO2; * the need for a sacrificial electron donor and illuminated photosensitizer; * suppression of catalysis under component-omission controls. === Role of water === Water content strongly affected activity and selectivity. In dry MeCN, CO formation was almost completely suppressed. Adding 7.5% water caused a strong increase in both activity and CO selectivity. At 10% water, high activity was maintained. At higher water fractions, activity decreased. The article explains this in two ways: * water acts as a proton source and helps proton-coupled electron transfer; * water may stabilize key intermediates through hydrogen bonding. At the same time, too much water lowers BIH availability because BIH is poorly soluble in more aqueous media. === Catalyst comparison and durability === Among Fe1–Fe4, Fe2 gave the highest overall activity under the standard comparison conditions, while Fe4 gave the highest CO selectivity in that comparison. Lowering the Fe2 concentration greatly increased TONCO. The time-course study showed that activity increased strongly at early times and then approached a plateau at longer irradiation times. The article attributes the slowdown mainly to photodegradation of [Ru(bpy)3]2+. Additional photosensitizer restored catalytic turnover, which supports that interpretation. The Fe catalyst is therefore described as relatively robust, although some decomposition under the reaction conditions is not excluded. == Catalyst == The catalysts are molecular homogeneous iron(II) complexes of the general type [Fe(bpzRphen)(H2O)2]X2, where the ligand is a tetradentate bis(pyrazolyl)phenanthroline derivative. The article studies four catalysts: * '''Fe1''': [Fe(bpzphen)(H2O)2](BF4)2 * '''Fe2''': [Fe(bpzMe2phen)(H2O)2](BF4)2 * '''Fe3''': [Fe(bpzPhphen)(H2O)2](ClO4)2 * '''Fe4''': [Fe(bpzCF3phen)(H2O)2](ClO4)2 Chemically, these are mononuclear Fe(II) coordination complexes with distorted octahedral geometries, high-spin quintet ground states, and two coordinated water molecules. Their reductions are described as primarily ligand-centered on the bis(pyrazolyl)phenanthroline framework. Catalytically, they function as CO2 reduction catalysts in a homogeneous visible-light system. All four produce CO from CO2, with H2 as a competing side product. Fe2 is the most active catalyst in the series under the standard comparison conditions, while Fe4 gives the highest CO selectivity in that comparison. The article also notes a structural feature specific to Fe4: weak intramolecular H···F interactions involving the CF3 substituents and water ligands. The article suggests that this may contribute to enhanced CO selectivity, but this is presented as an interpretation rather than direct proof. Regarding stability, the article concludes that the catalytic system is homogeneous and reasonably robust, with deactivation arising mainly from deterioration of the photosensitizer rather than from dominant loss of the Fe catalyst. == Photosensitizer == The photosensitizer is '''[Ru(bpy)3]2+''', introduced experimentally as [Ru(bpy)3]Cl2. It is a molecular ruthenium polypyridyl photosensitizer that absorbs the incident blue light and initiates the photoredox sequence. The article discusses its triplet metal-to-ligand charge-transfer excited state and shows through quenching experiments that this excited state is quenched much more efficiently by BIH than by the Fe catalysts. Thus, the article supports '''reductive quenching''' of the excited photosensitizer by BIH as the dominant pathway. The reduced photosensitizer is then proposed to transfer electrons to the Fe catalyst. The photosensitizer is suitable in this system because its redox properties are compatible with electron transfer from BIH and subsequent electron transfer to the Fe catalyst. However, the article also identifies it as the main weak point in long-term operation: prolonged irradiation causes photodeterioration, and this loss of photosensitizer activity is presented as the main cause of catalytic slowdown. == Investigation == ```csv catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Fe1 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , not reported , , 35 , 462 , 24 , 987 , 41.1 , , , 187 , 7.8 , , , , H2O , not reported Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , not reported , , 35 , 462 , 24 , 1318 , 54.9 , , , 243 , 10.1 , , , , H2O , not reported Fe3 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , not reported , , 35 , 462 , 24 , 847 , 35.3 , , , 205 , 8.5 , , , , H2O , not reported Fe4 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , not reported , , 35 , 462 , 24 , 1265 , 52.7 , , , 133 , 5.5 , , , , H2O , not reported Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , not reported , , 35 , 462 , 4 , 311 , 77.7 , , , 51 , 12.8 , , , , H2O , not reported Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , not reported , , 35 , 462 , 48 , 1578 , 32.9 , , , 296 , 6.2 , , , , H2O , not reported Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , not reported , , 35 , 462 , 96 , 1593 , 16.6 , , , 300 , 3.1 , , , , H2O , not reported Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , , , not reported , , , CO2 , not reported , , 35 , 462 , 24 , 2 , not reported , , , 22 , not reported , , , , , Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , not reported , , 35 , 462 , 24 , 1352 , 56.3 , , , 285 , 11.9 , , , , H2O , not reported Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , not reported , , 35 , 462 , 24 , 661 , 27.5 , , , 191 , 8.0 , , , , H2O , not reported Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , not reported , , 35 , 462 , 24 , 621 , 25.8 , , , 77 , 3.2 , , , , H2O , not reported Fe2 , 25.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , not reported , , 35 , 462 , 24 , 2086 , 86.9 , , , 123 , 5.1 , , , , H2O , not reported Fe2 , 12.5 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , not reported , , 35 , 462 , 24 , 4259 , 177.4 , , , 276 , 11.5 , , , , H2O , not reported Fe2 , 6.25 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , not reported , , 35 , 462 , 24 , 10168 , 423.7 , , , 862 , 35.9 , , , , H2O , not reported Fe2 , 3.12 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , not reported , , 35 , 462 , 24 , 23138 , 964.1 , , , 2177 , 90.7 , , , , H2O , not reported Fe2 , 3.12 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , not reported , , 35 , 462 , 4 , 9754 , 2438 , 8.24 , , not reported , not reported , , , , H2O , not reported ``` 17:00:01 391786 AIClient - Request to AI with prompt: 'please check if the given text is spam. answer with yes or no.' and documents [Perub ahan pola aktivitas masyarakat urban di era modern telah memicu lahirnya berbagai platform hiburan yang mengutamakan efisiensi tanpa mengorbankan kualitas estetika. Di tengah kepungan rutinitas harian yang padat, kebutuhan akan media rekreasi yang praktis dan interaktif menjadi sangat penting untuk menjaga keseimbangan mental. Berdasarkan pengamatan saya terhadap tren gaya hidup digital, esensi dari sebuah kepuasan bermain saat ini sangat ditentukan oleh bagaimana sebuah platform mampu menyajikan sistem yang adil dan responsif. Salah satu platform yang belakangan ini mendapat apresiasi luas dan sering dijadikan rekomendasi oleh para pencinta hiburan visual adalah pttogel yang sukses menghadirkan integrasi permainan yang adaptif serta jaminan keamanan data yang optimal. Menikmati hiburan di ruang virtual ini bukan lagi sekadar urusan memenangkan angka taruhan, melainkan tentang bagaimana kita mengapresiasi sebuah karya arsitektur digital yang dirancang khusus untuk menyajikan ketegangan yang sehat, aman, dan sepenuhnya menghormati ruang privasi setiap penggunanya. Eksplorasi Estetika Interaktif pada Tema Slot Kontemporer Daya tarik utama yang membuat permainan gulungan gambar digital begitu diminati terletak pada kemampuan para perancang perangkat lunak dalam menyatukan elemen seni murni dengan teknologi komputasi. Format klasik tiga gulungan konvensional kini telah bermetamorfosis menjadi panggung penceritaan yang megah dan penuh dengan dinamika kejutan visual. Pemain diajak untuk terlibat langsung dalam sebuah narasi besar, mulai dari misi penyelamatan harta karun di situs kuno yang sakral, penjelajahan galaksi luar angkasa, hingga kemewahan pesta budaya dari berbagai belahan dunia. Visualisasi beresolusi tinggi yang didukung oleh transisi animasi tiga dimensi yang halus serta ilustrasi musik latar sinematik berhasil menciptakan atmosfer bermain yang sangat mendalam. Inovasi konseptual inilah yang membuat ekosistem permainan ini selalu terasa hidup dan dinamis, karena setiap judul baru selalu menawarkan keunikan estetika yang memanjakan mata dan imajinasi. Sentuhan Elegansi dan Ketajaman Analisis di Meja Kasino Klasik Jika permainan gulungan gambar menawarkan stimulasi visual yang serba cepat, maka area meja permainan kasino klasik menyuguhkan atmosfer hiburan yang lebih kontemplatif, taktis, dan elegan. Permainan kartu strategi atau tebakan angka pada roda berputar menuntut kombinasi yang seimbang antara ketenangan emosional dan ketajaman dalam membaca peluang matematis. Melalui format digital, sensasi ketegangan ini berhasil dipertahankan dengan sangat baik berkat penerapan teknologi siaran langsung beresolusi tinggi yang menampilkan setiap detail pergerakan secara transparan tanpa jeda. Detik-detik krusial saat menunggu bola kecil melambat di atas roda atau ketika kartu penentu mulai dibuka menciptakan sebuah getaran adrenalin yang sangat unik bagi pikiran kita. Keunggulan utama dari format virtual ini adalah kemampuannya menyajikan intensitas kompetitif yang otentik, namun tetap memberikan keleluasaan penuh bagi Anda untuk bermain dengan tenang di dalam ruang personal yang nyaman. Prinsip Kedewasaan Mental sebagai Kunci Utama Kendali Diri Sebagai seorang pengamat gaya hidup digital, saya selalu menekankan bahwa keindahan dari aktivitas hiburan ini hanya dapat dirasakan sepenuhnya jika kita memiliki kedewasaan mental yang kuat dalam mengelola ekspektasi. Menikmati permainan kasino digital esensinya adalah tentang membeli sebuah pengalaman rekreasi interaktif yang menyenangkan, bukan sebuah jalan pintas untuk mengubah kondisi finansial secara instan. Pemain yang bijak selalu memulai sesi mereka dengan menetapkan batasan personal yang sangat tegas sebelum permainan dimulai, baik itu batasan waktu bermain maupun batas anggaran dana sekunder yang rela dialokasikan sebagai biaya rekreasi. Dengan mengadopsi pola pikir yang sehat bahwa modal yang digunakan adalah biaya hiburan yang sah, kita akan dapat merayakan setiap kemenangan dengan penuh rasa syukur dan menerima setiap kekalahan dengan lapang dada tanpa mengganggu stabilitas emosional harian. Sertifikasi Global dan Transparansi Sistem Keberuntungan Acak Di balik gemerlapnya desain grafis dan kemudahan akses kegembiraan, pilar paling fundamental yang menjaga rasa percaya para pemain adalah transparansi sistem yang berjalan di balik layar. Platform digital yang bertanggung jawab selalu menempatkan aspek keamanan data privasi sebagai prioritas mutlak melalui penerapan protokol enkripsi berlapis yang diperbarui secara berkala untuk menangkal risiko intervensi pihak luar. Selain itu, keadilan dalam setiap putaran permainan dijamin secara mutlak melalui penggunaan algoritma generator angka acak yang telah lolos uji dan mendapatkan sertifikasi resmi dari lembaga audit independen internasional. Transparansi matematis inilah yang memastikan bahwa setiap hasil permainan yang muncul murni terjadi karena faktor peluang alami tanpa adanya manipulasi dari pihak mana pun, sehingga memberikan hak bermain yang adil bagi semua penggunanya. Visi Masa Depan dan Kesimpulan Menikmati Dunia Kasino Digital Melihat perkembangan teknologi komputasi yang bergerak secara eksponensial, masa depan dari industri slot dan kasino virtual diprediksi akan semakin imersif dengan pemanfaatan teknologi realitas virtual yang lebih luas. Pengalaman bermain ke depan tidak lagi sebatas interaksi satu arah dengan layar gadget, melainkan keterlibatan aktif dalam ekosistem virtual tiga dimensi yang terasa sangat nyata secara sosial. Namun, terlepas dari seberapa canggih teknologi yang akan diterapkan nantinya, nilai fundamental dari aktivitas ini tetap bertumpu pada kebijaksanaan para penggunanya. Memilih platform yang memiliki reputasi terpercaya, mempertahankan kedisiplinan kontrol diri yang ketat, serta menikmati setiap sesi sebagai bentuk seni visual adalah formula terbaik untuk memastikan bahwa keterlibatan Anda dalam dunia kasino digital akan selalu menjadi cerita hiburan yang positif, aman, dan menyegarkan pikiran.] 17:00:04 391786 AIClient - Response from AI: Yes 17:00:04 391786 AIClient - Request to AI with prompt: 'please check if the given text is spam. answer with yes or no.' and documents [Lom patan besar dalam dunia teknologi telah membuka jalan bagi terciptanya berbagai opsi hiburan alternatif yang jauh lebih modern dan efisien. Di masa kini, masyarakat tidak lagi harus mengorbankan waktu produktif mereka hanya untuk mencari sarana rekreasi fisik, karena seluruh ekosistem permainan telah terintegrasi secara sempurna ke dalam jaringan siber global. Namun, tingginya kuantitas situs yang bermunculan di jejaring internet menuntut para pengguna untuk bersikap lebih kritis dan selektif dalam mengidentifikasi platform mana yang benar-benar berkomitmen pada aspek keamanan informasi serta transparansi hukum. Berdasarkan akumulasi ulasan positif dan tingkat kepuasan komunitas yang tinggi, memanfaatkan platform profesional seperti violin88 merupakan rekomendasi paling tepat yang sangat ideal karena konsistensinya dalam menerapkan protokol proteksi data tingkat tinggi serta keterbukaan mekanisme operasional. Memilih mitra hiburan yang memiliki rekam jejak bersih sejak awal merupakan sebuah langkah preventif yang sangat fundamental bagi setiap individu untuk memastikan bahwa seluruh aktivitas pelepas penat mereka dapat dinikmati dengan rasa aman dan kenyamanan psikologis yang maksimal. Keunggulan utama yang ditawarkan oleh industri kasino virtual generasi terbaru terletak pada implementasi desain antarmuka yang sangat humanis dan ramah pengguna. Struktur navigasi halaman diatur sedemikian rupa dengan pendekatan ergonomis yang matang, sehingga seluruh menu dapat dipahami secara instan oleh pengguna dari berbagai latar belakang tanpa harus melalui proses adaptasi teknis yang rumit. Penyelarasan yang seimbang antara kecepatan pemrosesan data komputer dengan keindahan tata letak estetika visual ini berhasil menciptakan sebuah parameter baru dalam industri hiburan daring, di mana efisiensi akses dan kepuasan emosional konsumen ditempatkan sebagai prioritas utama dari seluruh pengembangan layanan yang disajikan secara berkelanjutan kepada masyarakat luas. Kompleksitas Desain Seni Visual Tematik dan Standardisasi Validasi Sistem[edit | edit source] Apabila kita menelaah lebih mendalam mengenai faktor utama yang melandasi popularitas permainan slot berbasis digital saat ini, aspek kreativitas tematik memegang peranan yang sangat vital sebagai motor penggerak utama. Industri modern telah meninggalkan format konvensional yang kaku dan beralih ke pembuatan konten interaktif yang dilengkapi dengan alur cerita yang mendalam serta dramatis. Pemain diberikan kebebasan penuh untuk berganti suasana sesuai dengan preferensi emosional mereka, mulai dari merasakan ketegangan mengeksplorasi peninggalan sejarah kuno, menikmati keindahan mitologi klasik, hingga menyaksikan kemegahan peradaban masa depan yang penuh imajinasi, di mana seluruh petualangan tersebut dihidupkan melalui kualitas grafis beresolusi tinggi serta efek suara sinematik yang memukau. Namun kemegahan visual tentu tidak akan memiliki nilai jangka panjang tanpa adanya jaminan keadilan mekanis yang mutlak di balik layar pengoperasiannya. Platform digital yang memiliki integritas tinggi selalu menerapkan sistem komputasi berbasis algoritma matematika pengacak angka mandiri yang telah melalui serangkaian uji kelayakan dan audit ketat dari lembaga sertifikasi independen internasional. Protokol keamanan ini menjamin secara mutlak bahwa setiap hasil akhir yang muncul dari suatu putaran bersifat independen, acak, dan murni didasarkan pada hukum probabilitas matematis tanpa adanya celah untuk intervensi atau manipulasi dari pihak internal maupun eksternal. Keterbukaan sistem inilah yang menjadi pilar utama dalam membangun fondasi rasa percaya yang mendalam di dalam komunitas pemain virtual di seluruh belahan dunia. Kestabilan Infrastruktur Server dan Efisiensi Akses Lintas Perangkat[edit | edit source] Parameter penting lainnya yang menjadi tolak ukur dari sebuah penyedia layanan hiburan siber yang profesional adalah kekuatan serta kestabilan dari infrastruktur server yang mereka kelola secara mandiri. Di tengah dinamika mobilitas masyarakat modern yang bergerak dengan sangat cepat, kemampuan sebuah situs untuk memproses pertukaran data secara instan tanpa mengalami hambatan teknis seperti kegagalan koneksi mendadak atau penundaan sistem adalah hal yang tidak bisa ditawar lagi. Kelancaran operasional ini memberikan kontribusi psikologis yang sangat positif bagi para pengguna, karena mereka dapat menikmati jalannya permainan secara konsisten dengan fokus yang penuh tanpa perlu dirundung rasa cemas akan kehilangan momentum berharga akibat gangguan operasional server. Fleksibilitas ini juga diwujudkan melalui optimalisasi tampilan halaman yang sangat responsif di berbagai jenis gawai elektronik yang beredar di masyarakat saat ini. Baik diakses menggunakan layar monitor komputer meja yang besar, komputer jinjing yang praktis, hingga layar ponsel pintar yang ringkas dalam genggaman, seluruh fungsi mekanis dan keindahan visual permainan akan menyesuaikan diri secara otomatis dengan sangat sempurna. Kebebasan penuh ini memberikan otoritas bagi pengguna untuk mengatur sendiri waktu dan lokasi yang paling ideal bagi mereka untuk melepas penat dari tekanan rutitinas harian, didukung penuh oleh sistem enkripsi data tingkat tinggi yang menjamin kerahasiaan informasi privasi digital mereka dengan sangat aman dari segala potensi ancaman siber yang tidak diinginkan. Stimulasi Sosial dan Dinamika Komunitas Inklusif di Ekosistem Virtual[edit | edit source] Pandangan konvensional yang sering kali mencap aktivitas bermain di platform virtual sebagai kegiatan yang terisolasi dan memisahkan individu dari lingkungan sosial kini telah sepenuhnya dipatahkan oleh hadirnya inovasi fitur interaktif modern yang mutakhir. Pengadopsian format permainan langsung yang disiarkan secara real-time dengan dipandu langsung oleh pembawa acara manusia profesional berhasil menghadirkan atmosfer komunal yang sangat hidup dan penuh energi positif langsung ke hadapan para pengguna. Kehadiran elemen interaksi dua arah ini mampu mereplikasi kehangatan sosial yang biasa ditemukan di dunia nyata, menghapus batasan jarak geografis, sekaligus menyatukan beragam individu dalam sebuah ruang siber yang interaktif dan dinamis. Integrasi ruang obrolan yang disematkan secara terstruktur di dalam sistem juga menjelma menjadi sarana yang sangat efektif untuk membangun pola komunikasi yang sehat antar sesama pengguna di internet. Di dalam wadah publik digital ini, para pemain dapat saling berbagi pandangan mengenai karakteristik permainan terbaru, mendiskusikan taktik bermain yang efisien, memberikan ulasan mandiri yang jujur, atau sekadar berbincang santai untuk merayakan keberhasilan bersama secara kolektif. Dinamika kelompok yang positif, terbuka, dan inklusif ini memberikan nilai tambah yang luar biasa signifikan, menegaskan bahwa platform hiburan digital masa kini telah berevolusi menjadi sebuah ekosistem sosial baru yang dinamis, edukatif, dan terus bergerak maju secara positif mengikuti perkembangan zaman.] 17:00:06 391786 AIClient - Response from AI: Yes 17:00:06 391786 AIClient - Request to AI with prompt: 'please check if the given text is spam. answer with yes or no.' and documents [Pergeseran cara masyarakat moderen dalam menikmati waktu senggang telah melahirkan standar baru yang jauh lebih tinggi, di mana platform bereputasi seperti delapantoto kini hadir sebagai jawaban atas kebutuhan akan sebuah ruang rekreasi yang mampu menyatukan integritas keamanan dengan estetika visual tingkat tinggi. Menghadirkan kenyamanan bermain di era digital bukan lagi sekadar perkara menyediakan variasi permainan yang banyak, melainkan bagaimana membangun sebuah ekosistem yang responsif dan menghargai privasi setiap penggunanya. Ketika sebuah teknologi mampu beroperasi tanpa hambatan teknis, diiringi dengan kepastian keadilan sistem yang transparan, pengalaman bermain bertransformasi menjadi sebuah petualangan interaktif yang sangat memuaskan. Setiap ketukan pada layar gawai kini memberikan dimensi hiburan baru yang tidak hanya memicu adrenalin, tetapi juga memberikan ketenangan pikiran berkat implementasi sistem enkripsi mutakhir yang menjaga kenyamanan personal secara menyeluruh sepanjang waktu. Keandalan infrastruktur digital ini juga tecermin dari kehalusan transisi visual yang disajikan di setiap halaman. Desain antarmuka yang bersih dan ergonomis memastikan bahwa fokus pengunjung tidak akan terpecah oleh distraksi yang tidak perlu, sehingga mereka dapat sepenuhnya menikmati keindahan mekanik permainan yang sedang berlangsung dalam suasana yang eksklusif dan privat. Estetika Matematika di Balik Keindahan Gulungan Digital[edit | edit source] Di balik kemegahan grafis yang memanjakan mata, industri permainan kasino dan slot modern sesungguhnya ditopang oleh perhitungan sains dan matematika murni yang sangat disiplin. Setiap putaran gulungan digerakkan oleh algoritma generator angka acak yang keandalannya selalu diawasi dan disertifikasi oleh lembaga audit independen tingkat internasional. Sinkronisasi antara kalkulasi matematika yang jujur dan respons visual yang instan inilah yang membangun rasa percaya diri bagi para penikmat hiburan untuk merumuskan strategi bermain mereka secara lebih matang dan objektif. Kehadiran fitur-fitur baru seperti sistem pembayaran kluster, mekanik runtuhan simbol yang memberikan peluang berantai, hingga ekspansi area bermain yang dinamis memberikan lapisan kegembiraan yang berlapis. Hal ini memastikan bahwa volatilitas permainan bekerja sesuai dengan standar keadilan global, memberikan kesempatan yang sama bagi setiap individu untuk menguji konsistensi dan ketangkasan mental mereka di tengah jalannya permainan. Eksplorasi Naratif sebagai Media Penyegaran Mental yang Efektif[edit | edit source] Salah satu lompatan kreatif terbesar dalam evolusi industri hiburan ini adalah adopsi narasi tematik yang sangat kaya dan mendalam di setiap varian permainan. Permainan tidak lagi terasa sunyi atau monoton karena telah menjelma menjadi media penceritaan yang interaktif. Pengunjung dibawa melintasi berbagai dimensi waktu dan budaya, mulai dari mitologi dewa-dewa kuno yang agung, penjelajahan hutan tropis yang penuh misteri, hingga visualisasi masa depan bertema fiksi ilmiah yang serba canggih. Pendekatan sinematik ini diperkuat dengan kualitas audio spasial yang mampu menyesuaikan ritme berdasarkan situasi permainan. Perubahan tema ini bukan sekadar kosmetik visual, melainkan memengaruhi seluruh presentasi audio dan transisi animasi kemenangan. Hal inilah yang membuat aktivitas bermain tetap terasa segar dan menantang, karena selalu ada dunia baru yang siap untuk dieksplorasi dengan karakteristik dan aturan uniknya masing-masing. Filosofi Regulasi Diri dan Menjaga Keseimbangan Gaya Hidup[edit | edit source] Menikmati keindahan teknologi kasino modern secara optimal membutuhkan pemahaman yang mendalam mengenai konsep kedewasaan bermain dan kontrol diri yang kokoh. Sebagai penikmat hiburan yang cerdas, langkah paling bijak yang harus diambil adalah memandang aktivitas ini murni sebagai sarana relaksasi untuk melepaskan penat setelah menjalani rutinitas harian yang padat. Menetapkan batasan modal dan manajemen waktu yang disiplin sebelum memulai sesi adalah kunci utama untuk menjaga kualitas hiburan tetap berada pada jalurnya yang positif. With having a structured and rational play plan, you will avoid making decisions based on temporary emotions. Ketenangan pikiran dalam menyikapi setiap fluktuasi permainan adalah tanda dari seorang pemain sejati yang tahu bagaimana cara menghargai sebuah proses hiburan. Pada akhirnya, kepuasan tertinggi dari dunia virtual ini diperoleh ketika kita mampu menikmati kecanggihan teknologi yang disajikan dengan penuh rasa tanggung jawab dan keseimbangan hidup yang terjaga dengan baik.] 17:00:07 391786 AIClient - Response from AI: Yes 17:00:07 391786 AIClient - Request to AI with prompt: 'please check if the given text is spam. answer with yes or no.' and documents [Perubahan pola perilaku masyarakat dalam mencari hiburan di tengah padatnya arus informasi saat ini telah melahirkan ruang-ruang kreatif baru yang jauh lebih fleksibel dan mudah diakses. Permainan ketangkasan berbasis gulungan visual kini menjelma menjadi salah satu pilihan utama bagi mereka yang menginginkan rekreasi instan yang memicu adrenalin sekaligus memanjakan mata. Dalam proses pencarian wadah bermain yang ideal, faktor integritas dan kenyamanan sistem menjadi indikator utama yang membedakan sebuah layanan berkualitas tinggi dengan yang biasa saja. Sebagai sebuah bentuk rekomendasi tepercaya bagi Anda yang mendambakan suasana bermain yang elegan, aman, dan penuh kejutan, mengunjungi angkaraja adalah langkah paling tepat karena platform ini terbukti mampu menyelaraskan keadilan algoritma dengan sistem proteksi mutakhir yang menjaga privasi setiap penggunanya. Memilih tempat yang tepat sejak awal akan menghindarkan Anda dari berbagai risiko digital, sehingga setiap detik yang Anda habiskan di depan layar benar-benar berfungsi sebagai sarana pelepas penat yang berkualitas tinggi dan memberikan ketenangan pikiran yang sejati. Rekayasa Animasi dan Sensasi Estetika Interaktif[edit | edit source] Industri permainan digital modern telah bertransformasi dari sekadar perangkat lunak sederhana menjadi sebuah karya seni multimedia yang sangat kompleks dan imersif. Para pengembang tidak lagi hanya berfokus pada hasil akhir, melainkan pada penciptaan atmosfer yang mampu membawa pemain masuk ke dalam alur cerita yang dihadirkan melalui kombinasi grafis beresolusi tinggi dan tata suara sinematik. Setiap putaran gulungan di layar gawai dirancang sedemikian rupa agar memberikan transisi visual yang halus, menciptakan ketegangan positif yang sangat menghibur bagi siapa saja yang menyaksikannya. Kedalaman pengalaman ini semakin diperkaya dengan hadirnya fitur-fitur mekanis baru yang menuntut kejelian dan strategi dari para pemainnya. Sistem bonus bertingkat, simbol yang dapat berubah wujud secara acak, hingga mode putaran gratis dengan pengganda nilai kumulatif adalah beberapa contoh inovasi yang membuat ritme permainan menjadi sangat dinamis. Fleksibilitas tema yang ditawarkan—mulai dari adaptasi legenda kuno hingga konsep fiksi ilmiah masa depan—memastikan bahwa selalu ada petualangan baru yang siap dieksplorasi tanpa rasa jenuh. Arsitektur Proteksi Siber dan Keandalan Tata Kelola Platform[edit | edit source] Kenyamanan psikologis seorang pengguna di dunia maya hanya dapat terwujud apabila ada jaminan keamanan data yang bekerja secara penuh dan tidak kasat mata di balik layar siber. Kepercayaan publik merupakan aset yang sangat mahal, dan platform hiburan kelas atas selalu menempatkan proteksi privasi sebagai standar operasional prosedur yang tidak dapat diganggu gugat. Penerapan protokol enkripsi data berlapis memastikan bahwa seluruh riwayat komunikasi dan informasi personal milik pengguna tetap terlindungi secara maksimal dari segala potensi kebocoran. Selain faktor keamanan, efisiensi dalam hal pelayanan operasional harian juga menjadi tolok ukur profesionalisme sebuah platform dalam mengelola ekosistemnya. Keterbukaan informasi mengenai aturan permainan, kecepatan pemrosesan setiap permintaan transaksi, serta kehadiran tim layanan konsumen yang responsif selama dua puluh empat jam penuh adalah pilar utama yang membangun reputasi jangka panjang. Ketika aspek keadilan sistem dan kenyamanan teknis ini berjalan secara harmonis, pemain dapat melepaskan seluruh beban pikiran mereka dan menikmati permainan dengan fokus yang optimal. Pendekatan Dewasa dan Bijak dalam Mengisi Waktu Senggang[edit | edit source] Menikmati segala bentuk keindahan teknologi permainan digital secara maksimal menuntut kita untuk memiliki pola pikir yang matang dan sadar mengenai fungsi asli dari hiburan itu sendiri. Aktivitas bermain ini sejatinya adalah sebuah media rekreasi mental, sebuah jeda singkat yang menyenangkan untuk menyegarkan kembali semangat setelah seharian bergelut dengan tuntutan pekerjaan yang menguras energi. Memiliki kontrol penuh atas waktu dan keputusan yang diambil selama sesi permainan adalah ciri utama dari seorang pengguna yang cerdas dalam memanfaatkan kemajuan teknologi modern. Setiap hasil yang tertera di atas layar kaca adalah bagian dari seni ketidakpastian yang justru menjadi inti dari daya tarik dunia hiburan daring ini, sehingga menikmati setiap prosesnya dengan kepala dingin adalah kunci kebahagiaan yang sesungguhnya. Dengan mengapresiasi inovasi perangkat lunak, detail desain karakter, serta keharmonisan suara yang disajikan, kita dapat memetik nilai hiburan yang jauh lebih tinggi dan bermakna. Pada akhirnya, ruang hiburan virtual hadir sebagai alternatif penyegar pikiran di era digital, menawarkan sebuah tempat pelarian yang aman, adil, dan berkualitas tinggi untuk melengkapi warna-warni kehidupan modern kita.] 17:00:09 391786 AIClient - Response from AI: Yes 17:00:09 391786 AIClient - Request to AI with prompt: 'please check if the given text is spam. answer with yes or no.' and documents [Laju perkembangan teknologi modern terus menghadirkan kejutan di sektor hiburan, menciptakan ruang-ruang santai interaktif yang bisa diakses dengan sangat mudah dari mana saja. Di antara sekian banyak pilihan aktivitas virtual yang bertebaran di internet, permainan slot dan ketangkasan meja kasino tetap menempati urutan teratas sebagai hiburan yang paling diminati. Keunikan dari aktivitas ini bukan lagi sekadar mencari hasil akhir, melainkan menikmati setiap detik putaran yang penuh dengan kejutan visual serta dinamika yang menggugah rasa ingin tahu. Bagi Anda yang sedang merencanakan waktu luang dan ingin merasakan atmosfer bermain yang berkelas dengan dukungan sistem yang sangat stabil, mengunjungi violin88 adalah sebuah langkah yang sangat direkomendasikan untuk memulai petualangan baru yang penuh warna. Memilih platform yang tepat bukan hanya tentang mencari kesenangan instan, melainkan tentang bagaimana menikmati sebuah proses rekreasi digital dengan jaminan rasa nyaman dan kepuasan visual yang maksimal. Contents 1 Evolusi Grafis Sinematik di Layar Gawai Anda 2 Seni Mengelola Strategi dan Menjaga Keseimbangan Emosi 3 Keberagaman Narasi Tematik yang Menghapus Kejenuhan 4 Menilai Kualitas Platform Melalui Infrastruktur Teknologi 5 Kekuatan Ulasan Komunitas dalam Menemukan Tempat Bermain Terbaik Evolusi Grafis Sinematik di Layar Gawai Anda[edit | edit source] Pergeseran dari meja kasino konvensional menuju format virtual telah membuka gerbang kreativitas yang luar biasa luas bagi para perancang permainan dunia. Format digital modern kini tidak lagi kaku, melainkan hadir dengan visual tiga dimensi yang halus, pencahayaan dramatis, serta efek suara imersif yang mampu membawa atmosfer kemegahan gedung kasino langsung ke hadapan Anda. Kemudahan akses ini memberikan kebebasan mutlak bagi setiap pengguna untuk menentukan sendiri kapan dan di mana mereka ingin memulai sesi permainan tanpa terikat aturan waktu. Fleksibilitas operasional seperti inilah yang membuat aktivitas bermain kasino online terasa begitu personal dan adaptif terhadap gaya hidup masyarakat modern yang serba cepat. Seni Mengelola Strategi dan Menjaga Keseimbangan Emosi[edit | edit source] Menikmati keindahan permainan kasino secara paripurna menuntut pemahaman mendalam bahwa aktivitas ini adalah sebuah bentuk seni mengendalikan diri sendiri di tengah jalannya permainan yang dinamis. Banyak pemain senior selalu menekankan pentingnya memiliki rencana yang matang, mulai dari menetapkan batasan modal harian hingga mengetahui momen yang tepat untuk mengambil jeda istirahat. Memahami cara kerja mekanisme permainan serta tingkat volatilitas akan memberikan sudut pandang yang lebih objektif dalam mengambil keputusan di setiap putaran. Menjaga kepala tetap dingin dan tidak terburu-buru adalah kunci utama yang mengubah aktivitas spekulatif ini menjadi sebuah hobi yang sehat, terukur, dan tetap menyenangkan untuk dijalani. Keberagaman Narasi Tematik yang Menghapus Kejenuhan[edit | edit source] Daya tarik utama yang membuat ekosistem slot virtual tidak pernah kehilangan basis penggemarnya adalah pembaruan konten tematik yang dilakukan secara konsisten oleh para pengembang. Pemain diundang untuk menjelajahi berbagai konsep cerita yang menarik, mulai dari mitologi kuno yang penuh misteri, petualangan fiksi ilmiah di luar angkasa, hingga tema festival modern yang meriah. Setiap judul permainan baru tidak sekadar menawarkan estetika visual yang berbeda, tetapi juga memperkenalkan struktur fitur unik seperti simbol misterius atau mini-game interaktif yang tertanam di dalam permainan utama. Keberagaman konsep ini menjadi jaminan utama bahwa rasa jenuh tidak akan pernah menjadi hambatan bagi siapa saja yang ingin mengeksplorasi dunia kasino digital lebih jauh. Menilai Kualitas Platform Melalui Infrastruktur Teknologi[edit | edit source] Dalam industri hiburan berbasis internet, kenyamanan psikologis pengguna sangat ditentukan oleh kualitas infrastruktur digital yang disediakan oleh penyedia layanan. Sebuah situs kasino virtual yang ideal wajib menerapkan protokol keamanan tingkat tinggi dan enkripsi berlapis untuk memastikan seluruh informasi pribadi penggunanya tetap terlindungi dengan sempurna. Selain faktor proteksi data, kestabilan server dalam memproses transisi permainan tanpa adanya kendala teknis atau lag visual merupakan parameter penting untuk menilai profesionalisme pengelola platform. Ketika semua aspek infrastruktur teknis ini berjalan dengan tanpa cela, pemain dapat melepaskan semua kekhawatiran mereka dan menikmati jalannya permainan dengan fokus penuh. Kekuatan Ulasan Komunitas dalam Menemukan Tempat Bermain Terbaik[edit | edit source] Mengingat pertumbuhan jumlah situs hiburan di internet yang sangat masif, memiliki panduan yang jernih dan objektif menjadi hal yang sangat krusial bagi setiap pemain baru maupun berpengalaman. Di sinilah pentingnya membaca ulasan yang jujur serta mendengarkan rekomendasi otentik yang lahir dari pengalaman nyata sesama pengguna di dalam komunitas diskusi digital. Saling berbagi informasi mengenai responsivitas layanan pelanggan, stabilitas server, hingga variasi permainan yang paling menghibur adalah cara terbaik untuk menyaring informasi di tengah padatnya pilihan. Memanfaatkan referensi dari sumber yang tepercaya akan menghemat waktu Anda, sekaligus mengantarkan Anda langsung pada platform hiburan yang mampu memberikan standar kenyamanan tertinggi.] 17:00:10 391786 AIClient - Response from AI: Yes 17:00:10 391786 AIClient - Request to AI with prompt: 'please check if the given text is spam. answer with yes or no.' and documents [Lompatan teknologi komunikasi global telah membawa dampak besar bagi restrukturisasi pola rekreasi masyarakat modern di sela-sela padatnya aktivitas profesional sehari-hari. Menikmati ruang hiburan siber berbasis ketangkasan taktis kini tidak lagi dipandang sebagai aktivitas selingan biasa, melainkan telah bertumbuh menjadi sebuah bentuk apresiasi terhadap media interaktif yang kaya akan nilai estetika visual dan kecepatan teknologi. Dalam menentukan wadah bermain yang ideal, komunitas pengguna saat ini jauh lebih kritis dan selektif dengan memprioritaskan faktor kenyamanan sistem, responsivitas navigasi, serta keadilan mekanis yang transparan. Sebagai salah satu ekosistem yang paling konsisten mendapatkan rekomendasi positif karena performa servernya yang andal, kehadiran violin88 mampu menjawab ekspektasi tinggi tersebut dengan menyajikan sistem perlindungan privasi tingkat tinggi yang dipadukan dengan desain antarmuka yang sangat ramah pengguna. Adanya jaminan rasa aman yang solid ini memberikan ketenangan psikologis yang mendasar bagi para pencinta hiburan virtual, memungkinkan mereka untuk larut sepenuhnya dalam keseruan strategi tanpa perlu mencemaskan adanya celah kendala teknis dari perangkat genggam mereka kapan saja. Contents 1 Metamorfosis Seni Ilustrasi dan Narasi Tematis Gulungan Interaktif 2 Transparansi Sistem Sebagai Standardisasi Keadilan Mekanis yang Mutakhir 3 Rekonstruksi Atmosfer Sosial Melalui Layanan Meja Live Casino Real-Time 4 Kedewasaan Sikap untuk Keberlanjutan Budaya Rekreasi Digital yang Sehat Metamorfosis Seni Ilustrasi dan Narasi Tematis Gulungan Interaktif[edit | edit source] Evolusi permainan slot dari format mekanis konvensional menuju bentuk digital terintegrasi telah membuka ruang kreativitas yang luar biasa luas bagi para perancang permainan global. Fokus utama pengembangan kini tidak lagi terbatas pada urutan matematika sederhana, melainkan berpusat pada cara membangun narasi cerita yang mendalam dan mengikat emosi pemain secara positif di sepanjang jalannya permainan. Kolaborasi antara ilustrator digital, animator tiga dimensi, dan penata suara kelas dunia melahirkan karya rekreasi visual yang menakjubkan, membawa pengguna melintasi ruang dan waktu menuju era peradaban kuno penuh misteri atau menjelajahi galaksi futuristik dengan dekorasi fiksi ilmiah yang memukau. Setiap transisi gambar dirancang dengan tingkat kehalusan yang tinggi, memastikan tidak ada jeda visual yang mengganggu kenyamanan mata selama gulungan virtual berputar di layar. Efek kejut yang menyenangkan yang muncul melalui animasi sinematik saat fitur bonus terpicu memberikan penghargaan estetika yang tinggi bagi para pemain gawai. Pendekatan berbasis seni interaktif ini berhasil mendefinisikan ulang esensi permainan ketangkasan modern, mengubah citra lamanya menjadi sebuah bentuk apresiasi terhadap karya seni digital kontemporer yang dinamis, menghibur, dan kaya akan nilai estetika tinggi yang memanjakan panca indera secara simultan. Transparansi Sistem Sebagai Standardisasi Keadilan Mekanis yang Mutakhir[edit | edit source] Di balik kemegahan presentasi visual dan efek suara dramatis yang memanjakan mata di permukaan layar gawai, aspek paling fundamental yang menopang keberlanjutan sebuah platform kasino siber adalah kejujuran sistem penggerak di latar belakang. Hubungan jangka panjang yang harmonis antara pengguna dan penyedia layanan hanya dapat terwujud jika platform mampu membuktikan transparansi mutlak dari algoritma generator angka acak yang digukannya. Sistem komputasi canggih ini memastikan bahwa setiap hasil dari putaran roda, pembagian kartu, maupun pergerakan simbol murni bersifat independen, acak, dan bebas dari segala bentuk intervensi pihak luar maupun internal. Standardisasi mekanis yang ketat serta keterlibatan lembaga audit independen internasional untuk menguji sistem secara berkala menjadi jaminan bahwa setiap pemain berdiri di atas lapangan yang sama rata dalam menguji keberuntungan dan strategi mereka. Ketenangan pikiran yang lahir dari lingkungan bermain yang adil dan jujur ini memberikan dampak psikologis yang sangat positif. Para pengguna dapat menikmati jalannya rekreasi dengan rasa percaya diri yang penuh, menerima setiap hasil sebagai bagian dari dinamika permainan yang wajar, sportif, dan menyenangkan tanpa ada rasa cemas akan manipulasi sistem. Rekonstruksi Atmosfer Sosial Melalui Layanan Meja Live Casino Real-Time[edit | edit source] Migrasi aktivitas rekreasi konvensional ke ruang siber sering kali dihadapkan pada tantangan hilangnya kehangatan interaksi sosial antarmanusia sebagaimana yang biasa ditemukan pada gedung fisik. Namun, implementasi teknologi penyiaran video langsung berkecepatan tinggi kini telah berhasil menjembatani jurang pemisah tersebut secara sangat anggun melalui format live casino interaktif. Pemain kini dapat terhubung secara real-time dengan studio khusus, mengambil tempat secara virtual di meja permainan kartu atau roda putar klasik, dan menyaksikan seluruh proses permainan yang dipandu secara profesional oleh pembawa acara dengan ketangkasan tinggi. Kehadiran elemen interaksi manusia secara langsung ini mengembalikan dimensi sosial yang sempat hilang pada era awal permainan siber, mengubah aktivitas bermain yang semula bersifat soliter menjadi sebuah pengalaman komunal yang dinamis dan hidup. Kemampuan untuk menyaksikan setiap detail pergerakan tanpa adanya jeda waktu tidak hanya melipatgandakan ketegangan positif yang otentik, tetapi juga memperkuat rasa percaya pengguna terhadap integritas mekanis yang sedang berjalan. Ruang sosial virtual ini membuktikan bahwa teknologi modern mampu melestarikan esensi dari permainan meja tradisional ke dalam wadah yang lebih praktis, aman, dan inklusif bagi siapa saja tanpa terkendala batasan geografis. Kedewasaan Sikap untuk Keberlanjutan Budaya Rekreasi Digital yang Sehat[edit | edit source] Menikmati pesona dunia kasino online secara maksimal dan berkesinambungan menuntut pemahaman yang matang mengenai esensi dari sebuah hiburan itu sendiri dari setiap individu yang terlibat. Ruang virtual ini sejatinya dirancang sebagai wadah untuk menyegarkan pikiran, menyalurkan hobi, dan melepaskan penat dari stres kerja harian, bukan sebagai instrumen finansial untuk mencari nafkah utama atau menyelesaikan problematika ekonomi pribadi. Karakter seorang pengguna yang cerdas dicerminkan dari disiplin diri yang kuat dalam menetapkan batasan waktu bermain serta ketegasan dalam mengelola alokasi dana hiburan secara bijaksana. Ketika aktivitas ini disikapi dengan kedewasaan berpikir dan kontrol diri yang kokoh, setiap sesi kunjungan ke ruang permainan akan selalu menyisakan pengalaman yang menyenangkan dan kepuasan batin yang positif tanpa mengganggu stabilitas kehidupan nyata. Ekosistem hiburan digital yang sehat membutuhkan kontribusi seimbang dari kedua belah pihak, yaitu penyedia layanan yang konsisten menyediakan teknologi jujur serta pengguna yang memiliki kesadaran rekreasi yang bertanggung jawab. Melalui sinergi harmonis ini, industri kasino virtual akan terus bertransformasi menjadi sarana rekreasi modern yang bernilai estetika tinggi, aman, dan senantiasa relevan dengan gaya hidup masyarakat digital yang dinamis.] 17:00:12 391786 AIClient - Response from AI: Yes 17:22:02 392417 PublicationImportJob - prompt for AI: [SYSTEM-LIKE INSTRUCTIONS] You are a highly conservative scientific information extractor and formatter. Your primary goal is factual fidelity to the attached article. You must extract only what is explicitly supported by the article. Never guess, reconstruct, or “complete” missing scientific data from general chemistry knowledge. When a value is unclear, ambiguous, inconsistent, or not explicitly stated, output "not reported". Core extraction policy: - Correctness is more important than completeness. - Unit normalization must be exact. - Never confuse catalyst, photosensitizer, sacrificial electron donor, solvent, additive, proton source, irradiation wavelength, or product metric. - Values should only be converted when the article provides a clear and scientifically reliable basis for conversion. - Never infer absolute concentrations from mol% unless the absolute concentration is explicitly stated. - Never infer TON CO from yield, selectivity, graph shape, or discussion text unless the TON CO value itself is explicitly reported or unambiguously readable. - Never replace a wavelength range with a single wavelength. - Never merge data across figures, tables, or sections unless the article clearly shows that they refer to the same experiment. - Never include bibliographic metadata in the output. Formatting policy: - Follow the requested section titles exactly. - Output only the requested final formatted content. - Use "not reported" for unsupported entries. - Do not mention uncertainty analysis, self-checking, or extraction workflow in the final answer. Before finalizing, silently verify: - catalyst concentration is in µM - photosensitizer concentration is in mM - electron donor concentration is in M - excitation wavelength is in nm - TON CO refers only to CO - no unsupported claim has been added - no bibliographic metadata is present [TASK] Read the attached scientific article and convert it into a structured educational chemistry wiki entry about a molecular photocatalytic CO2 reduction system. TASK Produce a scientifically accurate, teaching-oriented summary in MediaWiki format for advanced undergraduate chemistry students. Focus strictly on the chemistry, mechanism, photocatalytic setup, components, and reported results. CONTENT RESTRICTIONS - Use only information explicitly supported by the attached article. - Do NOT include author names, affiliations, journal name, year, DOI, citation labels, references, page numbers, or any publication metadata. - Do NOT speculate. - Do NOT fill missing values from chemical intuition or standard literature practice. - Whenever a requested value is missing, ambiguous, or not explicitly reported, write: "not reported". STYLE REQUIREMENTS - Use proper MediaWiki markup. - Use accessible but precise scientific language. - Keep the explanation educational, technically correct, and chemically specific. - Avoid unnecessary jargon, but do not oversimplify. - Distinguish clearly between established experimental observations and proposed mechanistic interpretation. OUTPUT REQUIREMENTS - Return only the final MediaWiki-formatted entry. - Use exactly the section headings below, in exactly the same order. - Do not add extra sections. - The final section, "Investigation", must contain CSV data inside a plain fenced code block. Use exactly this structure: == Abstract Summary == Provide a concise overview of the scientific goal, the photocatalytic system, and the main findings. State what was converted, what kind of photocatalytic system was used, and what the main outcome was. == Advances and Special Progress == Explain the key scientific advances compared with earlier molecular photocatalytic CO2 reduction systems. Focus on scientifically meaningful progress such as: - higher activity, - improved CO selectivity, - improved compatibility with water or mixed solvents, - unusual catalyst design, - mechanistic insight, - improved durability, - use of earth-abundant components, - unusual electron-transfer design, - better coupling between catalyst and photosensitizer. Only mention advances that are supported by the article itself. == Additional Remarks == Provide important contextual remarks relevant to the chemistry and significance of the work. Examples may include: - sustainability relevance of CO2-to-CO photoreduction, - strengths and limitations of sacrificial photochemical systems, - dependence on noble-metal photosensitizers, - solvent limitations, - water tolerance, - competition with H2 evolution, - catalyst decomposition, - low long-term durability, - mechanistic elegance versus practical limitations. Keep this section balanced, factual, and chemically relevant. == Content of the Published Article in Detail == Write a clear, teaching-oriented explanation of the scientific content of the article. Include, where supported by the article: - the molecular components of the system, - how the photocatalytic experiment is set up, - what happens after light absorption by the photosensitizer, - whether reductive or oxidative quenching is proposed, - how the sacrificial electron donor participates, - how electrons are transferred to the catalyst, - what reduced catalyst states are proposed or observed, - how CO2 activation and reduction are described, - how CO is formed and released, - whether proton transfer is involved, - what side products are observed or suppressed, - what control experiments or spectroscopic/electrochemical studies support the mechanism. Mechanistic explanation rules: - Explain the mechanism in words. - Be chemically accurate. - Distinguish proposed intermediates from directly observed intermediates. - Use cautious wording where appropriate, such as "the article proposes" or "the data support". - Do not overstate mechanistic certainty. Possible supporting evidence may include: - Stern-Volmer quenching, - emission quenching, - transient absorption, - UV/Vis spectroscopy, - cyclic voltammetry, - spectroelectrochemistry, - control experiments omitting one component, - atmosphere controls, - product analysis, - catalyst comparison studies. == Catalyst == Describe the catalyst in a compact but chemically informative way. Include only details explicitly supported by the article, such as: - exact catalyst identity, - catalyst class, - metal center, - oxidation state if stated, - ligand family or coordination environment, - whether it is mononuclear, dinuclear, supramolecular, macrocyclic, polypyridyl, porphyrinic, or another named class, - whether it is molecular, immobilized, or heterogeneous, - catalytic role in CO2 reduction, - special redox or structural properties relevant to function, - selectivity-related features, - stability or decomposition issues relevant to performance. Do not invent structural details beyond what the article actually states or names. == Photosensitizer == Describe the photosensitizer in the same style. Include only details explicitly supported by the article, such as: - exact identity, - photosensitizer class, - light-harvesting role, - excited-state function, - whether it undergoes reductive or oxidative quenching, - relevant redox or photophysical properties if explicitly discussed, - why it is suitable in this system, - any stability or photobleaching issues if reported. If multiple photosensitizers are compared, identify the main one clearly and mention others only when relevant data are reported. == Investigation == Provide the core photocatalytic experiments as ONE fenced code block that starts with ```csv and ends with ```. The block must be plain CSV — no markdown table, no JSON, no text before or after it inside the block. The header row MUST be EXACTLY these columns, in this order: catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Extraction rules for the CSV: - One row per distinct experimental condition explicitly reported. Take the main photocatalytic performance table first, and add control / condition-variation rows when they are explicitly reported. Include EVERY distinct experiment — do not summarise or collapse rows. - Report numbers as bare values (no unit text) in exactly these units, converting only when the article gives a clear basis: cat conc = µM; PS conc = mM; e-D conc = M; H-D conc = M; Temperature = °C; λexc = nm; irr time = h; Turnover_frequency__* = h^-1; Quantum_yield__* = %. - catalyst, PS (photosensitizer), e-D (sacrificial electron donor), H-D (hydrogen/proton donor): use the identity (name or abbreviation) exactly as given in the article. Keep names consistent across rows. Never swap catalyst, photosensitizer, electron donor, hydrogen donor, solvent, or additive. - Turnover_number__X, Turnover_frequency__X, Quantum_yield__X are per product X (CO, CH4, H2, HCOOH). Put each product's value in its own column; never substitute CO yield, selectivity, total TON, or a value read from a graph. - For a solvent mixture, give solvent A/B/C and the ratio in solvent-ratio (for example 4:1). Keep additives out of the solvent fields. - Keep a wavelength range as a range (for example 420-650); a monochromatic source is a single nm value. - Leave a cell EMPTY only when the article does not state the value. Never invent, guess, reconstruct, or infer a value from general knowledge, figures, or discussion — every value must be explicitly supported by the article. - Do NOT use a value that appears only in the supporting information unless the main text also states it. - Never put a comma inside a cell (commas separate columns); use a space or a slash instead. - Do not add, remove, rename, or reorder columns. Before output, silently verify: section headings match exactly; no bibliographic metadata; units are as specified above; catalyst and photosensitizer are not swapped; no unsupported value was added; one row per distinct experiment. Return only the final MediaWiki entry with the CSV code block in the Investigation section. 17:22:04 392417 AIClient - Uploaded file: 1-s2.0-S0021951726000072-main_6a26cf7d580a3.pdf, id: file-PQ4kSRHmBsQhJfXwFe6HZm 17:22:04 392417 AIClient - Request to AI with prompt: '[SYSTEM-LIKE INSTRUCTIONS] You are a highly conservative scientific information extractor and formatter. Your primary goal is factual fidelity to the attached article. You must extract only what is explicitly supported by the article. Never guess, reconstruct, or “complete” missing scientific data from general chemistry knowledge. When a value is unclear, ambiguous, inconsistent, or not explicitly stated, output "not reported". Core extraction policy: - Correctness is more important than completeness. - Unit normalization must be exact. - Never confuse catalyst, photosensitizer, sacrificial electron donor, solvent, additive, proton source, irradiation wavelength, or product metric. - Values should only be converted when the article provides a clear and scientifically reliable basis for conversion. - Never infer absolute concentrations from mol% unless the absolute concentration is explicitly stated. - Never infer TON CO from yield, selectivity, graph shape, or discussion text unless the TON CO value itself is explicitly reported or unambiguously readable. - Never replace a wavelength range with a single wavelength. - Never merge data across figures, tables, or sections unless the article clearly shows that they refer to the same experiment. - Never include bibliographic metadata in the output. Formatting policy: - Follow the requested section titles exactly. - Output only the requested final formatted content. - Use "not reported" for unsupported entries. - Do not mention uncertainty analysis, self-checking, or extraction workflow in the final answer. Before finalizing, silently verify: - catalyst concentration is in µM - photosensitizer concentration is in mM - electron donor concentration is in M - excitation wavelength is in nm - TON CO refers only to CO - no unsupported claim has been added - no bibliographic metadata is present [TASK] Read the attached scientific article and convert it into a structured educational chemistry wiki entry about a molecular photocatalytic CO2 reduction system. TASK Produce a scientifically accurate, teaching-oriented summary in MediaWiki format for advanced undergraduate chemistry students. Focus strictly on the chemistry, mechanism, photocatalytic setup, components, and reported results. CONTENT RESTRICTIONS - Use only information explicitly supported by the attached article. - Do NOT include author names, affiliations, journal name, year, DOI, citation labels, references, page numbers, or any publication metadata. - Do NOT speculate. - Do NOT fill missing values from chemical intuition or standard literature practice. - Whenever a requested value is missing, ambiguous, or not explicitly reported, write: "not reported". STYLE REQUIREMENTS - Use proper MediaWiki markup. - Use accessible but precise scientific language. - Keep the explanation educational, technically correct, and chemically specific. - Avoid unnecessary jargon, but do not oversimplify. - Distinguish clearly between established experimental observations and proposed mechanistic interpretation. OUTPUT REQUIREMENTS - Return only the final MediaWiki-formatted entry. - Use exactly the section headings below, in exactly the same order. - Do not add extra sections. - The final section, "Investigation", must contain CSV data inside a plain fenced code block. Use exactly this structure: == Abstract Summary == Provide a concise overview of the scientific goal, the photocatalytic system, and the main findings. State what was converted, what kind of photocatalytic system was used, and what the main outcome was. == Advances and Special Progress == Explain the key scientific advances compared with earlier molecular photocatalytic CO2 reduction systems. Focus on scientifically meaningful progress such as: - higher activity, - improved CO selectivity, - improved compatibility with water or mixed solvents, - unusual catalyst design, - mechanistic insight, - improved durability, - use of earth-abundant components, - unusual electron-transfer design, - better coupling between catalyst and photosensitizer. Only mention advances that are supported by the article itself. == Additional Remarks == Provide important contextual remarks relevant to the chemistry and significance of the work. Examples may include: - sustainability relevance of CO2-to-CO photoreduction, - strengths and limitations of sacrificial photochemical systems, - dependence on noble-metal photosensitizers, - solvent limitations, - water tolerance, - competition with H2 evolution, - catalyst decomposition, - low long-term durability, - mechanistic elegance versus practical limitations. Keep this section balanced, factual, and chemically relevant. == Content of the Published Article in Detail == Write a clear, teaching-oriented explanation of the scientific content of the article. Include, where supported by the article: - the molecular components of the system, - how the photocatalytic experiment is set up, - what happens after light absorption by the photosensitizer, - whether reductive or oxidative quenching is proposed, - how the sacrificial electron donor participates, - how electrons are transferred to the catalyst, - what reduced catalyst states are proposed or observed, - how CO2 activation and reduction are described, - how CO is formed and released, - whether proton transfer is involved, - what side products are observed or suppressed, - what control experiments or spectroscopic/electrochemical studies support the mechanism. Mechanistic explanation rules: - Explain the mechanism in words. - Be chemically accurate. - Distinguish proposed intermediates from directly observed intermediates. - Use cautious wording where appropriate, such as "the article proposes" or "the data support". - Do not overstate mechanistic certainty. Possible supporting evidence may include: - Stern-Volmer quenching, - emission quenching, - transient absorption, - UV/Vis spectroscopy, - cyclic voltammetry, - spectroelectrochemistry, - control experiments omitting one component, - atmosphere controls, - product analysis, - catalyst comparison studies. == Catalyst == Describe the catalyst in a compact but chemically informative way. Include only details explicitly supported by the article, such as: - exact catalyst identity, - catalyst class, - metal center, - oxidation state if stated, - ligand family or coordination environment, - whether it is mononuclear, dinuclear, supramolecular, macrocyclic, polypyridyl, porphyrinic, or another named class, - whether it is molecular, immobilized, or heterogeneous, - catalytic role in CO2 reduction, - special redox or structural properties relevant to function, - selectivity-related features, - stability or decomposition issues relevant to performance. Do not invent structural details beyond what the article actually states or names. == Photosensitizer == Describe the photosensitizer in the same style. Include only details explicitly supported by the article, such as: - exact identity, - photosensitizer class, - light-harvesting role, - excited-state function, - whether it undergoes reductive or oxidative quenching, - relevant redox or photophysical properties if explicitly discussed, - why it is suitable in this system, - any stability or photobleaching issues if reported. If multiple photosensitizers are compared, identify the main one clearly and mention others only when relevant data are reported. == Investigation == Provide the core photocatalytic experiments as ONE fenced code block that starts with ```csv and ends with ```. The block must be plain CSV — no markdown table, no JSON, no text before or after it inside the block. The header row MUST be EXACTLY these columns, in this order: catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Extraction rules for the CSV: - One row per distinct experimental condition explicitly reported. Take the main photocatalytic performance table first, and add control / condition-variation rows when they are explicitly reported. Include EVERY distinct experiment — do not summarise or collapse rows. - Report numbers as bare values (no unit text) in exactly these units, converting only when the article gives a clear basis: cat conc = µM; PS conc = mM; e-D conc = M; H-D conc = M; Temperature = °C; λexc = nm; irr time = h; Turnover_frequency__* = h^-1; Quantum_yield__* = %. - catalyst, PS (photosensitizer), e-D (sacrificial electron donor), H-D (hydrogen/proton donor): use the identity (name or abbreviation) exactly as given in the article. Keep names consistent across rows. Never swap catalyst, photosensitizer, electron donor, hydrogen donor, solvent, or additive. - Turnover_number__X, Turnover_frequency__X, Quantum_yield__X are per product X (CO, CH4, H2, HCOOH). Put each product's value in its own column; never substitute CO yield, selectivity, total TON, or a value read from a graph. - For a solvent mixture, give solvent A/B/C and the ratio in solvent-ratio (for example 4:1). Keep additives out of the solvent fields. - Keep a wavelength range as a range (for example 420-650); a monochromatic source is a single nm value. - Leave a cell EMPTY only when the article does not state the value. Never invent, guess, reconstruct, or infer a value from general knowledge, figures, or discussion — every value must be explicitly supported by the article. - Do NOT use a value that appears only in the supporting information unless the main text also states it. - Never put a comma inside a cell (commas separate columns); use a space or a slash instead. - Do not add, remove, rename, or reorder columns. Before output, silently verify: section headings match exactly; no bibliographic metadata; units are as specified above; catalyst and photosensitizer are not swapped; no unsupported value was added; one row per distinct experiment. Return only the final MediaWiki entry with the CSV code block in the Investigation section.' and documents [file-PQ4kSRHmBsQhJfXwFe6HZm] 17:23:15 392417 AIClient - Response from AI: == Abstract Summary == This article describes a homogeneous molecular photocatalytic system for reducing CO2 to CO under visible light using iron(II) bis(pyrazolyl)phenanthroline complexes as catalysts. The catalytic system combines an Fe(II) molecular catalyst, [Ru(bpy)3]2+ as photosensitizer, BIH as sacrificial electron donor, and mixed MeCN/H2O solvent under CO2. All four iron complexes were active for CO formation. The best overall catalyst under the standard screening conditions was Fe2, which reached a turnover number for CO of 1318 with 84% CO selectivity. At lower catalyst loading, Fe2 reached a much higher turnover number for CO of 23,138 and CO selectivity up to 91%. The study also showed that moderate water content was essential for efficient catalysis, that the catalysis remained homogeneous under the tested conditions, and that deactivation was mainly associated with deterioration of the photosensitizer rather than loss of the iron catalyst. == Advances and Special Progress == The article presents several advances supported by the reported data: * '''New catalyst platform''': It introduces a new family of Fe(II) bis(pyrazolyl)phenanthroline complexes for visible-light-driven homogeneous CO2-to-CO reduction. * '''Earth-abundant catalytic metal''': The catalytic center is iron, which is an earth-abundant metal. * '''High activity at low catalyst loading''': Fe2 reached a turnover number for CO of 23,138 at 3.12 μM catalyst loading. * '''High CO selectivity''': CO selectivity reached up to 91% for Fe4 under the catalyst comparison conditions and up to 91% for Fe2 under low-loading conditions. * '''Water-compatible operation''': The system operates in MeCN/H2O mixtures, and 7.5-10% water gave the best performance. * '''Mechanistic insight from multiple methods''': The article combines UV/Vis spectroscopy, DFT, TD-DFT, cyclic voltammetry, control experiments, mercury poisoning tests, and Stern-Volmer quenching measurements to analyze catalyst behavior and likely electron-transfer pathways. * '''Evidence for homogeneous catalysis''': Control experiments and Hg poisoning tests supported a homogeneous molecular catalytic system rather than nanoparticle-based catalysis. * '''Durability insight''': The article attributes loss of activity mainly to photosensitizer degradation, while concluding that Fe2 is comparatively robust under the reaction conditions. == Additional Remarks == Photocatalytic CO2-to-CO conversion is chemically important because CO is a useful feedstock for further synthesis. This work shows that molecular iron catalysts can perform this reaction efficiently in a sacrificial photochemical system under visible light. The system still depends on a ruthenium polypyridyl photosensitizer, so the overall photocatalytic assembly is not fully based on earth-abundant elements. It also requires BIH as a sacrificial donor, which is typical for mechanistic and catalyst-screening studies but limits direct practical application. The study clearly shows competition between CO formation and H2 evolution. Product selectivity depends strongly on catalyst structure, catalyst loading, and water content. Water is beneficial at moderate levels because it supports proton-coupled steps, but too much water lowers activity, which the article relates in part to poor BIH solubility. The article also highlights a common limitation of molecular photochemical systems: long-term activity is restricted by photosensitizer degradation. Even so, the iron catalyst itself is presented as comparatively robust, and the work emphasizes mechanistic understanding and catalyst design rather than device-level implementation. == Content of the Published Article in Detail == The photocatalytic system contains four key molecular components: * an Fe(II) bis(pyrazolyl)phenanthroline complex as the CO2-reduction catalyst, * [Ru(bpy)3]2+ as the photosensitizer, * BIH as the sacrificial electron donor, * a CO2-saturated MeCN/H2O reaction medium. The catalyst series consists of Fe1-Fe4, which differ in the substituents on the pyrazolyl groups. Under the standard comparison conditions, the catalyst concentration was 50 μM, the photosensitizer concentration was 0.3 mM, and BIH concentration was 0.11 M in 4 mL of CO2-saturated MeCN/H2O. Irradiation used blue light at 462 nm. === Molecular and electronic features of the catalysts === The article reports that all iron complexes are high-spin Fe(II) species with distorted octahedral geometries. The tetradentate bis(pyrazolyl)phenanthroline ligand binds the iron center, and two water molecules occupy axial positions. UV/Vis and TD-DFT analysis showed that the strong absorption bands in the ultraviolet region are mainly ligand-centered π-π* transitions. Weak low-energy bands near 450-480 nm were assigned to forbidden transitions. The article explicitly states that these optical data do not imply that the iron complexes themselves act as the photosensitizers in the photocatalytic system. Electrochemical measurements showed two reduction waves for the iron complexes. The article interprets these mainly as ligand-centered reductions rather than formal metal-centered Fe(II)/Fe(I)/Fe(0) processes, because DFT calculations indicate that the relevant low-lying unoccupied orbitals are largely ligand-based. === Photocatalytic experiment and product analysis === Photocatalytic reactions were carried out in a sealed borosilicate photoreactor containing catalyst, [Ru(bpy)3]2+, and BIH in CO2-saturated MeCN/H2O. After purging with CO2, the sample was irradiated with 462 nm light. Gas products in the headspace were quantified by gas chromatography. The main gaseous products were CO and H2. The article states that no significant amounts of formate or CH4 were detected. === Control experiments === Control experiments showed that no significant photocatalytic activity occurred when light, catalyst, photosensitizer, sacrificial donor, or CO2 was omitted. Replacing the defined iron complex with Fe(ClO4)2 gave only minor amounts of CO and H2, supporting the importance of the molecular catalyst structure. The article also reports mercury poisoning experiments. These gave essentially unchanged CO yields relative to mercury-free conditions, which the article interprets as evidence against catalysis by colloidal or nanoparticulate iron species. === Quenching and proposed electron-transfer sequence === The article combines DFT energy-level analysis with emission-quenching experiments to discuss the photoredox pathway. According to the reported interpretation, BIH can reductively quench the excited state of [Ru(bpy)3]2+. Stern-Volmer measurements showed that BIH quenches the photosensitizer much more efficiently than the iron complexes do. The quenching rate constant for BIH was reported to be on the order of 1010 M-1 s-1, whereas the values for Fe1-Fe4 were lower by about one order of magnitude. The article also states that oxidative quenching of the excited ruthenium photosensitizer by the iron complexes is energetically feasible based on frontier-orbital alignment, but the quenching data show BIH to be the dominant quencher in the catalytic mixture. Therefore, the mechanistic discussion supports reductive quenching by BIH as the main path under the reported conditions. === Catalyst reduction and CO2 activation === Electrochemical experiments were used to probe which catalyst reductions are accessible to the reduced photosensitizer. When the potential window was restricted to values accessible to reduced [Ru(bpy)3]+, the first reduction wave of the iron complexes was still observed. Under CO2, the cyclic voltammograms changed relative to argon, which the article interprets as evidence that singly reduced iron-complex-derived species react with CO2. Thus, the data support the proposal that single-electron reduction of the iron complex is sufficient to generate a catalytically competent reduced state for CO2 activation. Specific catalytic intermediates were not directly observed in this study, but the article discusses reduced species formed after ligand-centered reduction and proposes that these react with CO2. === Role of water and proton transfer === Water had a strong effect on reactivity. In dry MeCN, almost no CO was formed. Adding 7.5-10% water caused a major increase in both activity and CO selectivity. The article proposes that water is essential because proton-coupled electron transfer is required during CO2 reduction. It further states that water can stabilize key intermediates through hydrogen bonding and can act as the proton source. The article specifically discusses Fe-CO2 and Fe-COOH type intermediates as mechanistic possibilities. These are proposed intermediates, not directly observed species. According to the article, proton transfer helps convert coordinated CO2 into a reactive carboxyl-type intermediate, which then leads to CO release. === Catalyst comparison and structure-performance relationships === All four iron complexes were active, but their performance differed. * '''Fe2''' gave the highest CO turnover number under the standard comparison conditions. * '''Fe4''' gave the highest CO selectivity in the catalyst-comparison set. * '''Fe1''' and '''Fe3''' were less active. The article relates these differences to electronic effects of the pyrazolyl substituents, which alter reduction potentials, orbital distributions, and coordination features. For Fe4, the article also notes intramolecular H···F interactions involving CF3 substituents and coordinated water molecules in the calculated structure, and suggests that these may contribute to its high CO selectivity. === Time dependence and deactivation === For Fe2, CO and H2 production increased strongly during the first 24-48 h and then approached a plateau. The article attributes this deactivation mainly to photosensitizer deterioration rather than to complete loss of catalyst integrity. This interpretation is supported by the observation that adding additional [Ru(bpy)3]2+ after 24 h restored further CO production. Overall, the article presents a photocatalytic system in which visible light is harvested by [Ru(bpy)3]2+, BIH serves as the dominant reductive quencher, electrons are transferred to an Fe(II) molecular catalyst through accessible reduced states, CO2 reduction proceeds with participation of proton-transfer steps promoted by water, and CO is formed selectively over H2 under optimized conditions. == Catalyst == The catalysts are a series of molecular homogeneous iron(II) bis(pyrazolyl)phenanthroline complexes, identified as Fe1-Fe4. The article describes them as Fe(II) complexes bearing tetradentate bis(pyrazolyl)phenanthroline ligands with two coordinated water molecules, formulated as [Fe(bpzRphen)(H2O)2]X2 with different pyrazolyl substituents: * '''Fe1''': [Fe(bpzphen)(H2O)2](BF4)2 * '''Fe2''': [Fe(bpzMe2phen)(H2O)2](BF4)2 * '''Fe3''': [Fe(bpzPhphen)(H2O)2](ClO4)2 * '''Fe4''': [Fe(bpzCF3phen)(H2O)2](ClO4)2 These are mononuclear molecular catalysts. All were reported to have high-spin quintet ground states and distorted octahedral geometries. Their reduction processes were described as primarily ligand-centered. All four catalyze photocatalytic CO2-to-CO conversion, but Fe2 gave the highest activity under standard screening conditions, while Fe4 gave the highest CO selectivity among the four under those conditions. The article concludes that the catalytic system remains homogeneous during catalysis and that Fe2 is comparatively robust, with deactivation arising mainly from photosensitizer deterioration. == Photosensitizer == The photosensitizer is '''[Ru(bpy)3]2+''', used as [Ru(bpy)3]Cl2 in the experiments. It is a molecular ruthenium polypyridyl photosensitizer that absorbs the incident visible light and enters an excited state described in the article as a metal-to-ligand charge-transfer triplet excited state. The article discusses two possible quenching pathways for this excited state: * '''reductive quenching by BIH''', and * energetically feasible but less important '''oxidative quenching by the iron complexes'''. The Stern-Volmer data reported in the article show that BIH quenches the excited photosensitizer much more efficiently than Fe1-Fe4, supporting BIH as the dominant quencher under catalytic conditions. The reduced photosensitizer is then implicated in electron transfer to the iron catalyst. The article also reports that prolonged irradiation causes photosensitizer deterioration, and this is identified as the main reason for loss of catalytic activity over time. == Investigation == ```csv catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Fe1 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 987 , 41.1 , , , 187 , 7.8 , , , , H2O , Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 1318 , 54.9 , , , 243 , 10.1 , , , , H2O , Fe3 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 847 , 35.3 , , , 205 , 8.5 , , , , H2O , Fe4 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 1265 , 52.7 , , , 133 , 5.5 , , , , H2O , Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 4 , 311 , 77.7 , , , 51 , 12.8 , , , , H2O , Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 48 , 1578 , 32.9 , , , 296 , 6.2 , , , , H2O , Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 96 , 1593 , 16.6 , , , 300 , 3.1 , , , , H2O , Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , , , , , , CO2 , , , 35 , 462 , 24 , 2 , not reported , , , 22 , not reported , , , , , Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 1352 , 56.3 , , , 285 , 11.9 , , , , H2O , Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 661 , 27.5 , , , 191 , 8.0 , , , , H2O , Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 621 , 25.8 , , , 77 , 3.2 , , , , H2O , Fe2 , 25.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 2086 , 86.9 , , , 123 , 5.1 , , , , H2O , Fe2 , 12.5 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 4259 , 177.4 , , , 276 , 11.5 , , , , H2O , Fe2 , 6.25 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 10168 , 423.7 , , , 862 , 35.9 , , , , H2O , Fe2 , 3.12 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 23138 , 964.1 , , , 2177 , 90.7 , , , , H2O , Fe2 , 3.12 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 4 , 9754 , 2438 , 8.24 , , not reported , not reported , , , , H2O , ``` 18:24:02 394977 PublicationImportJob - prompt for AI: [SYSTEM-LIKE INSTRUCTIONS] You are a highly conservative scientific information extractor and formatter. Your primary goal is factual fidelity to the attached article. You must extract only what is explicitly supported by the article. Never guess, reconstruct, or “complete” missing scientific data from general chemistry knowledge. When a value is unclear, ambiguous, inconsistent, or not explicitly stated, output "not reported". Core extraction policy: - Correctness is more important than completeness. - Unit normalization must be exact. - Never confuse catalyst, photosensitizer, sacrificial electron donor, solvent, additive, proton source, irradiation wavelength, or product metric. - Values should only be converted when the article provides a clear and scientifically reliable basis for conversion. - Never infer absolute concentrations from mol% unless the absolute concentration is explicitly stated. - Never infer TON CO from yield, selectivity, graph shape, or discussion text unless the TON CO value itself is explicitly reported or unambiguously readable. - Never replace a wavelength range with a single wavelength. - Never merge data across figures, tables, or sections unless the article clearly shows that they refer to the same experiment. - Never include bibliographic metadata in the output. Formatting policy: - Follow the requested section titles exactly. - Output only the requested final formatted content. - Use "not reported" for unsupported entries. - Do not mention uncertainty analysis, self-checking, or extraction workflow in the final answer. Before finalizing, silently verify: - catalyst concentration is in µM - photosensitizer concentration is in mM - electron donor concentration is in M - excitation wavelength is in nm - TON CO refers only to CO - no unsupported claim has been added - no bibliographic metadata is present [TASK] Read the attached scientific article and convert it into a structured educational chemistry wiki entry about a molecular photocatalytic CO2 reduction system. TASK Produce a scientifically accurate, teaching-oriented summary in MediaWiki format for advanced undergraduate chemistry students. Focus strictly on the chemistry, mechanism, photocatalytic setup, components, and reported results. CONTENT RESTRICTIONS - Use only information explicitly supported by the attached article. - Do NOT include author names, affiliations, journal name, year, DOI, citation labels, references, page numbers, or any publication metadata. - Do NOT speculate. - Do NOT fill missing values from chemical intuition or standard literature practice. - Whenever a requested value is missing, ambiguous, or not explicitly reported, write: "not reported". STYLE REQUIREMENTS - Use proper MediaWiki markup. - Use accessible but precise scientific language. - Keep the explanation educational, technically correct, and chemically specific. - Avoid unnecessary jargon, but do not oversimplify. - Distinguish clearly between established experimental observations and proposed mechanistic interpretation. OUTPUT REQUIREMENTS - Return only the final MediaWiki-formatted entry. - Use exactly the section headings below, in exactly the same order. - Do not add extra sections. - The final section, "Investigation", must contain CSV data inside a plain fenced code block. Use exactly this structure: == Abstract Summary == Provide a concise overview of the scientific goal, the photocatalytic system, and the main findings. State what was converted, what kind of photocatalytic system was used, and what the main outcome was. == Advances and Special Progress == Explain the key scientific advances compared with earlier molecular photocatalytic CO2 reduction systems. Focus on scientifically meaningful progress such as: - higher activity, - improved CO selectivity, - improved compatibility with water or mixed solvents, - unusual catalyst design, - mechanistic insight, - improved durability, - use of earth-abundant components, - unusual electron-transfer design, - better coupling between catalyst and photosensitizer. Only mention advances that are supported by the article itself. == Additional Remarks == Provide important contextual remarks relevant to the chemistry and significance of the work. Examples may include: - sustainability relevance of CO2-to-CO photoreduction, - strengths and limitations of sacrificial photochemical systems, - dependence on noble-metal photosensitizers, - solvent limitations, - water tolerance, - competition with H2 evolution, - catalyst decomposition, - low long-term durability, - mechanistic elegance versus practical limitations. Keep this section balanced, factual, and chemically relevant. == Content of the Published Article in Detail == Write a clear, teaching-oriented explanation of the scientific content of the article. Include, where supported by the article: - the molecular components of the system, - how the photocatalytic experiment is set up, - what happens after light absorption by the photosensitizer, - whether reductive or oxidative quenching is proposed, - how the sacrificial electron donor participates, - how electrons are transferred to the catalyst, - what reduced catalyst states are proposed or observed, - how CO2 activation and reduction are described, - how CO is formed and released, - whether proton transfer is involved, - what side products are observed or suppressed, - what control experiments or spectroscopic/electrochemical studies support the mechanism. Mechanistic explanation rules: - Explain the mechanism in words. - Be chemically accurate. - Distinguish proposed intermediates from directly observed intermediates. - Use cautious wording where appropriate, such as "the article proposes" or "the data support". - Do not overstate mechanistic certainty. Possible supporting evidence may include: - Stern-Volmer quenching, - emission quenching, - transient absorption, - UV/Vis spectroscopy, - cyclic voltammetry, - spectroelectrochemistry, - control experiments omitting one component, - atmosphere controls, - product analysis, - catalyst comparison studies. == Catalyst == Describe the catalyst in a compact but chemically informative way. Include only details explicitly supported by the article, such as: - exact catalyst identity, - catalyst class, - metal center, - oxidation state if stated, - ligand family or coordination environment, - whether it is mononuclear, dinuclear, supramolecular, macrocyclic, polypyridyl, porphyrinic, or another named class, - whether it is molecular, immobilized, or heterogeneous, - catalytic role in CO2 reduction, - special redox or structural properties relevant to function, - selectivity-related features, - stability or decomposition issues relevant to performance. Do not invent structural details beyond what the article actually states or names. == Photosensitizer == Describe the photosensitizer in the same style. Include only details explicitly supported by the article, such as: - exact identity, - photosensitizer class, - light-harvesting role, - excited-state function, - whether it undergoes reductive or oxidative quenching, - relevant redox or photophysical properties if explicitly discussed, - why it is suitable in this system, - any stability or photobleaching issues if reported. If multiple photosensitizers are compared, identify the main one clearly and mention others only when relevant data are reported. == Investigation == Provide the core photocatalytic experiments as ONE fenced code block that starts with ```csv and ends with ```. The block must be plain CSV — no markdown table, no JSON, no text before or after it inside the block. The header row MUST be EXACTLY these columns, in this order: catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Extraction rules for the CSV: - One row per distinct experimental condition explicitly reported. Take the main photocatalytic performance table first, and add control / condition-variation rows when they are explicitly reported. Include EVERY distinct experiment — do not summarise or collapse rows. - Report numbers as bare values (no unit text) in exactly these units, converting only when the article gives a clear basis: cat conc = µM; PS conc = mM; e-D conc = M; H-D conc = M; Temperature = °C; λexc = nm; irr time = h; Turnover_frequency__* = h^-1; Quantum_yield__* = %. - catalyst, PS (photosensitizer), e-D (sacrificial electron donor), H-D (hydrogen/proton donor): use the identity (name or abbreviation) exactly as given in the article. Keep names consistent across rows. Never swap catalyst, photosensitizer, electron donor, hydrogen donor, solvent, or additive. - Turnover_number__X, Turnover_frequency__X, Quantum_yield__X are per product X (CO, CH4, H2, HCOOH). Put each product's value in its own column; never substitute CO yield, selectivity, total TON, or a value read from a graph. - For a solvent mixture, give solvent A/B/C and the ratio in solvent-ratio (for example 4:1). Keep additives out of the solvent fields. - Keep a wavelength range as a range (for example 420-650); a monochromatic source is a single nm value. - Leave a cell EMPTY only when the article does not state the value. Never invent, guess, reconstruct, or infer a value from general knowledge, figures, or discussion — every value must be explicitly supported by the article. - Do NOT use a value that appears only in the supporting information unless the main text also states it. - Never put a comma inside a cell (commas separate columns); use a space or a slash instead. - Do not add, remove, rename, or reorder columns. Before output, silently verify: section headings match exactly; no bibliographic metadata; units are as specified above; catalyst and photosensitizer are not swapped; no unsupported value was added; one row per distinct experiment. Return only the final MediaWiki entry with the CSV code block in the Investigation section. 18:24:04 394977 AIClient - Uploaded file: 1-s2.0-S0021951726000072-main_6a26cf7d580a3.pdf, id: file-HTYTmyhdYgnXub645yqKtj 18:24:04 394977 AIClient - Request to AI with prompt: '[SYSTEM-LIKE INSTRUCTIONS] You are a highly conservative scientific information extractor and formatter. Your primary goal is factual fidelity to the attached article. You must extract only what is explicitly supported by the article. Never guess, reconstruct, or “complete” missing scientific data from general chemistry knowledge. When a value is unclear, ambiguous, inconsistent, or not explicitly stated, output "not reported". Core extraction policy: - Correctness is more important than completeness. - Unit normalization must be exact. - Never confuse catalyst, photosensitizer, sacrificial electron donor, solvent, additive, proton source, irradiation wavelength, or product metric. - Values should only be converted when the article provides a clear and scientifically reliable basis for conversion. - Never infer absolute concentrations from mol% unless the absolute concentration is explicitly stated. - Never infer TON CO from yield, selectivity, graph shape, or discussion text unless the TON CO value itself is explicitly reported or unambiguously readable. - Never replace a wavelength range with a single wavelength. - Never merge data across figures, tables, or sections unless the article clearly shows that they refer to the same experiment. - Never include bibliographic metadata in the output. Formatting policy: - Follow the requested section titles exactly. - Output only the requested final formatted content. - Use "not reported" for unsupported entries. - Do not mention uncertainty analysis, self-checking, or extraction workflow in the final answer. Before finalizing, silently verify: - catalyst concentration is in µM - photosensitizer concentration is in mM - electron donor concentration is in M - excitation wavelength is in nm - TON CO refers only to CO - no unsupported claim has been added - no bibliographic metadata is present [TASK] Read the attached scientific article and convert it into a structured educational chemistry wiki entry about a molecular photocatalytic CO2 reduction system. TASK Produce a scientifically accurate, teaching-oriented summary in MediaWiki format for advanced undergraduate chemistry students. Focus strictly on the chemistry, mechanism, photocatalytic setup, components, and reported results. CONTENT RESTRICTIONS - Use only information explicitly supported by the attached article. - Do NOT include author names, affiliations, journal name, year, DOI, citation labels, references, page numbers, or any publication metadata. - Do NOT speculate. - Do NOT fill missing values from chemical intuition or standard literature practice. - Whenever a requested value is missing, ambiguous, or not explicitly reported, write: "not reported". STYLE REQUIREMENTS - Use proper MediaWiki markup. - Use accessible but precise scientific language. - Keep the explanation educational, technically correct, and chemically specific. - Avoid unnecessary jargon, but do not oversimplify. - Distinguish clearly between established experimental observations and proposed mechanistic interpretation. OUTPUT REQUIREMENTS - Return only the final MediaWiki-formatted entry. - Use exactly the section headings below, in exactly the same order. - Do not add extra sections. - The final section, "Investigation", must contain CSV data inside a plain fenced code block. Use exactly this structure: == Abstract Summary == Provide a concise overview of the scientific goal, the photocatalytic system, and the main findings. State what was converted, what kind of photocatalytic system was used, and what the main outcome was. == Advances and Special Progress == Explain the key scientific advances compared with earlier molecular photocatalytic CO2 reduction systems. Focus on scientifically meaningful progress such as: - higher activity, - improved CO selectivity, - improved compatibility with water or mixed solvents, - unusual catalyst design, - mechanistic insight, - improved durability, - use of earth-abundant components, - unusual electron-transfer design, - better coupling between catalyst and photosensitizer. Only mention advances that are supported by the article itself. == Additional Remarks == Provide important contextual remarks relevant to the chemistry and significance of the work. Examples may include: - sustainability relevance of CO2-to-CO photoreduction, - strengths and limitations of sacrificial photochemical systems, - dependence on noble-metal photosensitizers, - solvent limitations, - water tolerance, - competition with H2 evolution, - catalyst decomposition, - low long-term durability, - mechanistic elegance versus practical limitations. Keep this section balanced, factual, and chemically relevant. == Content of the Published Article in Detail == Write a clear, teaching-oriented explanation of the scientific content of the article. Include, where supported by the article: - the molecular components of the system, - how the photocatalytic experiment is set up, - what happens after light absorption by the photosensitizer, - whether reductive or oxidative quenching is proposed, - how the sacrificial electron donor participates, - how electrons are transferred to the catalyst, - what reduced catalyst states are proposed or observed, - how CO2 activation and reduction are described, - how CO is formed and released, - whether proton transfer is involved, - what side products are observed or suppressed, - what control experiments or spectroscopic/electrochemical studies support the mechanism. Mechanistic explanation rules: - Explain the mechanism in words. - Be chemically accurate. - Distinguish proposed intermediates from directly observed intermediates. - Use cautious wording where appropriate, such as "the article proposes" or "the data support". - Do not overstate mechanistic certainty. Possible supporting evidence may include: - Stern-Volmer quenching, - emission quenching, - transient absorption, - UV/Vis spectroscopy, - cyclic voltammetry, - spectroelectrochemistry, - control experiments omitting one component, - atmosphere controls, - product analysis, - catalyst comparison studies. == Catalyst == Describe the catalyst in a compact but chemically informative way. Include only details explicitly supported by the article, such as: - exact catalyst identity, - catalyst class, - metal center, - oxidation state if stated, - ligand family or coordination environment, - whether it is mononuclear, dinuclear, supramolecular, macrocyclic, polypyridyl, porphyrinic, or another named class, - whether it is molecular, immobilized, or heterogeneous, - catalytic role in CO2 reduction, - special redox or structural properties relevant to function, - selectivity-related features, - stability or decomposition issues relevant to performance. Do not invent structural details beyond what the article actually states or names. == Photosensitizer == Describe the photosensitizer in the same style. Include only details explicitly supported by the article, such as: - exact identity, - photosensitizer class, - light-harvesting role, - excited-state function, - whether it undergoes reductive or oxidative quenching, - relevant redox or photophysical properties if explicitly discussed, - why it is suitable in this system, - any stability or photobleaching issues if reported. If multiple photosensitizers are compared, identify the main one clearly and mention others only when relevant data are reported. == Investigation == Provide the core photocatalytic experiments as ONE fenced code block that starts with ```csv and ends with ```. The block must be plain CSV — no markdown table, no JSON, no text before or after it inside the block. The header row MUST be EXACTLY these columns, in this order: catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Extraction rules for the CSV: - One row per distinct experimental condition explicitly reported. Take the main photocatalytic performance table first, and add control / condition-variation rows when they are explicitly reported. Include EVERY distinct experiment — do not summarise or collapse rows. - Report numbers as bare values (no unit text) in exactly these units, converting only when the article gives a clear basis: cat conc = µM; PS conc = mM; e-D conc = M; H-D conc = M; Temperature = °C; λexc = nm; irr time = h; Turnover_frequency__* = h^-1; Quantum_yield__* = %. - catalyst, PS (photosensitizer), e-D (sacrificial electron donor), H-D (hydrogen/proton donor): use the identity (name or abbreviation) exactly as given in the article. Keep names consistent across rows. Never swap catalyst, photosensitizer, electron donor, hydrogen donor, solvent, or additive. - Turnover_number__X, Turnover_frequency__X, Quantum_yield__X are per product X (CO, CH4, H2, HCOOH). Put each product's value in its own column; never substitute CO yield, selectivity, total TON, or a value read from a graph. - For a solvent mixture, give solvent A/B/C and the ratio in solvent-ratio (for example 4:1). Keep additives out of the solvent fields. - Keep a wavelength range as a range (for example 420-650); a monochromatic source is a single nm value. - Leave a cell EMPTY only when the article does not state the value. Never invent, guess, reconstruct, or infer a value from general knowledge, figures, or discussion — every value must be explicitly supported by the article. - Do NOT use a value that appears only in the supporting information unless the main text also states it. - Never put a comma inside a cell (commas separate columns); use a space or a slash instead. - Do not add, remove, rename, or reorder columns. Before output, silently verify: section headings match exactly; no bibliographic metadata; units are as specified above; catalyst and photosensitizer are not swapped; no unsupported value was added; one row per distinct experiment. Return only the final MediaWiki entry with the CSV code block in the Investigation section.' and documents [file-HTYTmyhdYgnXub645yqKtj] 18:25:11 394977 AIClient - Response from AI: == Abstract Summary == This article describes a homogeneous molecular photocatalytic system for the visible-light reduction of CO2 to CO using iron(II) bis(pyrazolyl)phenanthroline complexes as catalysts. The catalytic mixtures used an iron complex, [Ru(bpy)3]2+ as photosensitizer, and BIH as sacrificial electron donor in CO2-saturated MeCN/H2O. All four iron complexes were active for CO formation. The best overall catalyst under the standard conditions was Fe2, which gave a turnover number for CO of 1318 with 84% CO selectivity after 24 h. At lower catalyst loading, Fe2 reached a much higher turnover number for CO of 23,138. Fe4 gave the highest reported CO selectivity in the catalyst series under the standard comparison conditions, reaching 91%. Mechanistic and control experiments supported homogeneous photocatalysis and indicated that water, reductive quenching of the photosensitizer by BIH, and ligand-centered reduction of the iron complexes are important features of the system. == Advances and Special Progress == The article reports several advances for a molecular CO2 photoreduction system based on an earth-abundant catalyst metal. * '''New catalyst family:''' The work introduces iron(II) complexes supported by bis(pyrazolyl)phenanthroline ligands as photocatalysts for CO2-to-CO conversion. The article presents this ligand platform as previously underexplored for this reaction. * '''High activity with an iron catalyst:''' Under optimized low-catalyst-loading conditions, Fe2 reached a TONCO of 23,138. The article identifies this as being among the higher values reported for homogeneous Fe-based photocatalysts. * '''High CO selectivity:''' Fe4 gave 91% CO selectivity under the standard catalyst comparison conditions, and Fe2 reached up to 94% CO selectivity at lower catalyst concentration. * '''Water-compatible operation:''' The system operates in mixed MeCN/H2O, and the article shows that 7.5–10% water is important for efficient CO2 reduction. This mixed-solvent tolerance is chemically important because proton transfer is required for catalysis. * '''Mechanistic insight from combined methods:''' The study combines UV/Vis spectroscopy, emission quenching, cyclic voltammetry, DFT, and control experiments. These data support reductive quenching of the ruthenium photosensitizer by BIH, ligand-centered reduction of the iron complexes, and activation of catalysis after one-electron reduction of the iron complex. * '''Evidence for homogeneous catalysis and catalyst robustness:''' Mercury poisoning experiments did not suppress activity, which supports a homogeneous molecular mechanism rather than nanoparticle-mediated catalysis. The article concludes that deactivation mainly comes from photosensitizer deterioration rather than rapid destruction of the iron catalyst. == Additional Remarks == Photocatalytic conversion of CO2 to CO is chemically significant because CO is a useful feedstock. In this system, the catalyst metal is iron, which is earth-abundant, but the photosensitizer is [Ru(bpy)3]2+, so the full system is not based entirely on abundant elements. The study uses a sacrificial photochemical setup with BIH as electron donor. This is useful for mechanistic study and catalyst benchmarking, but it also means the system depends on consumption of a sacrificial reagent rather than closed-cycle solar fuel production. A key chemical feature is the competition between CO2 reduction and H2 evolution. The iron complexes favor CO formation under the reported conditions, but H2 is still formed as a side product. Water is necessary for efficient catalysis, yet too much water lowers activity, which the article attributes in part to the poor solubility of BIH in more aqueous media. The article also identifies a practical limitation: long-term performance is limited mainly by photodegradation of the ruthenium photosensitizer. Thus, the catalyst itself is described as relatively robust, but the overall photochemical system still suffers from photosensitizer instability. == Content of the Published Article in Detail == The study examines four molecular iron(II) complexes, Fe1–Fe4, based on tetradentate bis(pyrazolyl)phenanthroline ligands. The pyrazolyl substituents were varied to tune electronic and steric properties: H, dimethyl, diphenyl, and CF3. The article reports that all complexes are high-spin iron(II) species with distorted octahedral geometries, in which the tetradentate ligand binds the iron center and two water molecules occupy axial positions. The photocatalytic experiments were carried out in a sealed borosilicate photoreactor containing a CO2-saturated MeCN/H2O solution. The standard reaction mixture contained 50 μM iron catalyst, 0.3 mM [Ru(bpy)3]2+, and 0.11 M BIH. Irradiation was performed with blue light at 462 nm. Gas products in the headspace were analyzed by gas chromatography. CO and H2 were detected, while no significant amounts of formate or CH4 were detected. The article distinguishes the roles of the components clearly. The ruthenium complex is the light absorber. After photoexcitation, its excited state is quenched. Both BIH and the iron complexes can quench the excited-state emission of [Ru(bpy)3]2+, but the Stern–Volmer data show that BIH quenches much more efficiently. On that basis, and from the orbital-energy analysis, the article supports '''reductive quenching''' of the excited photosensitizer by BIH as the dominant path. In this interpretation, BIH donates an electron to the excited ruthenium photosensitizer, generating a reduced photosensitizer that can then transfer an electron onward to the iron catalyst. The mechanistic interpretation of catalyst reduction is supported by electrochemistry and DFT. Cyclic voltammetry showed two reduction waves for the iron complexes, and the article assigns these mainly as '''ligand-centered''' reductions rather than simple metal-centered Fe(II)/Fe(I)/Fe(0) steps. DFT calculations showed that the lowest semi-unoccupied orbitals are largely ligand-based. The article therefore interprets the first reduction as formation of a reduced iron complex with electron density primarily on the coordinated ligand framework. Additional cyclic voltammetry under CO2 showed changes relative to Ar, and the article concludes that a one-electron-reduced iron species is sufficient to enter catalysis under conditions accessible to the reduced photosensitizer. The article does not claim direct observation of all catalytic intermediates. Instead, it proposes a mechanistic picture consistent with the electrochemical and photophysical data. In this picture, the reduced iron complex interacts with CO2 to form a catalyst-bound CO2-derived intermediate. Proton-coupled electron transfer is important. The article explicitly states that water assists the process by acting as a proton source and by stabilizing intermediates through hydrogen bonding. It specifically discusses Fe–CO2 and Fe–COOH type species as mechanistically relevant descriptions, but these are '''proposed''' rather than directly observed in the reported experiments. CO is then formed and released from the catalyst, while H2 evolution occurs as a competing side reaction. The role of water was examined systematically. In anhydrous MeCN, the system showed almost no CO formation. Adding 7.5–10% water greatly improved CO production and maintained high CO selectivity. The article interprets this as evidence that water is essential for effective proton-coupled electron transfer and stabilization of catalytic intermediates. At higher water fractions, activity decreased. The article attributes this in part to poor BIH solubility in more aqueous mixtures, which would limit efficient quenching of the excited photosensitizer and weaken the photoredox cycle. Catalyst concentration also had a major effect. Lowering the Fe2 concentration increased TONCO substantially while keeping CO selectivity high. Time-course experiments showed rapid early production of CO and H2, then approach to a plateau. The article links this slowing mainly to photosensitizer deterioration. Supporting this, adding a fresh portion of [Ru(bpy)3]2+ after 24 h restored CO2-to-CO conversion. UV/Vis data also showed hypochromism for the photosensitizer upon prolonged irradiation. Several control experiments support the assignment of a true photocatalytic molecular system. Removal of light, catalyst, photosensitizer, sacrificial donor, or CO2 suppressed product formation. Replacing the iron complex with Fe(ClO4)2 gave only minor activity, showing that free Fe2+ ions are not responsible for the catalysis. Mercury poisoning did not suppress CO formation, which the article takes as evidence against nanoparticle-mediated catalysis and in favor of homogeneous catalysis. Among the catalyst series, Fe2 showed the highest overall activity under the standard conditions, while Fe4 gave the highest CO selectivity in the direct catalyst comparison. The article correlates catalytic behavior with ligand substituent effects, electrochemical properties, and catalyst geometry, but does not claim a fully proven structure–activity mechanism beyond the reported observations and calculations. == Catalyst == The catalysts are a series of molecular homogeneous iron(II) complexes identified as Fe1, Fe2, Fe3, and Fe4. * '''Catalyst class:''' molecular iron(II) bis(pyrazolyl)phenanthroline complexes * '''Metal center:''' Fe(II) * '''Coordination environment:''' tetradentate bis(pyrazolyl)phenanthroline ligand plus two water ligands * '''Geometry:''' distorted octahedral * '''Spin state:''' high-spin quintet ground state * '''Nature of redox processes:''' the reported reductions are described as mainly ligand-centered * '''Catalytic function:''' homogeneous catalyst for visible-light-driven CO2 reduction to CO * '''Catalyst variants:''' ** Fe1: [Fe(bpzphen)(H2O)2](BF4)2 ** Fe2: [Fe(bpzMe2phen)(H2O)2](BF4)2 ** Fe3: [Fe(bpzPhphen)(H2O)2](ClO4)2 ** Fe4: [Fe(bpzCF3phen)(H2O)2](ClO4)2 Fe2 was the most active catalyst in the standard comparison and under the optimized low-loading conditions. Fe4 gave the highest CO selectivity in the standard catalyst comparison. The article reports that Fe4 has a strongly distorted geometry attributed to weak hydrogen-bonding interactions involving the CF3 substituents and coordinated water; the article suggests that this may contribute to its enhanced CO selectivity. The article concludes that the iron catalysts are relatively robust under the reported photochemical conditions, and that deactivation mainly arises from deterioration of the photosensitizer rather than from dominant catalyst decomposition. == Photosensitizer == The photosensitizer is '''[Ru(bpy)3]2+'''. * '''Identity used in the photocatalytic experiments:''' [Ru(bpy)3]2+ * '''Class:''' ruthenium polypyridyl photosensitizer * '''Role:''' visible-light absorber and photoredox mediator * '''Excited-state behavior:''' the article discusses quenching of the excited metal-to-ligand charge-transfer triplet state * '''Dominant quenching mode supported by the data:''' reductive quenching by BIH * '''Why it functions in this system:''' after light absorption and reductive quenching, the reduced photosensitizer is proposed to transfer electrons to the iron catalyst * '''Photophysical evidence:''' emission quenching experiments gave a much larger Stern–Volmer constant for BIH than for the iron complexes * '''Limitation:''' the article reports photosensitizer deterioration during irradiation and identifies this as the main source of system deactivation The article also notes that the iron complexes can quench the excited photosensitizer to some extent, consistent with the possibility of oxidative quenching, but the combined photometric and energetic analysis supports BIH as the dominant quencher under the reported conditions. == Investigation == ```csv catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Fe1 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , none , , CO2 , not reported , not reported , 35 , 462 , 24 , 987 , 41.1 , , , 187 , 7.8 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , none , , CO2 , not reported , not reported , 35 , 462 , 24 , 1318 , 54.9 , , , 243 , 10.1 , , , , H2O , not reported Fe3 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , none , , CO2 , not reported , not reported , 35 , 462 , 24 , 847 , 35.3 , , , 205 , 8.5 , , , , H2O , not reported Fe4 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , none , , CO2 , not reported , not reported , 35 , 462 , 24 , 1265 , 52.7 , , , 133 , 5.5 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , none , , CO2 , not reported , not reported , 35 , 462 , 4 , 311 , 77.7 , , , 51 , 12.8 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , none , , CO2 , not reported , not reported , 35 , 462 , 48 , 1578 , 32.9 , , , 296 , 6.2 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , none , , CO2 , not reported , not reported , 35 , 462 , 96 , 1593 , 16.6 , , , 300 , 3.1 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , none , , CO2 , not reported , not reported , 35 , 462 , 24 , 2 , not reported , , , 22 , not reported , , , , none , Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , none , , CO2 , not reported , not reported , 35 , 462 , 24 , 1352 , 56.3 , , , 285 , 11.9 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , none , , CO2 , not reported , not reported , 35 , 462 , 24 , 661 , 27.5 , , , 191 , 8.0 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , none , , CO2 , not reported , not reported , 35 , 462 , 24 , 621 , 25.8 , , , 77 , 3.2 , , , , H2O , not reported Fe2 , 25 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , none , , CO2 , not reported , not reported , 35 , 462 , 24 , 2086 , 86.9 , , , 123 , 5.1 , , , , H2O , not reported Fe2 , 12.5 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , none , , CO2 , not reported , not reported , 35 , 462 , 24 , 4259 , 177.4 , , , 276 , 11.5 , , , , H2O , not reported Fe2 , 6.25 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , none , , CO2 , not reported , not reported , 35 , 462 , 24 , 10168 , 423.7 , , , 862 , 35.9 , , , , H2O , not reported Fe2 , 3.12 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , none , , CO2 , not reported , not reported , 35 , 462 , 24 , 23138 , 964.1 , , , 2177 , 90.7 , , , , H2O , not reported Fe2 , 3.12 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , none , , CO2 , 2.16 x 10^-8 einstein s^-1 , not reported , 35 , 462 , 4 , 9754 , 2438 , 8.24 , , not reported , not reported , , , , H2O , not reported 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Final URL after redirect: https://api.elsevier.com/content/article/PII:S0021951726000072?httpAccept=text/xml Downloaded 2084 bytes to: /opt/downloadPDF/chemwiki_pubstore/f866f391360acc0a84015f0b545ea3cc.pdf PDF downloaded successfully to: /opt/downloadPDF/chemwiki_pubstore/f866f391360acc0a84015f0b545ea3cc.pdf 18:59:44 396326 MoleculeRGroupServiceClientImpl - Request payload: {"mdl":"\n -INDIGO-01122317072D\n\n 0 0 0 0 0 0 0 0 0 0 0 V3000\nM V30 BEGIN CTAB\nM V30 COUNTS 7 7 0 0 0\nM V30 BEGIN ATOM\nM V30 1 C 2.80985 -5.95007 0.0 0\nM V30 2 C 4.54015 -5.94959 0.0 0\nM V30 3 C 3.67664 -5.44997 0.0 0\nM V30 4 C 4.54015 -6.95053 0.0 0\nM V30 5 C 2.80985 -6.95502 0.0 0\nM V30 6 C 3.67882 -7.45003 0.0 0\nM V30 7 R# 5.375 -7.575 0.0 0 RGROUPS=(1 4)\nM V30 END ATOM\nM V30 BEGIN BOND\nM V30 1 2 3 1\nM V30 2 2 4 2\nM V30 3 1 1 5\nM V30 4 1 2 3\nM V30 5 2 5 6\nM V30 6 1 6 4\nM V30 7 1 7 4\nM V30 END BOND\nM V30 END CTAB\nM END","rgroups":[{"R4":"ACE"}]} 18:59:44 396326 MoleculeRendererClientImpl - Request payload: {"molfile":"\n -INDIGO-08042212082D\n\n 0 0 0 0 0 0 0 0 0 0 0 V3000\nM V30 BEGIN CTAB\nM V30 COUNTS 6 6 0 0 0\nM V30 BEGIN ATOM\nM V30 1 C 1.25985 -4.72507 0.0 0\nM V30 2 C 2.99015 -4.72459 0.0 0\nM V30 3 C 2.12664 -4.22497 0.0 0\nM V30 4 C 2.99015 -5.72553 0.0 0\nM V30 5 C 1.25985 -5.73002 0.0 0\nM V30 6 C 2.12882 -6.22503 0.0 0\nM V30 END ATOM\nM V30 BEGIN BOND\nM V30 1 2 3 1\nM V30 2 2 4 2\nM V30 3 1 1 5\nM V30 4 1 2 3\nM V30 5 2 5 6\nM V30 6 1 6 4\nM V30 END BOND\nM V30 END CTAB\nM END\n"} 18:59:44 396326 TibClient - Request URL: https://service.tib.eu/ts4tib/api/suggest?q=atomic&rows=1 18:59:44 396326 TibClient - Result: {"responseHeader":{"status":0,"QTime":182,"params":{"hl":"true","fl":"autosuggest","start":"0","rows":"1","hl.simple.pre":"","q":"\"atomic\"","defType":"edismax","group.main":"true","hl.simple.post":"","qf":"autosuggest^3 autosuggest_e^2 autosuggest_wse^1","hl.fl":"autosuggest","wt":"json","group.field":"autosuggest","group":"true"}},"response":{"numFound":536,"start":0,"docs":[{"autosuggest":"atomic energy law"}]},"highlighting":{"atomic energy lawbau":{}}} 18:59:47 396326 AIClient - OpenAI ping successful (response id: resp_04d7c0eeea732bf6006a26f501a5ac819d9da4bb32fe2e3c1c). 19:00:03 396599 PublicationImportJob - prompt for AI: [SYSTEM-LIKE INSTRUCTIONS] You are a highly conservative scientific information extractor and formatter. Your primary goal is factual fidelity to the attached article. You must extract only what is explicitly supported by the article. Never guess, reconstruct, or “complete” missing scientific data from general chemistry knowledge. When a value is unclear, ambiguous, inconsistent, or not explicitly stated, output "not reported". Core extraction policy: - Correctness is more important than completeness. - Unit normalization must be exact. - Never confuse catalyst, photosensitizer, sacrificial electron donor, solvent, additive, proton source, irradiation wavelength, or product metric. - Values should only be converted when the article provides a clear and scientifically reliable basis for conversion. - Never infer absolute concentrations from mol% unless the absolute concentration is explicitly stated. - Never infer TON CO from yield, selectivity, graph shape, or discussion text unless the TON CO value itself is explicitly reported or unambiguously readable. - Never replace a wavelength range with a single wavelength. - Never merge data across figures, tables, or sections unless the article clearly shows that they refer to the same experiment. - Never include bibliographic metadata in the output. Formatting policy: - Follow the requested section titles exactly. - Output only the requested final formatted content. - Use "not reported" for unsupported entries. - Do not mention uncertainty analysis, self-checking, or extraction workflow in the final answer. Before finalizing, silently verify: - catalyst concentration is in µM - photosensitizer concentration is in mM - electron donor concentration is in M - excitation wavelength is in nm - TON CO refers only to CO - no unsupported claim has been added - no bibliographic metadata is present [TASK] Read the attached scientific article and convert it into a structured educational chemistry wiki entry about a molecular photocatalytic CO2 reduction system. TASK Produce a scientifically accurate, teaching-oriented summary in MediaWiki format for advanced undergraduate chemistry students. Focus strictly on the chemistry, mechanism, photocatalytic setup, components, and reported results. CONTENT RESTRICTIONS - Use only information explicitly supported by the attached article. - Do NOT include author names, affiliations, journal name, year, DOI, citation labels, references, page numbers, or any publication metadata. - Do NOT speculate. - Do NOT fill missing values from chemical intuition or standard literature practice. - Whenever a requested value is missing, ambiguous, or not explicitly reported, write: "not reported". STYLE REQUIREMENTS - Use proper MediaWiki markup. - Use accessible but precise scientific language. - Keep the explanation educational, technically correct, and chemically specific. - Avoid unnecessary jargon, but do not oversimplify. - Distinguish clearly between established experimental observations and proposed mechanistic interpretation. OUTPUT REQUIREMENTS - Return only the final MediaWiki-formatted entry. - Use exactly the section headings below, in exactly the same order. - Do not add extra sections. - The final section, "Investigation", must contain CSV data inside a plain fenced code block. Use exactly this structure: == Abstract Summary == Provide a concise overview of the scientific goal, the photocatalytic system, and the main findings. State what was converted, what kind of photocatalytic system was used, and what the main outcome was. == Advances and Special Progress == Explain the key scientific advances compared with earlier molecular photocatalytic CO2 reduction systems. Focus on scientifically meaningful progress such as: - higher activity, - improved CO selectivity, - improved compatibility with water or mixed solvents, - unusual catalyst design, - mechanistic insight, - improved durability, - use of earth-abundant components, - unusual electron-transfer design, - better coupling between catalyst and photosensitizer. Only mention advances that are supported by the article itself. == Additional Remarks == Provide important contextual remarks relevant to the chemistry and significance of the work. Examples may include: - sustainability relevance of CO2-to-CO photoreduction, - strengths and limitations of sacrificial photochemical systems, - dependence on noble-metal photosensitizers, - solvent limitations, - water tolerance, - competition with H2 evolution, - catalyst decomposition, - low long-term durability, - mechanistic elegance versus practical limitations. Keep this section balanced, factual, and chemically relevant. == Content of the Published Article in Detail == Write a clear, teaching-oriented explanation of the scientific content of the article. Include, where supported by the article: - the molecular components of the system, - how the photocatalytic experiment is set up, - what happens after light absorption by the photosensitizer, - whether reductive or oxidative quenching is proposed, - how the sacrificial electron donor participates, - how electrons are transferred to the catalyst, - what reduced catalyst states are proposed or observed, - how CO2 activation and reduction are described, - how CO is formed and released, - whether proton transfer is involved, - what side products are observed or suppressed, - what control experiments or spectroscopic/electrochemical studies support the mechanism. Mechanistic explanation rules: - Explain the mechanism in words. - Be chemically accurate. - Distinguish proposed intermediates from directly observed intermediates. - Use cautious wording where appropriate, such as "the article proposes" or "the data support". - Do not overstate mechanistic certainty. Possible supporting evidence may include: - Stern-Volmer quenching, - emission quenching, - transient absorption, - UV/Vis spectroscopy, - cyclic voltammetry, - spectroelectrochemistry, - control experiments omitting one component, - atmosphere controls, - product analysis, - catalyst comparison studies. == Catalyst == Describe the catalyst in a compact but chemically informative way. Include only details explicitly supported by the article, such as: - exact catalyst identity, - catalyst class, - metal center, - oxidation state if stated, - ligand family or coordination environment, - whether it is mononuclear, dinuclear, supramolecular, macrocyclic, polypyridyl, porphyrinic, or another named class, - whether it is molecular, immobilized, or heterogeneous, - catalytic role in CO2 reduction, - special redox or structural properties relevant to function, - selectivity-related features, - stability or decomposition issues relevant to performance. Do not invent structural details beyond what the article actually states or names. == Photosensitizer == Describe the photosensitizer in the same style. Include only details explicitly supported by the article, such as: - exact identity, - photosensitizer class, - light-harvesting role, - excited-state function, - whether it undergoes reductive or oxidative quenching, - relevant redox or photophysical properties if explicitly discussed, - why it is suitable in this system, - any stability or photobleaching issues if reported. If multiple photosensitizers are compared, identify the main one clearly and mention others only when relevant data are reported. == Investigation == Provide the core photocatalytic experiments as ONE fenced code block that starts with ```csv and ends with ```. The block must be plain CSV — no markdown table, no JSON, no text before or after it inside the block. The header row MUST be EXACTLY these columns, in this order: catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Extraction rules for the CSV: - One row per distinct experimental condition explicitly reported. Take the main photocatalytic performance table first, and add control / condition-variation rows when they are explicitly reported. Include EVERY distinct experiment — do not summarise or collapse rows. - Report numbers as bare values (no unit text) in exactly these units, converting only when the article gives a clear basis: cat conc = µM; PS conc = mM; e-D conc = M; H-D conc = M; Temperature = °C; λexc = nm; irr time = h; Turnover_frequency__* = h^-1; Quantum_yield__* = %. - catalyst, PS (photosensitizer), e-D (sacrificial electron donor), H-D (hydrogen/proton donor): use the identity (name or abbreviation) exactly as given in the article. Keep names consistent across rows. Never swap catalyst, photosensitizer, electron donor, hydrogen donor, solvent, or additive. - Turnover_number__X, Turnover_frequency__X, Quantum_yield__X are per product X (CO, CH4, H2, HCOOH). Put each product's value in its own column; never substitute CO yield, selectivity, total TON, or a value read from a graph. - For a solvent mixture, give solvent A/B/C and the ratio in solvent-ratio (for example 4:1). Keep additives out of the solvent fields. - Keep a wavelength range as a range (for example 420-650); a monochromatic source is a single nm value. - Leave a cell EMPTY only when the article does not state the value. Never invent, guess, reconstruct, or infer a value from general knowledge, figures, or discussion — every value must be explicitly supported by the article. - Do NOT use a value that appears only in the supporting information unless the main text also states it. - Never put a comma inside a cell (commas separate columns); use a space or a slash instead. - Do not add, remove, rename, or reorder columns. Before output, silently verify: section headings match exactly; no bibliographic metadata; units are as specified above; catalyst and photosensitizer are not swapped; no unsupported value was added; one row per distinct experiment. Return only the final MediaWiki entry with the CSV code block in the Investigation section. 19:00:05 396599 AIClient - Uploaded file: 1-s2.0-S0021951726000072-main_6a26f4fbac4be.pdf, id: file-XidDUP8unpgoHWYuxcNAkF 19:00:05 396599 AIClient - Request to AI with prompt: '[SYSTEM-LIKE INSTRUCTIONS] You are a highly conservative scientific information extractor and formatter. Your primary goal is factual fidelity to the attached article. You must extract only what is explicitly supported by the article. Never guess, reconstruct, or “complete” missing scientific data from general chemistry knowledge. When a value is unclear, ambiguous, inconsistent, or not explicitly stated, output "not reported". Core extraction policy: - Correctness is more important than completeness. - Unit normalization must be exact. - Never confuse catalyst, photosensitizer, sacrificial electron donor, solvent, additive, proton source, irradiation wavelength, or product metric. - Values should only be converted when the article provides a clear and scientifically reliable basis for conversion. - Never infer absolute concentrations from mol% unless the absolute concentration is explicitly stated. - Never infer TON CO from yield, selectivity, graph shape, or discussion text unless the TON CO value itself is explicitly reported or unambiguously readable. - Never replace a wavelength range with a single wavelength. - Never merge data across figures, tables, or sections unless the article clearly shows that they refer to the same experiment. - Never include bibliographic metadata in the output. Formatting policy: - Follow the requested section titles exactly. - Output only the requested final formatted content. - Use "not reported" for unsupported entries. - Do not mention uncertainty analysis, self-checking, or extraction workflow in the final answer. Before finalizing, silently verify: - catalyst concentration is in µM - photosensitizer concentration is in mM - electron donor concentration is in M - excitation wavelength is in nm - TON CO refers only to CO - no unsupported claim has been added - no bibliographic metadata is present [TASK] Read the attached scientific article and convert it into a structured educational chemistry wiki entry about a molecular photocatalytic CO2 reduction system. TASK Produce a scientifically accurate, teaching-oriented summary in MediaWiki format for advanced undergraduate chemistry students. Focus strictly on the chemistry, mechanism, photocatalytic setup, components, and reported results. CONTENT RESTRICTIONS - Use only information explicitly supported by the attached article. - Do NOT include author names, affiliations, journal name, year, DOI, citation labels, references, page numbers, or any publication metadata. - Do NOT speculate. - Do NOT fill missing values from chemical intuition or standard literature practice. - Whenever a requested value is missing, ambiguous, or not explicitly reported, write: "not reported". STYLE REQUIREMENTS - Use proper MediaWiki markup. - Use accessible but precise scientific language. - Keep the explanation educational, technically correct, and chemically specific. - Avoid unnecessary jargon, but do not oversimplify. - Distinguish clearly between established experimental observations and proposed mechanistic interpretation. OUTPUT REQUIREMENTS - Return only the final MediaWiki-formatted entry. - Use exactly the section headings below, in exactly the same order. - Do not add extra sections. - The final section, "Investigation", must contain CSV data inside a plain fenced code block. Use exactly this structure: == Abstract Summary == Provide a concise overview of the scientific goal, the photocatalytic system, and the main findings. State what was converted, what kind of photocatalytic system was used, and what the main outcome was. == Advances and Special Progress == Explain the key scientific advances compared with earlier molecular photocatalytic CO2 reduction systems. Focus on scientifically meaningful progress such as: - higher activity, - improved CO selectivity, - improved compatibility with water or mixed solvents, - unusual catalyst design, - mechanistic insight, - improved durability, - use of earth-abundant components, - unusual electron-transfer design, - better coupling between catalyst and photosensitizer. Only mention advances that are supported by the article itself. == Additional Remarks == Provide important contextual remarks relevant to the chemistry and significance of the work. Examples may include: - sustainability relevance of CO2-to-CO photoreduction, - strengths and limitations of sacrificial photochemical systems, - dependence on noble-metal photosensitizers, - solvent limitations, - water tolerance, - competition with H2 evolution, - catalyst decomposition, - low long-term durability, - mechanistic elegance versus practical limitations. Keep this section balanced, factual, and chemically relevant. == Content of the Published Article in Detail == Write a clear, teaching-oriented explanation of the scientific content of the article. Include, where supported by the article: - the molecular components of the system, - how the photocatalytic experiment is set up, - what happens after light absorption by the photosensitizer, - whether reductive or oxidative quenching is proposed, - how the sacrificial electron donor participates, - how electrons are transferred to the catalyst, - what reduced catalyst states are proposed or observed, - how CO2 activation and reduction are described, - how CO is formed and released, - whether proton transfer is involved, - what side products are observed or suppressed, - what control experiments or spectroscopic/electrochemical studies support the mechanism. Mechanistic explanation rules: - Explain the mechanism in words. - Be chemically accurate. - Distinguish proposed intermediates from directly observed intermediates. - Use cautious wording where appropriate, such as "the article proposes" or "the data support". - Do not overstate mechanistic certainty. Possible supporting evidence may include: - Stern-Volmer quenching, - emission quenching, - transient absorption, - UV/Vis spectroscopy, - cyclic voltammetry, - spectroelectrochemistry, - control experiments omitting one component, - atmosphere controls, - product analysis, - catalyst comparison studies. == Catalyst == Describe the catalyst in a compact but chemically informative way. Include only details explicitly supported by the article, such as: - exact catalyst identity, - catalyst class, - metal center, - oxidation state if stated, - ligand family or coordination environment, - whether it is mononuclear, dinuclear, supramolecular, macrocyclic, polypyridyl, porphyrinic, or another named class, - whether it is molecular, immobilized, or heterogeneous, - catalytic role in CO2 reduction, - special redox or structural properties relevant to function, - selectivity-related features, - stability or decomposition issues relevant to performance. Do not invent structural details beyond what the article actually states or names. == Photosensitizer == Describe the photosensitizer in the same style. Include only details explicitly supported by the article, such as: - exact identity, - photosensitizer class, - light-harvesting role, - excited-state function, - whether it undergoes reductive or oxidative quenching, - relevant redox or photophysical properties if explicitly discussed, - why it is suitable in this system, - any stability or photobleaching issues if reported. If multiple photosensitizers are compared, identify the main one clearly and mention others only when relevant data are reported. == Investigation == Provide the core photocatalytic experiments as ONE fenced code block that starts with ```csv and ends with ```. The block must be plain CSV — no markdown table, no JSON, no text before or after it inside the block. The header row MUST be EXACTLY these columns, in this order: catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Extraction rules for the CSV: - One row per distinct experimental condition explicitly reported. Take the main photocatalytic performance table first, and add control / condition-variation rows when they are explicitly reported. Include EVERY distinct experiment — do not summarise or collapse rows. - Report numbers as bare values (no unit text) in exactly these units, converting only when the article gives a clear basis: cat conc = µM; PS conc = mM; e-D conc = M; H-D conc = M; Temperature = °C; λexc = nm; irr time = h; Turnover_frequency__* = h^-1; Quantum_yield__* = %. - catalyst, PS (photosensitizer), e-D (sacrificial electron donor), H-D (hydrogen/proton donor): use the identity (name or abbreviation) exactly as given in the article. Keep names consistent across rows. Never swap catalyst, photosensitizer, electron donor, hydrogen donor, solvent, or additive. - Turnover_number__X, Turnover_frequency__X, Quantum_yield__X are per product X (CO, CH4, H2, HCOOH). Put each product's value in its own column; never substitute CO yield, selectivity, total TON, or a value read from a graph. - For a solvent mixture, give solvent A/B/C and the ratio in solvent-ratio (for example 4:1). Keep additives out of the solvent fields. - Keep a wavelength range as a range (for example 420-650); a monochromatic source is a single nm value. - Leave a cell EMPTY only when the article does not state the value. Never invent, guess, reconstruct, or infer a value from general knowledge, figures, or discussion — every value must be explicitly supported by the article. - Do NOT use a value that appears only in the supporting information unless the main text also states it. - Never put a comma inside a cell (commas separate columns); use a space or a slash instead. - Do not add, remove, rename, or reorder columns. Before output, silently verify: section headings match exactly; no bibliographic metadata; units are as specified above; catalyst and photosensitizer are not swapped; no unsupported value was added; one row per distinct experiment. Return only the final MediaWiki entry with the CSV code block in the Investigation section.' and documents [file-XidDUP8unpgoHWYuxcNAkF] 19:01:21 396599 AIClient - Response from AI: == Abstract Summary == This article describes a visible-light-driven homogeneous molecular system for reducing CO2 to CO using iron(II) bis(pyrazolyl)phenanthroline complexes as catalysts. The catalytic mixtures used an iron complex, [Ru(bpy)3]2+ as photosensitizer, and BIH as sacrificial electron donor in CO2-saturated MeCN/H2O. All four iron complexes were active for CO formation. The best-performing catalyst in the series was Fe2, which gave a reported TONCO of 1318 at 50 μM catalyst after 24 h, and up to 23138 at lower catalyst loading. CO selectivity was high across the series, reaching 91% for Fe4 and up to 94% for Fe2 under selected conditions. Mechanistic and control experiments supported a homogeneous photocatalytic process, and the article attributes long-time deactivation mainly to deterioration of the photosensitizer rather than complete catalyst loss. == Advances and Special Progress == The article presents several advances that are explicitly supported by the reported data: * '''New iron catalyst family for molecular CO2 photoreduction''': the work introduces iron(II) complexes bearing bis(pyrazolyl)phenanthroline ligands, a ligand framework described as largely unexplored for this reaction. * '''Use of an earth-abundant catalytic metal''': the catalytic center is iron, rather than a precious metal. * '''High activity under visible light''': Fe2 reached a reported TONCO of 1318 under standard conditions and up to 23138 at lower catalyst loading. * '''High CO selectivity''': Fe4 reached 91% CO selectivity in the catalyst comparison, and Fe2 reached up to 94% CO selectivity under selected conditions. * '''Tolerance of mixed aqueous medium''': the system operates in MeCN/H2O, and the article identifies 7.5-10% water as especially beneficial for activity and selectivity. * '''Mechanistic insight from combined methods''': the study combines UV/Vis spectroscopy, emission quenching, cyclic voltammetry, DFT, and control experiments to support a reductive quenching pathway involving the photosensitizer and BIH, followed by catalyst reduction and CO2 activation. * '''Evidence for homogeneous catalysis and robustness''': control experiments and Hg poisoning tests supported the conclusion that catalysis is not due to iron nanoparticles, and the catalyst is described as robust under the reaction conditions, with major deactivation assigned mainly to photosensitizer degradation. == Additional Remarks == Photocatalytic CO2-to-CO conversion is chemically important because CO is a useful carbon feedstock. In this system, the reaction is achieved under visible light with a molecular iron catalyst, but it still depends on a sacrificial photochemical setup rather than a closed catalytic energy-conversion cycle. The catalytic system uses [Ru(bpy)3]2+ as the photosensitizer, so although the catalyst itself is based on an earth-abundant metal, the full light-harvesting assembly is not fully earth-abundant. Water plays a chemically important but nontrivial role. The article shows that some water is essential for efficient catalysis, likely because proton-coupled steps and stabilization of reduced CO2-derived intermediates require it. However, too much water lowers performance, which the article associates with the poor solubility of BIH in more aqueous media. A competing reaction is H2 evolution. The reported systems suppress it reasonably well, but it is not eliminated. Product selectivity therefore depends on catalyst structure and reaction conditions. The article also makes clear that long irradiation does not lead to unlimited turnover. Activity rises and then plateaus, and the authors attribute this mainly to photosensitizer degradation rather than to immediate loss of the molecular iron catalyst. == Content of the Published Article in Detail == The photocatalytic system contains three essential molecular components: * an iron(II) bis(pyrazolyl)phenanthroline complex as the CO2 reduction catalyst, * [Ru(bpy)3]2+ as the photosensitizer, * BIH as the sacrificial electron donor. The reactions were performed in a borosilicate photoreactor containing a CO2-saturated MeCN/H2O solution. Standard conditions used 50 μM catalyst, 0.3 mM [Ru(bpy)3]2+, and 0.11 M BIH in 4.0 mL solvent, irradiated with blue light at 462 nm. === Molecular catalyst series === Four iron complexes were examined: * Fe1 = [Fe(bpzphen)(H2O)2](BF4)2 * Fe2 = [Fe(bpzMe2phen)(H2O)2](BF4)2 * Fe3 = [Fe(bpzPhphen)(H2O)2](ClO4)2 * Fe4 = [Fe(bpzCF3phen)(H2O)2](ClO4)2 The article reports that all complexes are high-spin iron(II) species with distorted octahedral geometries. The tetradentate bis(pyrazolyl)phenanthroline ligand occupies four coordination sites, and two water molecules occupy the remaining positions. === Photophysical and electronic observations === UV/Vis spectroscopy showed strong absorptions in the ultraviolet region. The article assigns these mainly to ligand-centered π-π* transitions. Much weaker red-shifted bands were observed at longer wavelength and were attributed to forbidden transitions. DFT and TD-DFT calculations support the view that the optical properties are largely ligand-based. The article also reports that the frontier orbitals relevant to reduction have substantial ligand character, and electrochemistry is interpreted accordingly. === Electrochemistry and catalyst reduction === Cyclic voltammetry showed two reduction waves for the iron complexes in MeCN electrolyte. The article discusses two possible assignments for these reductions, but the authors favor ligand-centered reductions rather than formal metal-centered Fe(II)/Fe(I)/Fe(0) steps. This interpretation is supported by DFT, which indicates that the relevant low-lying unoccupied orbitals are mainly ligand-based. Additional cyclic voltammetry under CO2 and within the potential window accessible to reduced [Ru(bpy)3]+ showed changes consistent with reaction between reduced iron species and CO2. The article concludes that single-electron reduction of the iron complex is sufficient to generate catalytically relevant states under the photocatalytic conditions. === Proposed photochemical sequence === The article combines orbital-energy analysis and emission quenching experiments to discuss how the photocatalytic cycle begins. After light absorption, [Ru(bpy)3]2+ is excited to its 3MLCT state. Stern-Volmer analysis showed that BIH quenches the excited photosensitizer much more efficiently than the iron complexes. On that basis, the article supports '''reductive quenching''' of excited [Ru(bpy)3]2+ by BIH as the dominant pathway. The article further argues that the reduced photosensitizer can then transfer an electron to the iron complex. The iron complex is therefore reduced to a catalytically active state before reacting with CO2. The article does not report direct spectroscopic observation of a single discrete Fe-CO2 intermediate under photocatalytic conditions. However, it proposes that reduced iron species react with CO2, and it specifically discusses the importance of proton-coupled electron transfer. In this context, the paper states that water is essential because it can stabilize intermediates and provide proton participation needed for conversion of coordinated CO2 into species such as an Fe-COOH-type intermediate. CO formation is then described as arising from further transformation of such reduced, protonated CO2-derived species. Thus, the mechanistic picture supported by the article is: # visible-light excitation of [Ru(bpy)3]2+, # reductive quenching by BIH, # electron transfer from the reduced photosensitizer to the iron catalyst, # formation of a reduced iron state, # CO2 activation at the reduced catalyst, # proton-coupled reduction steps assisted by water, # release of CO. This sequence is a proposed interpretation supported by quenching, electrochemical, and control data rather than a fully directly observed catalytic cycle. === Role of water === Water was shown to be critical. In anhydrous MeCN, catalysis was nearly shut down, with only trace CO reported. Adding 7.5-10% water strongly improved both activity and CO selectivity. The article interprets this as evidence that water assists proton-coupled electron transfer and stabilizes key intermediates through hydrogen bonding or proton donation. At higher water fractions, activity decreased. The article attributes this decline at least partly to the poor solubility of BIH in more aqueous media, which would reduce efficient quenching of the photosensitizer. === Products and selectivity === The gaseous products were analyzed by headspace gas chromatography. CO and H2 were the main detected gaseous products. No significant CH4 was detected. Formate was monitored by 1H NMR spectroscopy, and no significant amount was detected. The iron complexes favor CO formation over H2 evolution under the reported conditions. Fe2 gave the highest overall activity, while Fe4 gave the highest CO selectivity in the initial catalyst comparison. === Control experiments and evidence for homogeneity === The article reports no significant catalytic production when any of the essential elements was omitted: * no light, * no catalyst, * no photosensitizer, * no sacrificial donor, * no CO2. Using Fe(ClO4)2 instead of the defined iron complex gave only small amounts of products, showing that free Fe2+ does not account for the observed activity. Hg poisoning experiments did not suppress activity, and the authors interpret this as evidence against nanoparticle-based catalysis. Together with the other controls, this supports a homogeneous molecular mechanism. === Durability and deactivation === Time-course experiments showed increasing turnover numbers up to about 48 h, after which the reaction approached a plateau. The article attributes deactivation mainly to deterioration of the [Ru(bpy)3]2+ photosensitizer. This interpretation is supported by observed hypochromism of the photosensitizer upon prolonged irradiation and by the fact that adding a fresh portion of [Ru(bpy)3]2+ after 24 h restored further CO production. == Catalyst == The catalysts are homogeneous molecular iron(II) complexes of the general type [Fe(bis(pyrazolyl)phenanthroline)(H2O)2]X2. The article studies four specific catalysts: * '''Fe1''': [Fe(bpzphen)(H2O)2](BF4)2 * '''Fe2''': [Fe(bpzMe2phen)(H2O)2](BF4)2 * '''Fe3''': [Fe(bpzPhphen)(H2O)2](ClO4)2 * '''Fe4''': [Fe(bpzCF3phen)(H2O)2](ClO4)2 These are mononuclear iron(II) coordination complexes with tetradentate bis(pyrazolyl)phenanthroline ligands and two coordinated water molecules. The article describes them as high-spin quintet iron(II) complexes with distorted octahedral geometries. Their redox chemistry is interpreted mainly as ligand-centered. All four act as molecular catalysts for photocatalytic CO2-to-CO conversion under visible light when paired with the ruthenium photosensitizer and BIH. Among the series, Fe2 gave the highest overall CO productivity, while Fe4 showed the highest CO selectivity in the direct catalyst comparison. The article suggests that intramolecular interactions in Fe4 involving the CF3-substituted ligand may contribute to its enhanced selectivity, but this is presented as an interpretation of the computed structure rather than as direct experimental proof. The catalyst system is described as robust and homogeneous, but long-time performance is still limited by photochemical system degradation. The article states that deactivation arises mainly from photosensitizer deterioration rather than catalyst decomposition. == Photosensitizer == The photosensitizer is '''[Ru(bpy)3]2+'''. It serves as the visible-light absorber and initiates the electron-transfer sequence after excitation. The article discusses excitation of [Ru(bpy)3]2+ to its 3MLCT excited state. Emission quenching experiments show that BIH quenches this excited state more effectively than the iron complexes, supporting a '''reductive quenching''' pathway. In the proposed sequence, the reductively quenched photosensitizer then transfers an electron to the iron catalyst. The article also notes that the reduced catalyst states are accessible within the redox window relevant to the reduced photosensitizer. A limitation of the system is that the photosensitizer degrades during prolonged irradiation. The article presents this deterioration as the main reason the reaction slows and eventually plateaus. == Investigation == ```csv catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Fe1 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 987 , 41.1 , , , 187 , 7.8 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 1318 , 54.9 , , , 243 , 10.1 , , , , H2O , not reported Fe3 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 847 , 35.3 , , , 205 , 8.5 , , , , H2O , not reported Fe4 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 1265 , 52.7 , , , 133 , 5.5 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 4 , 311 , 77.7 , , , 51 , 12.8 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 48 , 1578 , 32.9 , , , 296 , 6.2 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 96 , 1593 , 16.6 , , , 300 , 3.1 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 2 , not reported , , , 22 , not reported , , , , , Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 1352 , 56.3 , , , 285 , 11.9 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 661 , 27.5 , , , 191 , 8.0 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 621 , 25.8 , , , 77 , 3.2 , , , , H2O , not reported Fe2 , 25 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 2086 , 86.9 , , , 123 , 5.1 , , , , H2O , not reported Fe2 , 12.5 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 4259 , 177.4 , , , 276 , 11.5 , , , , H2O , not reported Fe2 , 6.25 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 10168 , 423.7 , , , 862 , 35.9 , , , , H2O , not reported Fe2 , 3.12 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 23138 , 964.1 , , , 2177 , 90.7 , , , , H2O , not reported Fe2 , 3.12 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 4 , 9754 , 2438 , 7.6 , , not reported , not reported , , , , H2O , not reported ``` 20:02:02 398541 PublicationImportJob - prompt for AI: [SYSTEM-LIKE INSTRUCTIONS] You are a highly conservative scientific information extractor and formatter. Your primary goal is factual fidelity to the attached article. You must extract only what is explicitly supported by the article. Never guess, reconstruct, or “complete” missing scientific data from general chemistry knowledge. When a value is unclear, ambiguous, inconsistent, or not explicitly stated, output "not reported". Core extraction policy: - Correctness is more important than completeness. - Unit normalization must be exact. - Never confuse catalyst, photosensitizer, sacrificial electron donor, solvent, additive, proton source, irradiation wavelength, or product metric. - Values should only be converted when the article provides a clear and scientifically reliable basis for conversion. - Never infer absolute concentrations from mol% unless the absolute concentration is explicitly stated. - Never infer TON CO from yield, selectivity, graph shape, or discussion text unless the TON CO value itself is explicitly reported or unambiguously readable. - Never replace a wavelength range with a single wavelength. - Never merge data across figures, tables, or sections unless the article clearly shows that they refer to the same experiment. - Never include bibliographic metadata in the output. Formatting policy: - Follow the requested section titles exactly. - Output only the requested final formatted content. - Use "not reported" for unsupported entries. - Do not mention uncertainty analysis, self-checking, or extraction workflow in the final answer. Before finalizing, silently verify: - catalyst concentration is in µM - photosensitizer concentration is in mM - electron donor concentration is in M - excitation wavelength is in nm - TON CO refers only to CO - no unsupported claim has been added - no bibliographic metadata is present [TASK] Read the attached scientific article and convert it into a structured educational chemistry wiki entry about a molecular photocatalytic CO2 reduction system. TASK Produce a scientifically accurate, teaching-oriented summary in MediaWiki format for advanced undergraduate chemistry students. Focus strictly on the chemistry, mechanism, photocatalytic setup, components, and reported results. CONTENT RESTRICTIONS - Use only information explicitly supported by the attached article. - Do NOT include author names, affiliations, journal name, year, DOI, citation labels, references, page numbers, or any publication metadata. - Do NOT speculate. - Do NOT fill missing values from chemical intuition or standard literature practice. - Whenever a requested value is missing, ambiguous, or not explicitly reported, write: "not reported". STYLE REQUIREMENTS - Use proper MediaWiki markup. - Use accessible but precise scientific language. - Keep the explanation educational, technically correct, and chemically specific. - Avoid unnecessary jargon, but do not oversimplify. - Distinguish clearly between established experimental observations and proposed mechanistic interpretation. OUTPUT REQUIREMENTS - Return only the final MediaWiki-formatted entry. - Use exactly the section headings below, in exactly the same order. - Do not add extra sections. - The final section, "Investigation", must contain CSV data inside a plain fenced code block. Use exactly this structure: == Abstract Summary == Provide a concise overview of the scientific goal, the photocatalytic system, and the main findings. State what was converted, what kind of photocatalytic system was used, and what the main outcome was. == Advances and Special Progress == Explain the key scientific advances compared with earlier molecular photocatalytic CO2 reduction systems. Focus on scientifically meaningful progress such as: - higher activity, - improved CO selectivity, - improved compatibility with water or mixed solvents, - unusual catalyst design, - mechanistic insight, - improved durability, - use of earth-abundant components, - unusual electron-transfer design, - better coupling between catalyst and photosensitizer. Only mention advances that are supported by the article itself. == Additional Remarks == Provide important contextual remarks relevant to the chemistry and significance of the work. Examples may include: - sustainability relevance of CO2-to-CO photoreduction, - strengths and limitations of sacrificial photochemical systems, - dependence on noble-metal photosensitizers, - solvent limitations, - water tolerance, - competition with H2 evolution, - catalyst decomposition, - low long-term durability, - mechanistic elegance versus practical limitations. Keep this section balanced, factual, and chemically relevant. == Content of the Published Article in Detail == Write a clear, teaching-oriented explanation of the scientific content of the article. Include, where supported by the article: - the molecular components of the system, - how the photocatalytic experiment is set up, - what happens after light absorption by the photosensitizer, - whether reductive or oxidative quenching is proposed, - how the sacrificial electron donor participates, - how electrons are transferred to the catalyst, - what reduced catalyst states are proposed or observed, - how CO2 activation and reduction are described, - how CO is formed and released, - whether proton transfer is involved, - what side products are observed or suppressed, - what control experiments or spectroscopic/electrochemical studies support the mechanism. Mechanistic explanation rules: - Explain the mechanism in words. - Be chemically accurate. - Distinguish proposed intermediates from directly observed intermediates. - Use cautious wording where appropriate, such as "the article proposes" or "the data support". - Do not overstate mechanistic certainty. Possible supporting evidence may include: - Stern-Volmer quenching, - emission quenching, - transient absorption, - UV/Vis spectroscopy, - cyclic voltammetry, - spectroelectrochemistry, - control experiments omitting one component, - atmosphere controls, - product analysis, - catalyst comparison studies. == Catalyst == Describe the catalyst in a compact but chemically informative way. Include only details explicitly supported by the article, such as: - exact catalyst identity, - catalyst class, - metal center, - oxidation state if stated, - ligand family or coordination environment, - whether it is mononuclear, dinuclear, supramolecular, macrocyclic, polypyridyl, porphyrinic, or another named class, - whether it is molecular, immobilized, or heterogeneous, - catalytic role in CO2 reduction, - special redox or structural properties relevant to function, - selectivity-related features, - stability or decomposition issues relevant to performance. Do not invent structural details beyond what the article actually states or names. == Photosensitizer == Describe the photosensitizer in the same style. Include only details explicitly supported by the article, such as: - exact identity, - photosensitizer class, - light-harvesting role, - excited-state function, - whether it undergoes reductive or oxidative quenching, - relevant redox or photophysical properties if explicitly discussed, - why it is suitable in this system, - any stability or photobleaching issues if reported. If multiple photosensitizers are compared, identify the main one clearly and mention others only when relevant data are reported. == Investigation == Provide the core photocatalytic experiments as ONE fenced code block that starts with ```csv and ends with ```. The block must be plain CSV — no markdown table, no JSON, no text before or after it inside the block. The header row MUST be EXACTLY these columns, in this order: catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Extraction rules for the CSV: - One row per distinct experimental condition explicitly reported. Take the main photocatalytic performance table first, and add control / condition-variation rows when they are explicitly reported. Include EVERY distinct experiment — do not summarise or collapse rows. - Report numbers as bare values (no unit text) in exactly these units, converting only when the article gives a clear basis: cat conc = µM; PS conc = mM; e-D conc = M; H-D conc = M; Temperature = °C; λexc = nm; irr time = h; Turnover_frequency__* = h^-1; Quantum_yield__* = %. - catalyst, PS (photosensitizer), e-D (sacrificial electron donor), H-D (hydrogen/proton donor): use the identity (name or abbreviation) exactly as given in the article. Keep names consistent across rows. Never swap catalyst, photosensitizer, electron donor, hydrogen donor, solvent, or additive. - Turnover_number__X, Turnover_frequency__X, Quantum_yield__X are per product X (CO, CH4, H2, HCOOH). Put each product's value in its own column; never substitute CO yield, selectivity, total TON, or a value read from a graph. - For a solvent mixture, give solvent A/B/C and the ratio in solvent-ratio (for example 4:1). Keep additives out of the solvent fields. - Keep a wavelength range as a range (for example 420-650); a monochromatic source is a single nm value. - Leave a cell EMPTY only when the article does not state the value. Never invent, guess, reconstruct, or infer a value from general knowledge, figures, or discussion — every value must be explicitly supported by the article. - Do NOT use a value that appears only in the supporting information unless the main text also states it. - Never put a comma inside a cell (commas separate columns); use a space or a slash instead. - Do not add, remove, rename, or reorder columns. Before output, silently verify: section headings match exactly; no bibliographic metadata; units are as specified above; catalyst and photosensitizer are not swapped; no unsupported value was added; one row per distinct experiment. Return only the final MediaWiki entry with the CSV code block in the Investigation section. 20:02:04 398541 AIClient - Uploaded file: 1-s2.0-S0021951726000072-main_6a26f4fbac4be.pdf, id: file-JAzV7MaP54q1PS3DmN5dzV 20:02:04 398541 AIClient - Request to AI with prompt: '[SYSTEM-LIKE INSTRUCTIONS] You are a highly conservative scientific information extractor and formatter. Your primary goal is factual fidelity to the attached article. You must extract only what is explicitly supported by the article. Never guess, reconstruct, or “complete” missing scientific data from general chemistry knowledge. When a value is unclear, ambiguous, inconsistent, or not explicitly stated, output "not reported". Core extraction policy: - Correctness is more important than completeness. - Unit normalization must be exact. - Never confuse catalyst, photosensitizer, sacrificial electron donor, solvent, additive, proton source, irradiation wavelength, or product metric. - Values should only be converted when the article provides a clear and scientifically reliable basis for conversion. - Never infer absolute concentrations from mol% unless the absolute concentration is explicitly stated. - Never infer TON CO from yield, selectivity, graph shape, or discussion text unless the TON CO value itself is explicitly reported or unambiguously readable. - Never replace a wavelength range with a single wavelength. - Never merge data across figures, tables, or sections unless the article clearly shows that they refer to the same experiment. - Never include bibliographic metadata in the output. Formatting policy: - Follow the requested section titles exactly. - Output only the requested final formatted content. - Use "not reported" for unsupported entries. - Do not mention uncertainty analysis, self-checking, or extraction workflow in the final answer. Before finalizing, silently verify: - catalyst concentration is in µM - photosensitizer concentration is in mM - electron donor concentration is in M - excitation wavelength is in nm - TON CO refers only to CO - no unsupported claim has been added - no bibliographic metadata is present [TASK] Read the attached scientific article and convert it into a structured educational chemistry wiki entry about a molecular photocatalytic CO2 reduction system. TASK Produce a scientifically accurate, teaching-oriented summary in MediaWiki format for advanced undergraduate chemistry students. Focus strictly on the chemistry, mechanism, photocatalytic setup, components, and reported results. CONTENT RESTRICTIONS - Use only information explicitly supported by the attached article. - Do NOT include author names, affiliations, journal name, year, DOI, citation labels, references, page numbers, or any publication metadata. - Do NOT speculate. - Do NOT fill missing values from chemical intuition or standard literature practice. - Whenever a requested value is missing, ambiguous, or not explicitly reported, write: "not reported". STYLE REQUIREMENTS - Use proper MediaWiki markup. - Use accessible but precise scientific language. - Keep the explanation educational, technically correct, and chemically specific. - Avoid unnecessary jargon, but do not oversimplify. - Distinguish clearly between established experimental observations and proposed mechanistic interpretation. OUTPUT REQUIREMENTS - Return only the final MediaWiki-formatted entry. - Use exactly the section headings below, in exactly the same order. - Do not add extra sections. - The final section, "Investigation", must contain CSV data inside a plain fenced code block. Use exactly this structure: == Abstract Summary == Provide a concise overview of the scientific goal, the photocatalytic system, and the main findings. State what was converted, what kind of photocatalytic system was used, and what the main outcome was. == Advances and Special Progress == Explain the key scientific advances compared with earlier molecular photocatalytic CO2 reduction systems. Focus on scientifically meaningful progress such as: - higher activity, - improved CO selectivity, - improved compatibility with water or mixed solvents, - unusual catalyst design, - mechanistic insight, - improved durability, - use of earth-abundant components, - unusual electron-transfer design, - better coupling between catalyst and photosensitizer. Only mention advances that are supported by the article itself. == Additional Remarks == Provide important contextual remarks relevant to the chemistry and significance of the work. Examples may include: - sustainability relevance of CO2-to-CO photoreduction, - strengths and limitations of sacrificial photochemical systems, - dependence on noble-metal photosensitizers, - solvent limitations, - water tolerance, - competition with H2 evolution, - catalyst decomposition, - low long-term durability, - mechanistic elegance versus practical limitations. Keep this section balanced, factual, and chemically relevant. == Content of the Published Article in Detail == Write a clear, teaching-oriented explanation of the scientific content of the article. Include, where supported by the article: - the molecular components of the system, - how the photocatalytic experiment is set up, - what happens after light absorption by the photosensitizer, - whether reductive or oxidative quenching is proposed, - how the sacrificial electron donor participates, - how electrons are transferred to the catalyst, - what reduced catalyst states are proposed or observed, - how CO2 activation and reduction are described, - how CO is formed and released, - whether proton transfer is involved, - what side products are observed or suppressed, - what control experiments or spectroscopic/electrochemical studies support the mechanism. Mechanistic explanation rules: - Explain the mechanism in words. - Be chemically accurate. - Distinguish proposed intermediates from directly observed intermediates. - Use cautious wording where appropriate, such as "the article proposes" or "the data support". - Do not overstate mechanistic certainty. Possible supporting evidence may include: - Stern-Volmer quenching, - emission quenching, - transient absorption, - UV/Vis spectroscopy, - cyclic voltammetry, - spectroelectrochemistry, - control experiments omitting one component, - atmosphere controls, - product analysis, - catalyst comparison studies. == Catalyst == Describe the catalyst in a compact but chemically informative way. Include only details explicitly supported by the article, such as: - exact catalyst identity, - catalyst class, - metal center, - oxidation state if stated, - ligand family or coordination environment, - whether it is mononuclear, dinuclear, supramolecular, macrocyclic, polypyridyl, porphyrinic, or another named class, - whether it is molecular, immobilized, or heterogeneous, - catalytic role in CO2 reduction, - special redox or structural properties relevant to function, - selectivity-related features, - stability or decomposition issues relevant to performance. Do not invent structural details beyond what the article actually states or names. == Photosensitizer == Describe the photosensitizer in the same style. Include only details explicitly supported by the article, such as: - exact identity, - photosensitizer class, - light-harvesting role, - excited-state function, - whether it undergoes reductive or oxidative quenching, - relevant redox or photophysical properties if explicitly discussed, - why it is suitable in this system, - any stability or photobleaching issues if reported. If multiple photosensitizers are compared, identify the main one clearly and mention others only when relevant data are reported. == Investigation == Provide the core photocatalytic experiments as ONE fenced code block that starts with ```csv and ends with ```. The block must be plain CSV — no markdown table, no JSON, no text before or after it inside the block. The header row MUST be EXACTLY these columns, in this order: catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Extraction rules for the CSV: - One row per distinct experimental condition explicitly reported. Take the main photocatalytic performance table first, and add control / condition-variation rows when they are explicitly reported. Include EVERY distinct experiment — do not summarise or collapse rows. - Report numbers as bare values (no unit text) in exactly these units, converting only when the article gives a clear basis: cat conc = µM; PS conc = mM; e-D conc = M; H-D conc = M; Temperature = °C; λexc = nm; irr time = h; Turnover_frequency__* = h^-1; Quantum_yield__* = %. - catalyst, PS (photosensitizer), e-D (sacrificial electron donor), H-D (hydrogen/proton donor): use the identity (name or abbreviation) exactly as given in the article. Keep names consistent across rows. Never swap catalyst, photosensitizer, electron donor, hydrogen donor, solvent, or additive. - Turnover_number__X, Turnover_frequency__X, Quantum_yield__X are per product X (CO, CH4, H2, HCOOH). Put each product's value in its own column; never substitute CO yield, selectivity, total TON, or a value read from a graph. - For a solvent mixture, give solvent A/B/C and the ratio in solvent-ratio (for example 4:1). Keep additives out of the solvent fields. - Keep a wavelength range as a range (for example 420-650); a monochromatic source is a single nm value. - Leave a cell EMPTY only when the article does not state the value. Never invent, guess, reconstruct, or infer a value from general knowledge, figures, or discussion — every value must be explicitly supported by the article. - Do NOT use a value that appears only in the supporting information unless the main text also states it. - Never put a comma inside a cell (commas separate columns); use a space or a slash instead. - Do not add, remove, rename, or reorder columns. Before output, silently verify: section headings match exactly; no bibliographic metadata; units are as specified above; catalyst and photosensitizer are not swapped; no unsupported value was added; one row per distinct experiment. Return only the final MediaWiki entry with the CSV code block in the Investigation section.' and documents [file-JAzV7MaP54q1PS3DmN5dzV] 20:03:10 398541 AIClient - Response from AI: == Abstract Summary == This article describes a homogeneous molecular photocatalytic system for the visible-light reduction of CO2 to CO using iron(II) complexes bearing bis(pyrazolyl)phenanthroline ligands. The catalytic system combines an iron catalyst, [Ru(bpy)3]2+ as photosensitizer, and BIH as sacrificial electron donor in CO2-saturated MeCN/H2O. All four iron complexes were active for CO formation under visible light. The best overall catalyst under the standard conditions was Fe2, which reached a TONCO of 1318 with 84% CO selectivity. Under lower catalyst loading, Fe2 reached a much higher TONCO of 23,138, and under short irradiation at low loading it gave a TONCO of 9754, a TOFCO of 2438 h−1, and a total quantum yield of 8.24% as stated in the abstract. The study also shows that water is important for effective catalysis and that catalyst deactivation is mainly associated with deterioration of the photosensitizer rather than loss of the molecular iron catalyst. == Advances and Special Progress == The article presents several advances within molecular photocatalytic CO2-to-CO chemistry that are explicitly supported by the reported data. First, it introduces a new iron catalyst platform based on bis(pyrazolyl)phenanthroline ligands. The article identifies this ligand framework as largely unexplored for Fe(II)-based photocatalytic CO2 reduction, in contrast to more established polypyridyl and salophen-type iron systems. Second, the work demonstrates strong catalytic performance using an earth-abundant iron center as the CO2-reduction catalyst. Under optimized low-catalyst-loading conditions, Fe2 reached a very high TONCO of 23,138 while maintaining high CO selectivity. The article presents this as one of the strongest performances within the reported catalyst family. Third, the system retains good activity and selectivity in mixed MeCN/H2O solvent. The article shows that 7.5–10% water is especially beneficial, giving both high activity and high CO selectivity. This is chemically important because water assists proton-coupled steps and stabilization of catalytic intermediates. Fourth, the catalyst series provides a clear structure–activity comparison. Changes in pyrazolyl substituents modulate redox behavior, orbital energies, catalytic activity, and CO/H2 selectivity. Fe2 gave the highest activity, while Fe4 gave the highest CO selectivity in the series. Fifth, the article provides mechanistic insight by combining UV/Vis spectroscopy, DFT, TD-DFT, cyclic voltammetry, emission quenching studies, control experiments, and Hg poisoning tests. These data support a molecular homogeneous catalytic system, ligand-centered reductions in the iron complexes, and a photochemical cycle in which BIH efficiently quenches the excited photosensitizer. Sixth, the study reports that catalyst deactivation is mainly linked to photosensitizer degradation. Addition of fresh [Ru(bpy)3]2+ after 24 h restored CO2-to-CO conversion, supporting the conclusion that the iron catalyst remains comparatively robust under the reaction conditions. == Additional Remarks == The chemistry is relevant because photocatalytic conversion of CO2 to CO provides a route to a useful carbon feedstock using light as the energy input. CO is an industrially valuable intermediate. At the same time, this is a sacrificial photochemical system rather than a fully sustainable closed-cycle process. It requires BIH as a sacrificial electron donor and uses [Ru(bpy)3]2+ as the photosensitizer. Thus, although the catalyst itself is iron-based, the full system is not composed entirely of earth-abundant components. The reaction strongly depends on solvent composition. In completely anhydrous MeCN, CO formation is nearly suppressed. Moderate water content improves performance, but too much water lowers activity. The article attributes this decline partly to the poor solubility of BIH in more aqueous media. Competition with H2 evolution is present throughout the study, but the iron catalysts generally favor CO over H2. Selectivity depends on catalyst identity, catalyst loading, and water content. The article also highlights a practical limitation common in photochemical systems: long-term activity eventually levels off. Here, the main cause is reported to be deterioration of the photosensitizer rather than complete breakdown of the iron catalyst. == Content of the Published Article in Detail == The study examines a family of molecular iron(II) complexes of the general type [Fe(bpzRphen)(H2O)2]X2, where the tetradentate ligand is a bis(pyrazolyl)phenanthroline derivative. Four catalysts were studied: Fe1, Fe2, Fe3, and Fe4, which differ in the substituents on the pyrazolyl groups. === Molecular components of the photocatalytic system === The photocatalytic experiments use three main molecular components: * an iron complex as the CO2-reduction catalyst, * [Ru(bpy)3]2+ as the photosensitizer, * BIH as the sacrificial electron donor. The reactions were carried out in CO2-saturated MeCN/H2O. No significant amount of formate or CH4 was detected under the reported conditions. === Photocatalytic setup === The standard experiment used a borosilicate photoreactor containing 4.0 mL of solution with: * catalyst: 50 μM, * [Ru(bpy)3]2+: 0.3 mM, * BIH: 0.11 M, * solvent: CO2-saturated MeCN/H2O. The reaction vessel was purged with CO2 for 20 min and irradiated with blue light at 462 nm. Product gases in the headspace were analyzed by gas chromatography. Formate was checked by 1H NMR spectroscopy. === Spectroscopic and electronic structure observations === UV/Vis data show strong absorption bands in the ultraviolet region for the iron complexes. The article assigns the intense bands between about 300 and 350 nm mainly to ligand-centered π–π* transitions. Weaker red-shifted bands near 450–480 nm are attributed to forbidden transitions. DFT and TD-DFT calculations support high-spin quintet ground states for all four iron complexes and indicate that the frontier orbitals involved in reduction are largely ligand-based rather than strongly metal-centered. The article therefore interprets the observed reductions mainly as ligand-centered processes. === Electrochemical observations === Cyclic voltammetry of Fe1–Fe4 in MeCN showed two reduction waves for each complex. The article discusses two possible assignments in general terms, but the combination of electrochemistry and DFT supports predominantly ligand-centered reduction rather than formal stepwise Fe(II)/Fe(I)/Fe(0) reduction. The article further reports that when the voltammetry was limited to the potential range accessible to reduced [Ru(bpy)3]+, the first reduction products of the iron complexes were significantly more stable than suggested by scans to more negative potentials. Under CO2, the voltammograms changed relative to Ar, supporting reaction of reduced iron species with CO2. From these data, the article concludes that single-electron reduction of the iron complexes is sufficient to activate the catalyst toward CO2 reduction under the photocatalytic conditions. === Quenching and photochemical electron transfer === The article investigates quenching of excited [Ru(bpy)3]2+ by BIH and by the iron complexes using emission quenching and Stern–Volmer analysis. The data show that both BIH and the iron complexes quench the photosensitizer emission, but BIH is a much more efficient quencher. Its quenching constant is about an order of magnitude larger than those of the iron complexes. The article therefore supports a pathway in which BIH is the dominant quencher of the excited ruthenium photosensitizer. The computational orbital-energy analysis is consistent with this picture. The HOMO of BIH lies above that of [Ru(bpy)3]2+, so the article proposes reductive quenching of the excited photosensitizer by BIH. The reduced photosensitizer can then transfer electrons to the iron catalyst. The article also notes that oxidative quenching of the excited photosensitizer by the iron complexes is energetically feasible in principle because the iron-complex acceptor orbitals lie below the photosensitizer LUMO. However, the quenching data indicate that BIH is the dominant pathway under the catalytic conditions. === Proposed catalytic sequence === The article does not claim direct observation of all catalytic intermediates, but the combined data support the following mechanistic interpretation: # [Ru(bpy)3]2+ absorbs visible light and reaches its excited state. # BIH reductively quenches the excited photosensitizer. # The resulting reduced photosensitizer transfers an electron to the iron catalyst. # The iron complex undergoes ligand-centered reduction to generate a reduced catalytic state. # This reduced iron species reacts with CO2. # The article proposes proton-coupled electron-transfer steps in the reduction sequence. # Water helps stabilize catalytic intermediates and provides the proton source needed for productive CO formation. # CO is formed and released, while H2 evolution competes as a side reaction. The article specifically discusses Fe–COOH-type intermediates as relevant conceptual intermediates in proton-coupled CO2 reduction chemistry, but such species were not directly observed in this work. Their involvement is presented as mechanistically consistent with the need for water and proton transfer. === Role of water === Water plays a central chemical role in this system. In dry MeCN, the catalyst shows almost no CO production. With 7.5–10% water, both activity and CO selectivity increase sharply. The article states that water is important for effective proton-coupled electron transfer and for stabilization of intermediates. At higher water fractions, activity falls, which the article attributes in part to the poor solubility of BIH in more aqueous medium. === Products and selectivity === The main gaseous products are CO and H2. CO is the dominant carbon-containing product under productive conditions. No significant amount of formate or CH4 was detected. Among the catalyst series under the standard 24 h conditions, Fe2 gave the highest CO turnover number, while Fe4 gave the highest CO selectivity. Lower catalyst concentration substantially increased TONCO and often improved CO selectivity. === Control experiments and catalyst integrity === The article reports several important controls. * Without light, catalyst, photosensitizer, sacrificial donor, or CO2, no significant CO or H2 formation was observed. * Using Fe(ClO4)2 instead of the defined iron complex gave only minor product formation, showing that free Fe2+ is not responsible for the catalytic activity. * Hg poisoning experiments did not suppress catalysis, supporting the conclusion that the system remains homogeneous rather than nanoparticle-based. * When additional [Ru(bpy)3]2+ was added after 24 h, catalytic CO production was restored, indicating that loss of activity mainly results from photosensitizer degradation rather than from rapid destruction of the iron catalyst. == Catalyst == The catalysts are molecular homogeneous iron(II) complexes bearing bis(pyrazolyl)phenanthroline ligands. The four catalysts studied are: * Fe1 = [Fe(bpzphen)(H2O)2](BF4)2 * Fe2 = [Fe(bpzMe2phen)(H2O)2](BF4)2 * Fe3 = [Fe(bpzPhphen)(H2O)2](ClO4)2 * Fe4 = [Fe(bpzCF3phen)(H2O)2](ClO4)2 According to the article, all are high-spin Fe(II) complexes with distorted octahedral geometries. The tetradentate bis(pyrazolyl)phenanthroline ligand occupies four coordination sites, and two water molecules occupy the remaining positions. The electrochemical reductions are described as primarily ligand-centered. The catalytic behavior depends on the pyrazolyl substituent: * Fe2 gives the highest overall CO productivity in the series. * Fe4 gives the highest CO selectivity in the series. * Fe1 and Fe3 are less active under the reported standard conditions. The article also points out a special structural feature for Fe4: weak intramolecular H···F interactions involving the CF3 substituents and coordinated water ligands distort the geometry and may contribute to its enhanced CO selectivity. Mechanistic and control experiments indicate that these are robust homogeneous catalysts under the photocatalytic conditions tested. Some decomposition may occur, but the main source of deactivation is reported to be the photosensitizer rather than the iron catalyst. == Photosensitizer == The photosensitizer is [Ru(bpy)3]2+. Its role is to absorb visible light and generate an excited state that can enter the photoredox cycle. The article discusses the metal-to-ligand charge-transfer excited state and uses emission quenching experiments to probe how it reacts with BIH and with the iron complexes. The data support reductive quenching of excited [Ru(bpy)3]2+ by BIH as the dominant pathway. The reduced ruthenium species is then able to transfer electrons to the iron catalyst. The photosensitizer is effective for driving catalysis, but the article shows that it gradually degrades during extended irradiation. UV/Vis hypochromism after prolonged photolysis and restoration of activity upon adding more photosensitizer both support photosensitizer deterioration as the main cause of long-time deactivation. == Investigation == ```csv catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Fe1 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 987 , 41.1 , , , 187 , 7.8 , , , , H2O , Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 1318 , 54.9 , , , 243 , 10.1 , , , , H2O , Fe3 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 847 , 35.3 , , , 205 , 8.5 , , , , H2O , Fe4 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 1265 , 52.7 , , , 133 , 5.5 , , , , H2O , Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 4 , 311 , 77.7 , , , 51 , 12.8 , , , , H2O , Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 48 , 1578 , 32.9 , , , 296 , 6.2 , , , , H2O , Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 96 , 1593 , 16.6 , , , 300 , 3.1 , , , , H2O , Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 2 , not reported , , , 22 , not reported , , , , not reported , Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 1352 , 56.3 , , , 285 , 11.9 , , , , H2O , Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 661 , 27.5 , , , 191 , 8.0 , , , , H2O , Fe2 , 50.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 621 , 25.8 , , , 77 , 3.2 , , , , H2O , Fe2 , 25.0 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 2086 , 86.9 , , , 123 , 5.1 , , , , H2O , Fe2 , 12.5 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 4259 , 177.4 , , , 276 , 11.5 , , , , H2O , Fe2 , 6.25 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 10168 , 423.7 , , , 862 , 35.9 , , , , H2O , Fe2 , 3.12 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 23138 , 964.1 , , , 2177 , 90.7 , , , , H2O , Fe2 , 3.12 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 4 , 9754 , 2438 , 7.6 , , not reported , not reported , , , , H2O , ``` 20:06:02 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-74136-3 20:06:02 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Automated synthesis of InSb quantum dots with improved batch-to-batch reproducibility via kinetically matched co-reduction] 20:06:03 398728 AIClient - Response from AI: no 20:06:03 398728 CrossRefSearchJob - AI response: no 20:06:03 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-74136-3 20:06:03 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-74005-z 20:06:03 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Genomic and ecological drivers of parallel arid adaptation in tree grapes (Vitaceae)] 20:06:04 398728 AIClient - Response from AI: no 20:06:04 398728 CrossRefSearchJob - AI response: no 20:06:04 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-74005-z 20:06:04 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-74068-y 20:06:04 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [System-level integration of halide perovskite optoelectronics for its commercial deployment] 20:06:05 398728 AIClient - Response from AI: no 20:06:05 398728 CrossRefSearchJob - AI response: no 20:06:05 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-74068-y 20:06:05 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s42003-026-10425-3 20:06:05 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Neurobehavioural genes exert indirect genetic effects on blood lipid profiles through behavioural traits] 20:06:06 398728 AIClient - Response from AI: no 20:06:06 398728 CrossRefSearchJob - AI response: no 20:06:06 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s42003-026-10425-3 20:06:06 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-73352-1 20:06:06 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Abstract Crystallisation kinetics play a fundamental role in controlling conduit dynamics and eruptive style. The degree of superheating is critical in controlling crystallisation kinetics; however, its effect is still debated and has an unclear impact on eruption dynamics. Here, we investigate how superheating influences clinopyroxene nucleation in tephritic magmas from the 2021 Tajogaite eruption (La Palma, Spain) through both in situ and ex situ view experiments. Our findings show that superheating delays nucleation by dissolving pre-existing nuclei, thereby inhibiting crystallisation upon return to subliquidus conditions. Using a numerical model, we investigate how different nucleation delays resulting from different degrees of superheating affect magma ascent dynamics. Depending on the initial thermodynamic conditions and on the pre-eruptive history of magma, an increased nucleation delay can significantly reduce crystal content during ascent, lowering magma viscosity and affecting eruptive style. These findings highlight the critical role of pre-eruptive thermal histories in controlling eruptive style, and provide constraints for refining experimental protocols and numerical models, with direct implications for improving volcanic hazard assessment and eruption forecasting.] 20:06:07 398728 AIClient - Response from AI: no 20:06:07 398728 CrossRefSearchJob - AI response: no 20:06:07 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-73352-1 20:06:07 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-73995-0 20:06:07 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Anisodine hydrobromide targets matk and prevents delayed rtPA thrombolysis-induced vasogenic cerebral edema in ischemic stroke] 20:06:08 398728 AIClient - Response from AI: no 20:06:08 398728 CrossRefSearchJob - AI response: no 20:06:08 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-73995-0 20:06:08 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-74019-7 20:06:08 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Layer-number-parity-dependent abnormal magnetic ordering in few-layer CrI3 on N-face AlN substrate] 20:06:09 398728 AIClient - Response from AI: no 20:06:09 398728 CrossRefSearchJob - AI response: no 20:06:09 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-74019-7 20:06:09 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-73188-9 20:06:09 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Navigating polymorph generation and distilled-potential development via entropy-symmetry landscapes for metal plasticity mechanisms] 20:06:10 398728 AIClient - Response from AI: no 20:06:10 398728 CrossRefSearchJob - AI response: no 20:06:10 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-73188-9 20:06:10 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-74246-y 20:06:10 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Multi-scale structural engineering enables ultra-strong and tough eutectogels] 20:06:11 398728 AIClient - Response from AI: no 20:06:11 398728 CrossRefSearchJob - AI response: no 20:06:11 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-74246-y 20:06:11 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.3389/fmolb.2026.1857635 20:06:11 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Osteoarthritis is a common degenerative joint disease characterized by progressive cartilage degeneration, joint structural damage, and functional impairment. Despite its high prevalence, effective therapies capable of slowing structural progression remain limited. Increasing evidence suggests that mitochondrial quality control is a key mechanism in maintaining chondrocyte homeostasis and plays an important role in the development and progression of osteoarthritis. In osteoarthritis chondrocytes, mitochondrial quality control is mainly manifested through impaired mitochondrial biogenesis, dysregulated mitochondrial fusion and fission, abnormal mitophagy, and oxidative stress-related mitochondrial dysfunction. These alterations can lead to reduced ATP production, excessive reactive oxygen species accumulation, decreased mitochondrial membrane potential, enhanced chondrocyte senescence and apoptosis, and extracellular matrix degradation, thereby accelerating osteoarthritis progression. In recent years, traditional Chinese medicine-derived monomers have attracted increasing attention because of their relatively clear chemical composition and multitarget pharmacological activities. Accumulating studies indicate that TCM-derived monomers, such as quercetin, resveratrol, curcumin, baicalin, berberine, and icariin, can protect chondrocytes and delay osteoarthritis progression by regulating key processes involved in mitochondrial quality control. This review focuses on the role of mitochondrial quality control in osteoarthritis chondrocytes and summarizes current research on the protective effects of TCM-derived monomers from the perspectives of mitochondrial biogenesis, mitochondrial dynamics, mitophagy, and oxidative stress-related homeostasis, with the aim of providing a reference for future mechanistic studies and potential therapeutic development.] 20:06:13 398728 AIClient - Response from AI: no 20:06:13 398728 CrossRefSearchJob - AI response: no 20:06:13 398728 CrossRefSearchJob - Publication not relevant: 10.3389/fmolb.2026.1857635 20:06:13 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s42003-026-10426-2 20:06:13 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Cross trait analysis reveals shared genetic architecture of eight common female reproductive disorders] 20:06:14 398728 AIClient - Response from AI: no 20:06:14 398728 CrossRefSearchJob - AI response: no 20:06:14 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s42003-026-10426-2 20:06:14 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-74089-7 20:06:14 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Polarization reversal and ion-electron co-modulation in in-plane anisotropic AgVP2S6 for multimodal image processing] 20:06:15 398728 AIClient - Response from AI: no 20:06:15 398728 CrossRefSearchJob - AI response: no 20:06:15 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-74089-7 20:06:15 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.3389/fmolb.2026.1849064 20:06:15 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Glycosaminoglycans (GAGs) are a structurally and chemically diverse family of sulfated polysaccharides that constitute a major component of the neural extracellular matrix and cell surface proteoglycans, where they exert pivotal regulatory functions in axon growth, guidance, synaptic organization, and regeneration. By forming highly specific and context-dependent interactions with axonal receptors, GAGs orchestrate the spatial patterning and temporal dynamics of signaling events after injury. Accumulating evidence indicates that the biological activities of GAGs are not dictated merely by their presence but are finely tuned by their sulfation codes, chain length, and domain organization. Recent mechanistic studies have revealed that distinct GAG species, particularly chondroitin sulfate (CS) and heparan sulfate (HS), exert opposing effects on axonal behavior through shared receptor systems. In the injured central nervous system (CNS), CS-rich extracellular matrices, prominently associated with reactive astrocytes and perineuronal nets, act as potent inhibitors of axon regeneration. These inhibitory effects are mediated through selective engagement of receptors such as protein tyrosine phosphatase sigma (PTPσ) leading to suppression of cytoskeletal dynamics and growth cone motility. In contrast, specific HS motifs promote axon elongation by inhibiting PTPσ. Based on these insights, therapeutic strategies targeting GAG biology have gained considerable attention. Approaches such as enzymatic digestion of inhibitory CS chains, development of synthetic or biomimetic GAGs, modulation of sulfation patterns, and gene editing of GAG-modifying enzymes have demonstrated encouraging efficacy in preclinical models of spinal cord injury, traumatic brain injury, and neurodegenerative disorders. Together, these findings indicate GAGs not only as passive structural components but as active, druggable regulators of axon growth and regeneration. This review integrates current advances in GAG structural biology, receptor interactions, and enzymatic regulation to provide a comprehensive framework for understanding how GAGs govern axonal behavior. We highlight unresolved questions and emerging opportunities for exploiting GAG-mediated mechanisms as actionable targets for next-generation neurorestorative therapies.] 20:06:16 398728 AIClient - Response from AI: no 20:06:16 398728 CrossRefSearchJob - AI response: no 20:06:16 398728 CrossRefSearchJob - Publication not relevant: 10.3389/fmolb.2026.1849064 20:06:16 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s42003-026-10471-x 20:06:16 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [The peptidoglycan-binding domain regulates antimycobacterial activity of LysB by affecting its transportation and/or catalytic activity] 20:06:17 398728 AIClient - Response from AI: no 20:06:17 398728 CrossRefSearchJob - AI response: no 20:06:17 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s42003-026-10471-x 20:06:17 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.3390/inorganics14060157 20:06:17 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Solar cell efficiency depends on both photogeneration and charge collection, with the active layer playing a key role in these processes. In organic solar cells (OSCs), where power conversion efficiency (PCE) remains relatively low, understanding the influence of active layer and metal contact thickness on device performance is essential. In this work, we investigate the effect of P3HT:PCBM and Ag thickness on OSC performance by analyzing the evolution of electrical parameters obtained from J-V measurements over five weeks, with particular attention given to resistance-related degradation behavior. The analyzed OSCs had a cell structure composed of Ag/P3HT:PCBM/TiO2/ITO/glass, and each material was corroborated by XRD and Raman spectroscopy. The thickness of P3HT:PCBM was modulated by varying the number of spin-coated layers from 1 to 3 (ranging from 75 to 160 nm). This variation increases light absorption, as demonstrated by the optical transmittance spectra. However, device degradation became evident after the third week of fabrication, mainly due to an increase in series resistance, which adversely affected the open-circuit voltage (VOC), fill factor (FF), and overall device efficiency. The best performance was obtained for devices fabricated with two P3HT:PCBM layers and 18 mg of Ag, achieving a maximum PCE of 0.5%.] 20:06:18 398728 AIClient - Response from AI: no 20:06:18 398728 CrossRefSearchJob - AI response: no 20:06:18 398728 CrossRefSearchJob - Publication not relevant: 10.3390/inorganics14060157 20:06:18 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-73019-x 20:06:18 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Metacrystals: inversely-designed 3D-printed intelligent panels for 6G communications] 20:06:19 398728 AIClient - Response from AI: no 20:06:19 398728 CrossRefSearchJob - AI response: no 20:06:19 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-73019-x 20:06:19 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.3389/fmolb.2026.1852346 20:06:19 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Editorial: Iron dysregulation, oxidative stress, and inflammation: mechanisms and therapeutic insights] 20:06:20 398728 AIClient - Response from AI: no 20:06:20 398728 CrossRefSearchJob - AI response: no 20:06:20 398728 CrossRefSearchJob - Publication not relevant: 10.3389/fmolb.2026.1852346 20:06:20 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.3390/inorganics14060156 20:06:20 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [B-site ordering of Li-modified Pb0.95Li0.05(Yb1/2Nb1/2)O3 (PLYN) ceramics can be changed by duration during sintering. In this paper, the conventional solid-state reaction method was employed to prepare antiferroelectric perovskite Li-substituted PLYN ceramics. Crystal structure evolution dependence of sintering time was investigated using X-ray diffraction (XRD), Raman spectroscopy, and dielectric response. Two dielectric anomalies responses, attributed to the transition from B-site order to disorder and antiferroelectric-paraelectric phase transition depend on B-site ordering. The high-temperature dielectric relaxation associated with charged carries (oxygen-vacancy hopping) was characterized by isothermal electric modulus and universal dielectric response. Impedance spectroscopy was used to uncover the relationship between defect type and the oxygen partial pressure (pO2) dependence on sintering time in PLYN systems. These findings provide new insights into the interplay among B-site ordered phase structure, dielectric response, and defect types.] 20:06:21 398728 AIClient - Response from AI: no 20:06:21 398728 CrossRefSearchJob - AI response: no 20:06:21 398728 CrossRefSearchJob - Publication not relevant: 10.3390/inorganics14060156 20:06:21 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.3389/fchem.2026.1884133 20:06:21 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Editorial: Bioactive natural products for health: isolation, structural elucidation, biological evaluation, structure-activity relationship, and mechanism, volume II] 20:06:22 398728 AIClient - Response from AI: no 20:06:22 398728 CrossRefSearchJob - AI response: no 20:06:22 398728 CrossRefSearchJob - Publication not relevant: 10.3389/fchem.2026.1884133 20:06:22 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-73848-w 20:06:22 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Abstract Chemically inducible expression systems enable transgene expression regulation in response to external small molecules. Tetracycline repressor (TetR)-based gene switches work in plants, but antibiotics are neither approved nor advisable for crop use. Here we report engineering of TetR mutants that respond to approved sulfonylurea (SU) herbicides instead of antibiotics. Designed variants show low-nanomolar EC 50 values for ethametsulfuron-methyl (Es) or chlorsulfuron and tightly bind the Tet operator sequence, but only in the absence of corresponding SUs. Crystal structures of two repressors in complex with their respective SU ligands reveal extensive interactions explaining their strong binding. The Es repressor-based gene switch is introduced into tobacco, soybean, maize, rice, and Arabidopsis , and robust reporter gene activation is observed upon herbicide application. Addition of a repressor-regulated siRNA targeting the repressor transcript increases the magnitude and spatial distribution of the response following herbicide treatment and results in a partially bistable gene switch. The SU repressors also function well in mammalian cell culture and may enable regulation of additional genes in conjunction with TetR. ] 20:06:25 398728 AIClient - Response from AI: no 20:06:25 398728 CrossRefSearchJob - AI response: no 20:06:25 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-73848-w 20:06:25 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s42003-026-10386-7 20:06:25 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Structural insights into ubiquitin recognition by USP15 revealed through a covalent activity-based probe] 20:06:26 398728 AIClient - Response from AI: no 20:06:26 398728 CrossRefSearchJob - AI response: no 20:06:26 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s42003-026-10386-7 20:06:26 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s42003-026-10233-9 20:06:26 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Abstract Arachidonic acid lipoxygenases (ALOX-isoforms) have been implicated in cell differentiation and in the pathogenesis of various diseases. Human ALOX-isoforms prefer free polyunsaturated fatty acids as substrate but some of them are also capable of oxygenating complex ester lipids. Here we compared the reactivity of mammalian ALOX isoforms with complex lipid structures, explored the chemistry of the oxygenation products and characterized the structure of the enzyme-substrate complexes. We found that human and mouse ALOX15 orthologs as well as human ALOX15B are capable of oxidizing complex substates in the absence of adapter proteins and that the patterns of oxygenation products were similar to those of free fatty acid oxygenation. In contrast, the corresponding activities of mouse Alox15b and human ALOX12 were limited. Specific lipoxygenase products were also detected in the plasma lipids of mice with modified ALOX15 gene suggesting the in vivo activity of the enzyme on complex ester lipid substrates. ] 20:06:27 398728 AIClient - Response from AI: no 20:06:27 398728 CrossRefSearchJob - AI response: no 20:06:27 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s42003-026-10233-9 20:06:27 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-74086-w 20:06:27 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Abstract Spatial organization within bacterial communities plays a critical role in mediating cell-cell interactions and determining microbial fitness. During infection, Vibrio cholerae undergoes dynamic restructuring of its spatial organization, forming monospecific aggregates thought to enhance survival in the face of the host immune system. However, the effectiveness of its primary weapon against other bacteria—its contact-dependent type VI secretion system (T6SS)—is severely limited in this aggregated form, hampering its ability to compete for space and resources. Here, we show that the presence of competing, co-resident bacteria alters V. cholerae aggregation by modulating toxin co-regulated pilus (TCP) expression through production of interspecies quorum sensing signal autoinducer-2 (AI-2). Using a zebrafish infection model, we found that this quorum sensing-controlled disaggregation enhances the efficacy of T6SS-mediated killing in vivo by promoting intermixing of V. cholerae , thereby increasing cell-cell contact with competitors. This modulation of aggregation has no impact on T6SS activity in vitro, highlighting the context-specific nature of these interactions. We developed a mathematical model to explore these dynamics and observed a fundamental trade-off between potency of V. cholerae T6SS and its sensitivity to the presence of competing bacterial species. Our findings reveal a core mechanism underlying V. cholerae colonization wherein it uses quorum sensing to dynamically balance between protective aggregation to survive host defenses and dispersed infiltrative intermixing to facilitate elimination of competitors. ] 20:06:28 398728 AIClient - Response from AI: no 20:06:28 398728 CrossRefSearchJob - AI response: no 20:06:28 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-74086-w 20:06:28 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-72769-y 20:06:28 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Abstract Strongly correlated topological phases of matter are central to modern condensed matter physics and quantum information technology but often challenging to probe and control in material systems. The experimental difficulty of accessing these phases has motivated the use of engineered quantum platforms for simulation and manipulation of exotic topological states. Among these, the Laughlin state stands as a cornerstone for topological matter, embodying fractionalization, anyonic excitations, and incompressibility. Although its bosonic analogs have been realized on programmable quantum simulators, a genuine fermionic Laughlin state has yet to be demonstrated on a quantum processor. Here, we realize the ν  = 1/3 fermionic Laughlin state on IonQ’s trapped-ion quantum computer using an efficient and scalable Hamiltonian variational ansatz with 369 two-qubit gates on a 16-qubit circuit. Employing symmetry-verification error mitigation, we extract key observables that characterize the Laughlin state, including correlation hole, bulk-edge correspondence, and topological entanglement entropy, with strong agreement to exact diagonalization benchmarks. This work demonstrates an end-to-end workflow to simulate material-intrinsic topological orders and provides a starting point to explore its dynamics and excitations on digital quantum processors. ] 20:06:29 398728 AIClient - Response from AI: no 20:06:29 398728 CrossRefSearchJob - AI response: no 20:06:29 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-72769-y 20:06:29 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.3762/bjoc.22.69 20:06:29 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [ The enantioselective Michael reactions of benzophenone-imine of glycine esters with phenol- and benzofuran-derived α,β-unsaturated pyrazolamides have been realized by using a chiral cyclopropenimine (Lambert catalyst, CSB-1 ) as an organocatalyst. In the presence of 20 mol % CSB-1 , the Michael adducts were obtained in up to 85% yield and 98% ee under mild conditions. The configurations of these Michael products were deduced by X-ray single crystal diffraction of a pyroglutamic acid ester containing two adjacent stereocenters, which was obtained from in-situ acidic hydrolysis and lactamization of the corresponding Michael product. ] 20:06:30 398728 AIClient - Response from AI: no 20:06:30 398728 CrossRefSearchJob - AI response: no 20:06:30 398728 CrossRefSearchJob - Publication not relevant: 10.3762/bjoc.22.69 20:06:30 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-72491-9 20:06:30 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Reinforcement learning in linear embedding space unlocks generalizable control across soft robot configurations] 20:06:32 398728 AIClient - Response from AI: no 20:06:32 398728 CrossRefSearchJob - AI response: no 20:06:32 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-72491-9 20:06:32 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-74072-2 20:06:32 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Abstract Direct electron transfer (ETP) during peroxymonosulfate (PMS) activation enables selective, matrix-resistant organic contaminants oxidation, yet its precise control over competing radical pathways remains elusive. Here we report a nano-island-like single-atom catalyst- carbon nitride islands immobilize cobalt single atoms on reduced graphene oxide (CoN 3 C/rGO)- that leverages an island-sea architecture to direct PMS activation toward ETP. Experimental and density functional theory (DFT) analyses show an rGO induced elevation of the Co d -band center and a sharpened d z2 orbital near the Fermi level, promoting directional hybridization with PMS p orbitals and suppressing antibonding occupation. Consequently, CoN 3 C/rGO/PMS degrade bisphenol A (BPA) completely within 5 min, with ~94% contribution from ETP. Furthermore, catalytic membrane coatings enable stable 100 h continuous operation in diverse real water matrices with minimal Co leaching. Our results demonstrate a design principle-orbital-level modulation via island-sea architectures to reconcile activity and selectivity in Fenton-like systems and advance translating practical water treatment technologies based on single-atom electronic control. ] 20:06:32 398728 AIClient - Response from AI: no 20:06:32 398728 CrossRefSearchJob - AI response: no 20:06:32 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-74072-2 20:06:32 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1002/celc.70240 20:06:32 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [ A metal‐free electrochemical protocol for desulfurization of aryl thioacetals into alkanes under ambient conditions is reported. The method is fully selective for C( sp 3 )─S bond cleavage, serving as an electrochemical alternative to Mozingo reduction via intermediate formation of thioethers. With a switch of solvent, the transformation enables the formation of deuterated products. ] 20:06:33 398728 AIClient - Response from AI: no 20:06:33 398728 CrossRefSearchJob - AI response: no 20:06:33 398728 CrossRefSearchJob - Publication not relevant: 10.1002/celc.70240 20:06:33 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-73443-z 20:06:33 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Abstract Light beams carrying orbital angular momentum (OAM) possess an unbounded set of orthogonal modes, offering significant potential for optical communication and security. However, exploiting OAM beams in space has been hindered by the lack of a versatile design toolkit. Here, we demonstrate a strategy to tailor OAM across multiple transverse planes by shaping optical caustics leveraging on catastrophe theory. With 3D-printed metasurfaces fabricated using two-photon polymerization lithography, we construct these caustics to steer Poynting vectors and achieve arbitrary shapes of OAM beams. Interestingly, we further realize “hidden” OAM along the propagation trajectory, where the intensity of the beam is spread out thus avoiding detection. By exploiting this intrinsic nature of OAM, we demonstrate the detection of encoded information in optical encryption. Our approach provides a unique framework for dynamic control of OAM in space, with promising applications in optical trapping and sensing, high-capacity data storage, and optical information security.] 20:06:34 398728 AIClient - Response from AI: no 20:06:34 398728 CrossRefSearchJob - AI response: no 20:06:34 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-73443-z 20:06:34 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s42003-026-10438-y 20:06:34 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Abstract Anticyclonic eddies (ACEs) restructure resources and drive trophic cascades, yet depth-resolved effects on nanoflagellate bacterivory remain unclear. We quantify bacterivory by phago-mixotrophic nanophytoplankton (PMNP) and heterotrophic nanoflagellate (HNF) using fluorescent-bead incubations in a warm-core ACE in the South China Sea. Despite a 16% decline in nanoeukaryotes, PMNP abundance increases significantly (2.8× surface, 1.4× deep chlorophyll maximum (DCM), shifts toward larger cells, and elevates bacterial turnover and phago-mixotrophic production. HNF community grazing also increases at both euphotic depths despite similar per-cell rates, yielding impacts comparable to PMNP. Structural equation models link PMNP grazing to surface water-mass properties and nutrients and DCM turbidity, whereas HNF grazing tracks water-mass and prey/virus dynamics. In the mesopelagic zone, HNFs dominate; grazing HNF abundance increases 2.7× at 500 m and is associated with particulate beam attenuation coefficient, an in situ particle proxy. These findings reveal a depth-partitioned response coupling mesoscale forcing to microbial carbon processing.] 20:06:35 398728 AIClient - Response from AI: no 20:06:35 398728 CrossRefSearchJob - AI response: no 20:06:35 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s42003-026-10438-y 20:06:35 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s42003-026-10428-0 20:06:35 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [The signaling and regulatory functions of dying cells and cell corpses] 20:06:36 398728 AIClient - Response from AI: no 20:06:36 398728 CrossRefSearchJob - AI response: no 20:06:36 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s42003-026-10428-0 20:06:36 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-73475-5 20:06:36 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Abstract Traces of HIV-1 RNA can persist in plasma despite long-term suppressive antiretroviral therapy (ART). Some individuals develop nonsuppressible viremia (NSV), characterized by detectable HIV-1 RNA that raises concerns for virological failure, pathogenesis, and transmission. The sources of NSV remain poorly defined, in part due to limited tools to characterize plasma HIV-1 RNA. Both infectious and defective proviruses, including those with defects in the 5′ Leader (5′L), can contribute to NSV, but their relative contributions have not been quantified. Here we show that in over 50 participants, plasma viremia is markedly driven by highly clonal HIV-1 RNA populations carrying defects in the 5′L. Across individuals, dominant clones with 5′L defects clustered around the major splice donor (MSD) accounted for the vast majority of circulating HIV-1 RNA. To enable rapid, scalable profiling, we developed CLAWS (Capturing 5′ Leader Anomalies Without Sequencing), a digital PCR assay that distinguishes intact from defective 5′L RNA. CLAWS recapitulated sequencing-based estimates and detected low-abundance defective RNA early after ART initiation, revealing that defective genomes emerge early and become predominant during long-term therapy. These findings identify 5′L-defective genomes as the predominant driver of NSV and establish CLAWS as a practical tool for monitoring viremia in clinical and cure-related settings.] 20:06:37 398728 AIClient - Response from AI: no 20:06:37 398728 CrossRefSearchJob - AI response: no 20:06:37 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-73475-5 20:06:37 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1021/jacsau.6c00708 20:06:37 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Targeted Protein Degradation] 20:06:38 398728 AIClient - Response from AI: no 20:06:38 398728 CrossRefSearchJob - AI response: no 20:06:38 398728 CrossRefSearchJob - Publication not relevant: 10.1021/jacsau.6c00708 20:06:38 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-73977-2 20:06:38 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Gene dependency-informed inference of response to targeted cancer therapies] 20:06:39 398728 AIClient - Response from AI: no 20:06:39 398728 CrossRefSearchJob - AI response: no 20:06:39 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-73977-2 20:06:39 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-74083-z 20:06:39 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Abstract Lewy bodies, the defining pathological feature of Parkinson’s disease, are intraneuronal inclusions enriched in aggregated alpha-synuclein (αSyn). We used correlative light and electron microscopy to selectively investigate phosphorylated αSyn (αSyn pS129 )-positive inclusions in the substantia nigra of end-stage postmortem Parkinson’s disease brain. Here we show that somatic αSyn pS129 inclusions in nigral dopaminergic neurons are consistently fibrillar, whereas the membranous-type inclusions are restricted to neuritic processes. These neuritic inclusions displayed marked ultrastructural heterogeneity, ranging from predominantly membranous to mixed membranous-fibrillar forms. The selective targeting of defined inclusions enabled detailed structural characterization of Lewy pathology, rather than quantitative or disease-stage comparisons. Our findings highlight clear ultrastructural differences between somatic and neuritic αSyn pS129 pathology and demonstrate the structural complexity and heterogeneity of Lewy pathology in human Parkinson’s disease brain. ] 20:06:40 398728 AIClient - Response from AI: no 20:06:40 398728 CrossRefSearchJob - AI response: no 20:06:40 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-74083-z 20:06:40 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.3390/inorganics14060155 20:06:40 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Azolium-derived metallates are well-established intermediates in metal–N-heterocyclic carbene chemistry; however, their potential as standalone therapeutic agents remains largely unexplored. Herein, we report the first systematic biological investigation of a diverse family of Au(I), Cu(I), Pt(II), Pd(II), and Ru(II) metallates paired with functionalized azolium cations. The complexes were synthesized quantitatively through a simple, atom-economical, and purification-free protocol under aerobic conditions in technical-grade green solvents. Structural characterization by multinuclear NMR spectroscopy and single-crystal X-ray diffraction confirmed metallate formation and enabled the first isolation and crystallographic characterization of unprecedented azolium-derived ruthenates. The antiproliferative activity of the complexes was evaluated against cisplatin-sensitive (A2780) and cisplatin-resistant (A2780cis) ovarian cancer cell lines, alongside non-cancerous MRC-5 fibroblasts. Backbone-functionalized derivatives emerged as the most potent compounds, displaying activities comparable or superior to cisplatin in A2780 cells and up to 1000-fold higher potency in the resistant A2780cis model. Notably, unlike cisplatin, the metallates retained nearly unchanged IC50 values across both ovarian cancer lines, strongly suggesting resistance-evasive mechanisms of action. While benzylazido- and methyl guanosine-derived complexes generally exhibited lower overall potency, several members retained significant activity in resistant cells while showing markedly reduced toxicity toward normal fibroblasts, highlighting promising selectivity profiles. Ethoxide-functionalized derivatives and platinum-based metallates combined pronounced anticancer activity with favourable therapeutic windows. Overall, this work establishes azolium-derived metallates as a previously overlooked class of metal-based anticancer agents combining exceptional synthetic accessibility, broad structural tunability, and remarkable activity against platinum-resistant ovarian cancer.] 20:06:41 398728 AIClient - Response from AI: no 20:06:41 398728 CrossRefSearchJob - AI response: no 20:06:41 398728 CrossRefSearchJob - Publication not relevant: 10.3390/inorganics14060155 20:06:41 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-74051-7 20:06:41 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Intermolecular interactions optimization in weakly solvating ether solvents for wide-temperature Na metal batteries] 20:06:42 398728 AIClient - Response from AI: no 20:06:42 398728 CrossRefSearchJob - AI response: no 20:06:42 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-74051-7 20:06:42 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s42003-026-10392-9 20:06:42 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Unraveling hidden species diversity of talpid moles using phylogenomics and skull-based deep learning] 20:06:43 398728 AIClient - Response from AI: no 20:06:43 398728 CrossRefSearchJob - AI response: no 20:06:43 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s42003-026-10392-9 20:06:43 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-73992-3 20:06:43 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [TMEM63B regulates nucleocytoplasmic transport and placental development] 20:06:44 398728 AIClient - Response from AI: no 20:06:44 398728 CrossRefSearchJob - AI response: no 20:06:44 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-73992-3 20:06:44 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s42003-026-10479-3 20:06:44 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Mitochondria as convergence hubs for innate immunity pathways] 20:06:45 398728 AIClient - Response from AI: no 20:06:45 398728 CrossRefSearchJob - AI response: no 20:06:45 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s42003-026-10479-3 20:06:45 398728 CrossRefSearchJob - CrossRefSearchJob with doi 10.1038/s41467-026-74131-8 20:06:45 398728 AIClient - Request to AI with prompt: 'Given the following abstract of the publication, is it relevant to any of the following subcategories? Answer with either: yes, no or maybe. If yes or maybe, please provide also the subcategory after a semicolon. Subcategories: CO2 conversion CO conversion Chemicals used as sacrificial electron donor Host-Guest interactions in supramolecular chemistry Photocatalytic CO2 conversion Electrochemical CO2 conversion Homogeneous photocatalytic CO2 conversion Heterogeneous photocatalytic CO2 conversion Photocatalytic CO2 conversion to CO Photocatalytic CO2 conversion to HCOOH Photocatalytic CO2 conversion to CH4 Homogeneous electrochemical CO2 conversion Heterogeneous electrochemical CO2 conversion' and documents [Full-color 3D visualization with Janus metafiber] 20:06:46 398728 AIClient - Response from AI: no 20:06:46 398728 CrossRefSearchJob - AI response: no 20:06:46 398728 CrossRefSearchJob - Publication not relevant: 10.1038/s41467-026-74131-8 21:04:02 400436 PublicationImportJob - prompt for AI: [SYSTEM-LIKE INSTRUCTIONS] You are a highly conservative scientific information extractor and formatter. Your primary goal is factual fidelity to the attached article. You must extract only what is explicitly supported by the article. Never guess, reconstruct, or “complete” missing scientific data from general chemistry knowledge. When a value is unclear, ambiguous, inconsistent, or not explicitly stated, output "not reported". Core extraction policy: - Correctness is more important than completeness. - Unit normalization must be exact. - Never confuse catalyst, photosensitizer, sacrificial electron donor, solvent, additive, proton source, irradiation wavelength, or product metric. - Values should only be converted when the article provides a clear and scientifically reliable basis for conversion. - Never infer absolute concentrations from mol% unless the absolute concentration is explicitly stated. - Never infer TON CO from yield, selectivity, graph shape, or discussion text unless the TON CO value itself is explicitly reported or unambiguously readable. - Never replace a wavelength range with a single wavelength. - Never merge data across figures, tables, or sections unless the article clearly shows that they refer to the same experiment. - Never include bibliographic metadata in the output. Formatting policy: - Follow the requested section titles exactly. - Output only the requested final formatted content. - Use "not reported" for unsupported entries. - Do not mention uncertainty analysis, self-checking, or extraction workflow in the final answer. Before finalizing, silently verify: - catalyst concentration is in µM - photosensitizer concentration is in mM - electron donor concentration is in M - excitation wavelength is in nm - TON CO refers only to CO - no unsupported claim has been added - no bibliographic metadata is present [TASK] Read the attached scientific article and convert it into a structured educational chemistry wiki entry about a molecular photocatalytic CO2 reduction system. TASK Produce a scientifically accurate, teaching-oriented summary in MediaWiki format for advanced undergraduate chemistry students. Focus strictly on the chemistry, mechanism, photocatalytic setup, components, and reported results. CONTENT RESTRICTIONS - Use only information explicitly supported by the attached article. - Do NOT include author names, affiliations, journal name, year, DOI, citation labels, references, page numbers, or any publication metadata. - Do NOT speculate. - Do NOT fill missing values from chemical intuition or standard literature practice. - Whenever a requested value is missing, ambiguous, or not explicitly reported, write: "not reported". STYLE REQUIREMENTS - Use proper MediaWiki markup. - Use accessible but precise scientific language. - Keep the explanation educational, technically correct, and chemically specific. - Avoid unnecessary jargon, but do not oversimplify. - Distinguish clearly between established experimental observations and proposed mechanistic interpretation. OUTPUT REQUIREMENTS - Return only the final MediaWiki-formatted entry. - Use exactly the section headings below, in exactly the same order. - Do not add extra sections. - The final section, "Investigation", must contain CSV data inside a plain fenced code block. Use exactly this structure: == Abstract Summary == Provide a concise overview of the scientific goal, the photocatalytic system, and the main findings. State what was converted, what kind of photocatalytic system was used, and what the main outcome was. == Advances and Special Progress == Explain the key scientific advances compared with earlier molecular photocatalytic CO2 reduction systems. Focus on scientifically meaningful progress such as: - higher activity, - improved CO selectivity, - improved compatibility with water or mixed solvents, - unusual catalyst design, - mechanistic insight, - improved durability, - use of earth-abundant components, - unusual electron-transfer design, - better coupling between catalyst and photosensitizer. Only mention advances that are supported by the article itself. == Additional Remarks == Provide important contextual remarks relevant to the chemistry and significance of the work. Examples may include: - sustainability relevance of CO2-to-CO photoreduction, - strengths and limitations of sacrificial photochemical systems, - dependence on noble-metal photosensitizers, - solvent limitations, - water tolerance, - competition with H2 evolution, - catalyst decomposition, - low long-term durability, - mechanistic elegance versus practical limitations. Keep this section balanced, factual, and chemically relevant. == Content of the Published Article in Detail == Write a clear, teaching-oriented explanation of the scientific content of the article. Include, where supported by the article: - the molecular components of the system, - how the photocatalytic experiment is set up, - what happens after light absorption by the photosensitizer, - whether reductive or oxidative quenching is proposed, - how the sacrificial electron donor participates, - how electrons are transferred to the catalyst, - what reduced catalyst states are proposed or observed, - how CO2 activation and reduction are described, - how CO is formed and released, - whether proton transfer is involved, - what side products are observed or suppressed, - what control experiments or spectroscopic/electrochemical studies support the mechanism. Mechanistic explanation rules: - Explain the mechanism in words. - Be chemically accurate. - Distinguish proposed intermediates from directly observed intermediates. - Use cautious wording where appropriate, such as "the article proposes" or "the data support". - Do not overstate mechanistic certainty. Possible supporting evidence may include: - Stern-Volmer quenching, - emission quenching, - transient absorption, - UV/Vis spectroscopy, - cyclic voltammetry, - spectroelectrochemistry, - control experiments omitting one component, - atmosphere controls, - product analysis, - catalyst comparison studies. == Catalyst == Describe the catalyst in a compact but chemically informative way. Include only details explicitly supported by the article, such as: - exact catalyst identity, - catalyst class, - metal center, - oxidation state if stated, - ligand family or coordination environment, - whether it is mononuclear, dinuclear, supramolecular, macrocyclic, polypyridyl, porphyrinic, or another named class, - whether it is molecular, immobilized, or heterogeneous, - catalytic role in CO2 reduction, - special redox or structural properties relevant to function, - selectivity-related features, - stability or decomposition issues relevant to performance. Do not invent structural details beyond what the article actually states or names. == Photosensitizer == Describe the photosensitizer in the same style. Include only details explicitly supported by the article, such as: - exact identity, - photosensitizer class, - light-harvesting role, - excited-state function, - whether it undergoes reductive or oxidative quenching, - relevant redox or photophysical properties if explicitly discussed, - why it is suitable in this system, - any stability or photobleaching issues if reported. If multiple photosensitizers are compared, identify the main one clearly and mention others only when relevant data are reported. == Investigation == Provide the core photocatalytic experiments as ONE fenced code block that starts with ```csv and ends with ```. The block must be plain CSV — no markdown table, no JSON, no text before or after it inside the block. The header row MUST be EXACTLY these columns, in this order: catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Extraction rules for the CSV: - One row per distinct experimental condition explicitly reported. Take the main photocatalytic performance table first, and add control / condition-variation rows when they are explicitly reported. Include EVERY distinct experiment — do not summarise or collapse rows. - Report numbers as bare values (no unit text) in exactly these units, converting only when the article gives a clear basis: cat conc = µM; PS conc = mM; e-D conc = M; H-D conc = M; Temperature = °C; λexc = nm; irr time = h; Turnover_frequency__* = h^-1; Quantum_yield__* = %. - catalyst, PS (photosensitizer), e-D (sacrificial electron donor), H-D (hydrogen/proton donor): use the identity (name or abbreviation) exactly as given in the article. Keep names consistent across rows. Never swap catalyst, photosensitizer, electron donor, hydrogen donor, solvent, or additive. - Turnover_number__X, Turnover_frequency__X, Quantum_yield__X are per product X (CO, CH4, H2, HCOOH). Put each product's value in its own column; never substitute CO yield, selectivity, total TON, or a value read from a graph. - For a solvent mixture, give solvent A/B/C and the ratio in solvent-ratio (for example 4:1). Keep additives out of the solvent fields. - Keep a wavelength range as a range (for example 420-650); a monochromatic source is a single nm value. - Leave a cell EMPTY only when the article does not state the value. Never invent, guess, reconstruct, or infer a value from general knowledge, figures, or discussion — every value must be explicitly supported by the article. - Do NOT use a value that appears only in the supporting information unless the main text also states it. - Never put a comma inside a cell (commas separate columns); use a space or a slash instead. - Do not add, remove, rename, or reorder columns. Before output, silently verify: section headings match exactly; no bibliographic metadata; units are as specified above; catalyst and photosensitizer are not swapped; no unsupported value was added; one row per distinct experiment. Return only the final MediaWiki entry with the CSV code block in the Investigation section. 21:04:05 400436 AIClient - Uploaded file: 1-s2.0-S0021951726000072-main_6a26f4fbac4be.pdf, id: file-RMFu2Xw8oLTNePJDc9RGLi 21:04:05 400436 AIClient - Request to AI with prompt: '[SYSTEM-LIKE INSTRUCTIONS] You are a highly conservative scientific information extractor and formatter. Your primary goal is factual fidelity to the attached article. You must extract only what is explicitly supported by the article. Never guess, reconstruct, or “complete” missing scientific data from general chemistry knowledge. When a value is unclear, ambiguous, inconsistent, or not explicitly stated, output "not reported". Core extraction policy: - Correctness is more important than completeness. - Unit normalization must be exact. - Never confuse catalyst, photosensitizer, sacrificial electron donor, solvent, additive, proton source, irradiation wavelength, or product metric. - Values should only be converted when the article provides a clear and scientifically reliable basis for conversion. - Never infer absolute concentrations from mol% unless the absolute concentration is explicitly stated. - Never infer TON CO from yield, selectivity, graph shape, or discussion text unless the TON CO value itself is explicitly reported or unambiguously readable. - Never replace a wavelength range with a single wavelength. - Never merge data across figures, tables, or sections unless the article clearly shows that they refer to the same experiment. - Never include bibliographic metadata in the output. Formatting policy: - Follow the requested section titles exactly. - Output only the requested final formatted content. - Use "not reported" for unsupported entries. - Do not mention uncertainty analysis, self-checking, or extraction workflow in the final answer. Before finalizing, silently verify: - catalyst concentration is in µM - photosensitizer concentration is in mM - electron donor concentration is in M - excitation wavelength is in nm - TON CO refers only to CO - no unsupported claim has been added - no bibliographic metadata is present [TASK] Read the attached scientific article and convert it into a structured educational chemistry wiki entry about a molecular photocatalytic CO2 reduction system. TASK Produce a scientifically accurate, teaching-oriented summary in MediaWiki format for advanced undergraduate chemistry students. Focus strictly on the chemistry, mechanism, photocatalytic setup, components, and reported results. CONTENT RESTRICTIONS - Use only information explicitly supported by the attached article. - Do NOT include author names, affiliations, journal name, year, DOI, citation labels, references, page numbers, or any publication metadata. - Do NOT speculate. - Do NOT fill missing values from chemical intuition or standard literature practice. - Whenever a requested value is missing, ambiguous, or not explicitly reported, write: "not reported". STYLE REQUIREMENTS - Use proper MediaWiki markup. - Use accessible but precise scientific language. - Keep the explanation educational, technically correct, and chemically specific. - Avoid unnecessary jargon, but do not oversimplify. - Distinguish clearly between established experimental observations and proposed mechanistic interpretation. OUTPUT REQUIREMENTS - Return only the final MediaWiki-formatted entry. - Use exactly the section headings below, in exactly the same order. - Do not add extra sections. - The final section, "Investigation", must contain CSV data inside a plain fenced code block. Use exactly this structure: == Abstract Summary == Provide a concise overview of the scientific goal, the photocatalytic system, and the main findings. State what was converted, what kind of photocatalytic system was used, and what the main outcome was. == Advances and Special Progress == Explain the key scientific advances compared with earlier molecular photocatalytic CO2 reduction systems. Focus on scientifically meaningful progress such as: - higher activity, - improved CO selectivity, - improved compatibility with water or mixed solvents, - unusual catalyst design, - mechanistic insight, - improved durability, - use of earth-abundant components, - unusual electron-transfer design, - better coupling between catalyst and photosensitizer. Only mention advances that are supported by the article itself. == Additional Remarks == Provide important contextual remarks relevant to the chemistry and significance of the work. Examples may include: - sustainability relevance of CO2-to-CO photoreduction, - strengths and limitations of sacrificial photochemical systems, - dependence on noble-metal photosensitizers, - solvent limitations, - water tolerance, - competition with H2 evolution, - catalyst decomposition, - low long-term durability, - mechanistic elegance versus practical limitations. Keep this section balanced, factual, and chemically relevant. == Content of the Published Article in Detail == Write a clear, teaching-oriented explanation of the scientific content of the article. Include, where supported by the article: - the molecular components of the system, - how the photocatalytic experiment is set up, - what happens after light absorption by the photosensitizer, - whether reductive or oxidative quenching is proposed, - how the sacrificial electron donor participates, - how electrons are transferred to the catalyst, - what reduced catalyst states are proposed or observed, - how CO2 activation and reduction are described, - how CO is formed and released, - whether proton transfer is involved, - what side products are observed or suppressed, - what control experiments or spectroscopic/electrochemical studies support the mechanism. Mechanistic explanation rules: - Explain the mechanism in words. - Be chemically accurate. - Distinguish proposed intermediates from directly observed intermediates. - Use cautious wording where appropriate, such as "the article proposes" or "the data support". - Do not overstate mechanistic certainty. Possible supporting evidence may include: - Stern-Volmer quenching, - emission quenching, - transient absorption, - UV/Vis spectroscopy, - cyclic voltammetry, - spectroelectrochemistry, - control experiments omitting one component, - atmosphere controls, - product analysis, - catalyst comparison studies. == Catalyst == Describe the catalyst in a compact but chemically informative way. Include only details explicitly supported by the article, such as: - exact catalyst identity, - catalyst class, - metal center, - oxidation state if stated, - ligand family or coordination environment, - whether it is mononuclear, dinuclear, supramolecular, macrocyclic, polypyridyl, porphyrinic, or another named class, - whether it is molecular, immobilized, or heterogeneous, - catalytic role in CO2 reduction, - special redox or structural properties relevant to function, - selectivity-related features, - stability or decomposition issues relevant to performance. Do not invent structural details beyond what the article actually states or names. == Photosensitizer == Describe the photosensitizer in the same style. Include only details explicitly supported by the article, such as: - exact identity, - photosensitizer class, - light-harvesting role, - excited-state function, - whether it undergoes reductive or oxidative quenching, - relevant redox or photophysical properties if explicitly discussed, - why it is suitable in this system, - any stability or photobleaching issues if reported. If multiple photosensitizers are compared, identify the main one clearly and mention others only when relevant data are reported. == Investigation == Provide the core photocatalytic experiments as ONE fenced code block that starts with ```csv and ends with ```. The block must be plain CSV — no markdown table, no JSON, no text before or after it inside the block. The header row MUST be EXACTLY these columns, in this order: catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Extraction rules for the CSV: - One row per distinct experimental condition explicitly reported. Take the main photocatalytic performance table first, and add control / condition-variation rows when they are explicitly reported. Include EVERY distinct experiment — do not summarise or collapse rows. - Report numbers as bare values (no unit text) in exactly these units, converting only when the article gives a clear basis: cat conc = µM; PS conc = mM; e-D conc = M; H-D conc = M; Temperature = °C; λexc = nm; irr time = h; Turnover_frequency__* = h^-1; Quantum_yield__* = %. - catalyst, PS (photosensitizer), e-D (sacrificial electron donor), H-D (hydrogen/proton donor): use the identity (name or abbreviation) exactly as given in the article. Keep names consistent across rows. Never swap catalyst, photosensitizer, electron donor, hydrogen donor, solvent, or additive. - Turnover_number__X, Turnover_frequency__X, Quantum_yield__X are per product X (CO, CH4, H2, HCOOH). Put each product's value in its own column; never substitute CO yield, selectivity, total TON, or a value read from a graph. - For a solvent mixture, give solvent A/B/C and the ratio in solvent-ratio (for example 4:1). Keep additives out of the solvent fields. - Keep a wavelength range as a range (for example 420-650); a monochromatic source is a single nm value. - Leave a cell EMPTY only when the article does not state the value. Never invent, guess, reconstruct, or infer a value from general knowledge, figures, or discussion — every value must be explicitly supported by the article. - Do NOT use a value that appears only in the supporting information unless the main text also states it. - Never put a comma inside a cell (commas separate columns); use a space or a slash instead. - Do not add, remove, rename, or reorder columns. Before output, silently verify: section headings match exactly; no bibliographic metadata; units are as specified above; catalyst and photosensitizer are not swapped; no unsupported value was added; one row per distinct experiment. Return only the final MediaWiki entry with the CSV code block in the Investigation section.' and documents [file-RMFu2Xw8oLTNePJDc9RGLi] 21:05:19 400436 AIClient - Response from AI: == Abstract Summary == This article describes a visible-light-driven homogeneous molecular system for reducing CO2 to CO using iron(II) bis(pyrazolyl)phenanthroline complexes as catalysts. The catalytic mixtures used an iron complex, [Ru(bpy)3]2+ as photosensitizer, and BIH as sacrificial electron donor in CO2-saturated MeCN/H2O. All four iron complexes were active for photocatalytic CO formation. The best overall catalyst under the standard screening conditions was Fe2, which gave a reported TONCO of 1318 with 84% CO selectivity. Under lower catalyst loading, Fe2 reached a reported TONCO up to 23,138 and CO selectivity up to 91%. The article also reports that water was important for efficient catalysis, that the catalysis remained homogeneous in mercury poisoning tests, and that loss of activity mainly arose from deterioration of the photosensitizer rather than rapid destruction of the iron catalyst. == Advances and Special Progress == The article presents several advances that are explicitly supported by its data: * '''New iron catalyst family for CO2 photoreduction''': the work introduces iron(II) complexes supported by bis(pyrazolyl)phenanthroline ligands, a ligand platform described in the article as largely unexplored for this reaction. * '''Use of an earth-abundant catalytic metal''': the catalytic metal is iron, rather than a precious-metal catalyst. * '''High activity in a homogeneous photocatalytic system''': Fe2 achieved a reported TONCO of 1318 under the standard catalyst screening conditions and up to 23,138 at lower catalyst loading. * '''High CO selectivity''': the catalysts favored CO over H2, with Fe4 reaching 91% CO selectivity in the standard comparison and Fe2 reaching up to 94% CO selectivity at reduced catalyst loading. * '''Compatibility with mixed aqueous solvent''': the system operated in MeCN/H2O mixtures, and the article identifies 7.5-10% water as especially beneficial. * '''Mechanistic insight from combined methods''': UV/Vis spectroscopy, emission quenching, cyclic voltammetry, DFT, TD-DFT, control experiments, and mercury poisoning experiments were used to support a molecular photocatalytic mechanism. * '''Evidence for catalyst robustness''': the article concludes that deactivation mainly comes from photosensitizer degradation, while the iron catalyst remains largely intact under the tested conditions. == Additional Remarks == Photocatalytic reduction of CO2 to CO is chemically important because CO is a useful carbon-based product and a feedstock for synthesis. This work studies that transformation in a sacrificial photochemical system, which is valuable for mechanistic understanding and catalyst design but still relies on a separate sacrificial donor and a ruthenium photosensitizer. The system is selective but not perfectly exclusive for CO formation, because H2 is also produced. The balance between CO2 reduction and H2 evolution depends strongly on catalyst structure, catalyst loading, and especially water content. Water plays a chemically important but nontrivial role in this system. The article shows that some water is necessary for effective catalysis, but too much water lowers activity. The article attributes the decline at high water content in part to the poor solubility of BIH in more aqueous media. A practical limitation is that the photosensitizer degrades under prolonged irradiation. The article identifies this as a main cause of activity loss, so the durability of the overall photocatalytic system is limited by the photosensitizer rather than solely by the iron catalyst. == Content of the Published Article in Detail == The article studies a molecular photocatalytic CO2 reduction system composed of four related iron(II) complexes, labeled Fe1-Fe4, together with [Ru(bpy)3]2+ as the photosensitizer and BIH as the sacrificial electron donor. The reactions were carried out in CO2-saturated MeCN/H2O under visible light irradiation at 462 nm. Under the standard photocatalytic test conditions, the reaction mixture contained 50 μM iron catalyst, 0.3 mM [Ru(bpy)3]2+, and 0.11 M BIH in 4 mL of CO2-saturated MeCN/H2O. Gas products in the headspace were analyzed by gas chromatography. CO and H2 were detected, while no significant amounts of formate or CH4 were detected. === Molecular components and catalyst series === The iron catalysts are iron(II) complexes bearing tetradentate bis(pyrazolyl)phenanthroline ligands and two water ligands. The ligand substituents were varied across the series to examine electronic and steric effects: * Fe1: unsubstituted pyrazolyl groups * Fe2: 3,5-dimethyl-substituted pyrazolyl groups * Fe3: diphenyl-substituted pyrazolyl groups * Fe4: CF3-substituted pyrazolyl groups The article reports that all complexes have high-spin quintet ground states and distorted octahedral geometries. DFT calculations describe the tetradentate ligand bound to iron with two water ligands occupying trans axial positions. === Spectroscopic and electronic structure observations === UV/Vis measurements showed intense absorption bands in the ultraviolet region. The article assigns these mainly to ligand-centered π-π* transitions. Much weaker red-shifted bands around 450-480 nm were assigned to forbidden transitions. DFT and TD-DFT calculations support this interpretation. The article states that the relevant frontier orbitals indicate predominantly ligand-based acceptor character for reduction, and the lower-energy optical transitions were assigned to SOMO→SUMO excitations. === Electrochemical behavior and implications for catalysis === Cyclic voltammetry showed two reduction waves for each iron complex in acetonitrile. The article discusses whether these might be metal-centered or ligand-centered, and then states that DFT supports predominantly ligand-centered reductions. The proposed reduced forms are described as ligand-reduced species rather than formal low-valent iron products. The electrochemical data are important mechanistically because they show that single-electron reduction of the iron complexes occurs within the potential window accessible to the reduced ruthenium photosensitizer. Under CO2, the voltammetric response changes relative to argon, which the article interprets as evidence that the reduced iron species react with CO2 to form intermediates not reoxidized during the scan. === Quenching and early photoredox steps === The article used fluorescence quenching experiments to study how the excited photosensitizer interacts with BIH and the iron complexes. Emission quenching data showed that both BIH and the iron complexes can quench the emission of [Ru(bpy)3]2+, but BIH is much more efficient. The Stern-Volmer and bimolecular quenching constants reported for BIH are about one order of magnitude larger than those for Fe1-Fe4. On this basis, the article identifies BIH as the dominant quencher of the excited ruthenium photosensitizer. The article therefore supports a '''reductive quenching''' pathway as the main initial step: # [Ru(bpy)3]2+ absorbs visible light and reaches its excited state. # BIH reductively quenches the excited photosensitizer. # The reduced photosensitizer can then transfer an electron to the iron catalyst. The article notes that oxidative quenching by the iron complexes is energetically feasible from orbital-energy alignment, but the quenching data indicate that BIH is the dominant quencher under the reaction conditions. === Catalyst reduction and CO2 activation === The article proposes that electron transfer from the reduced photosensitizer generates reduced iron catalyst states. Based on electrochemistry and DFT, these are described as ligand-centered reduced species. The data support that single-electron reduction is sufficient to activate the catalyst toward reaction with CO2. The article discusses formation of iron-CO2 adducts and proton-coupled reduction steps. It explicitly states that proton-coupled electron transfer is important and that water helps stabilize key intermediates. In particular, the article proposes that water helps in two ways: * as a proton source * by stabilizing metal-CO2 intermediates through hydrogen bonding The article specifically mentions stabilization of an Fe-CO2 adduct and describes Fe-COOH as a reactive intermediate that ultimately evolves to CO. These intermediates were not directly observed in the article; they are part of the mechanistic interpretation supported by the electrochemical and catalytic data. === Product formation and proton involvement === CO is the major carbon-containing product. H2 is the main competing side product. No significant CH4 or formate formation was detected. The article shows that proton transfer is essential. In strictly anhydrous acetonitrile, CO formation was almost completely suppressed. Adding 7.5-10% water strongly increased both activity and selectivity for CO. The article interprets this as evidence that water is required for efficient proton-coupled electron transfer and stabilization of reduced CO2-derived intermediates. At higher water contents, activity decreased. The article attributes this in part to the poor solubility of BIH in more aqueous media, which reduces effective quenching of the excited photosensitizer. === Comparative catalytic performance === All four iron complexes were active, but their performances differed. * Fe2 gave the highest overall activity in the standard catalyst comparison, with TONCO = 1318 and CO selectivity of 84%. * Fe4 gave a similarly high CO output, with TONCO = 1265, and showed the highest standard-condition CO selectivity at 91%. * Fe1 and Fe3 were less active. The article links these differences to ligand substituent effects on electronic structure, redox behavior, and geometry. === Effects of reaction conditions === The article systematically varied several photocatalytic parameters using Fe2. '''Irradiation time''' CO and H2 formation increased over time, especially early in the experiment. The increase slowed at long times, approaching a plateau. '''Catalyst loading''' Lowering Fe2 concentration strongly increased TONCO. At 3.12 μM Fe2, the article reports TONCO = 23,138 after 24 h with 91% CO selectivity. Under short-time low-loading conditions, Fe2 gave TONCO = 9754 after 4 h and a CO quantum yield reported in the article abstract as 8.24%; in the main text, a value of 7.6% is reported for 4 h at 3.12 μM. Because these two values are not identical, the main text and figure-supported value is the safer explicit value for the detailed teaching summary, while the discrepancy should be noted as internal inconsistency in reporting. '''BIH concentration''' No catalytic activity was observed without BIH. Increasing BIH concentration increased performance up to 110 mM, beyond which further improvement was not notable. '''Water content''' The optimum tested range was 7.5-10% water. Without water, catalysis was minimal. At 30-50% water, activity decreased. === Control experiments and homogeneity === Control experiments omitting light, catalyst, photosensitizer, BIH, or CO2 led to no significant photocatalytic formation of CO or H2. Replacing the molecular iron catalyst with Fe(ClO4)2 gave only minor amounts of CO and H2, showing that free iron ions alone do not account for the observed activity. Mercury poisoning experiments did not suppress catalysis, and the article uses this result to support a homogeneous rather than nanoparticle-mediated process. === Deactivation behavior === The article attributes the main catalytic deactivation to deterioration of the ruthenium photosensitizer under irradiation. Additional photosensitizer added after 24 h restored further CO production. This is presented as evidence that the iron catalyst remains largely intact and robust, even though some decomposition under reaction conditions is not excluded. == Catalyst == The catalysts are a series of '''molecular homogeneous iron(II) complexes''' bearing '''bis(pyrazolyl)phenanthroline ligands'''. The four catalysts are Fe1, Fe2, Fe3, and Fe4. The article formulates them as iron(II) complexes of the type [Fe(bpzRphen)(H2O)2]X2, where the pyrazolyl substituents vary across the series. The complexes are described as '''mononuclear''', '''high-spin''', and '''distorted octahedral''', with a tetradentate bis(pyrazolyl)phenanthroline ligand and two coordinated water molecules. Their catalytic role is CO2 reduction to CO under photochemical conditions. Electrochemical and DFT results support that their reductions are mainly '''ligand-centered'''. The article also reports that Fe4 shows structural distortion associated with weak hydrogen-bonding interactions involving the CF3 substituents and coordinated water, and suggests that this may contribute to its high CO selectivity. Among the series, Fe2 gave the highest overall activity, while Fe4 gave the highest CO selectivity in the standard comparison. The article concludes that the catalysts are robust homogeneous catalysts and that activity loss is caused mainly by photosensitizer degradation rather than rapid loss of the iron complex. == Photosensitizer == The photosensitizer is '''[Ru(bpy)3]2+'''. It serves as the visible-light absorber and initiates the photoredox sequence. The article discusses the excited-state emission of the ruthenium complex and uses emission-quenching experiments to probe its interactions with BIH and the iron catalysts. The dominant quenching pathway supported by the data is '''reductive quenching by BIH'''. The article reports that BIH quenches the excited photosensitizer much more efficiently than the iron complexes. The reduced photosensitizer is then proposed to transfer electrons to the iron catalyst. The article also reports that the photosensitizer undergoes deterioration under prolonged irradiation. UV/Vis hypochromism and restoration of catalytic activity after adding fresh [Ru(bpy)3]2+ support the conclusion that photosensitizer degradation is a major cause of overall system deactivation. == Investigation == ```csv catalyst , cat conc , PS , PS conc , e-D , e-D conc , solvent A , solvent B , solvent C , solvent-ratio , additives , additives conc , feedstock gas , intensity , pH , Temperature , λexc , irr time , Turnover_number__CO , Turnover_frequency__CO , Quantum_yield__CO , Turnover_number__CH4 , Turnover_number__H2 , Turnover_frequency__H2 , Turnover_number__HCOOH , Turnover_frequency__HCOOH , Quantum_yield__HCOOH , H-D , H-D conc Fe1 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 987 , 41.1 , , , 187 , 7.8 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 1318 , 54.9 , , , 243 , 10.1 , , , , H2O , not reported Fe3 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 847 , 35.3 , , , 205 , 8.5 , , , , H2O , not reported Fe4 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 1265 , 52.7 , , , 133 , 5.5 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 4 , 311 , 77.7 , , , 51 , 12.8 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 48 , 1578 , 32.9 , , , 296 , 6.2 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 96 , 1593 , 16.6 , , , 300 , 3.1 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , , , not reported , , , CO2 , , , 35 , 462 , 24 , 2 , not reported , , , 22 , not reported , , , , , Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 1352 , 56.3 , , , 285 , 11.9 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 661 , 27.5 , , , 191 , 8.0 , , , , H2O , not reported Fe2 , 50 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 621 , 25.8 , , , 77 , 3.2 , , , , H2O , not reported Fe2 , 25 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 2086 , 86.9 , , , 123 , 5.1 , , , , H2O , not reported Fe2 , 12.5 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 4259 , 177.4 , , , 276 , 11.5 , , , , H2O , not reported Fe2 , 6.25 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 10168 , 423.7 , , , 862 , 35.9 , , , , H2O , not reported Fe2 , 3.12 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 24 , 23138 , 964.1 , , , 2177 , 90.7 , , , , H2O , not reported Fe2 , 3.12 , [Ru(bpy)3]2+ , 0.3 , BIH , 0.11 , MeCN , H2O , , not reported , , , CO2 , , , 35 , 462 , 4 , 9754 , 2438 , 7.6 , , not reported , not reported , , , , H2O , not reported ```