Exchange Coupling Determines Metal-Dependent Efficiency for Iron- and Cobalt-Catalyzed Photochemical CO2 Reduction: Difference between revisions

Latest revision as of 15:19, 22 November 2024

A photochemical reduction of CO2 to CO was shown using an Fe2+ and Co2+ complex as catalysts in combination with different photosensitizers. The authors examined the efficiency for photocatalytic CO2RR pending on metal−ligand exchange coupling as an example of charge delocalization. The iron complex 100968 and cobalt complexes100969, both bearing the redox-active ligand tpyPY2Me were tested in comparison. It was found that the two-electron reduction of the Co(tpyPY2Me)]2+ catalyst 100969 occurs at potentials 770 mV more negative than the Fe(tpyPY2Me)]2+ analogue100968 due to maximizing the exchange coupling in the latter compound.

Advances and special progress[edit | edit source]

Additional remarks[edit | edit source]

Content of the published article in detail[edit | edit source]

Catalysts tested in this study[edit | edit source]

100968 100969

Photosensitizer[edit | edit source]

Ru(bpy)3 3,6-Diamino-10-methylacridinium 100971 Ir(ppy)3

Investigation[edit | edit source]

General details for the experimental setup: Conducted inside a 25 mL borosilicate culture tube with a stir bar, a rubber septum, and an aluminum crimped top. The reaction vessel contained 5 mL of CH3CN, 2 μM of the catalyst, 200 μM of the photosensitizer, 100 mM BIH (112 mg), and 1 M phenol (470 mg). The reaction tubes were sparged with CO2 for 10 min, followed by injection of a gaseous internal standard (0.1 mL of C2H6). The reactions were placed on a stirplate 13 cm from two Kessil blue LED lamps (440 nm) for 15 or 30 min at a time and maintained at ambient temperature using a fan. Analysis of the headspace by Gas Chromatography (GC).

	cat	cat conc [µM]	PS	PS conc [mM]	e-D	e-D conc [M]	solvent A	additives	TON CO	TON H2
1.	Molecule:100968	2	Ru(bpy)3	0.2	BIH	0.1	MeCN		15520	86
2.	Molecule:100968	0.2	Ru(bpy)3	0.2	BIH	0.1	MeCN		30349	1013
3.			Ru(bpy)3	0.2	BIH	0.1	MeCN		43	52
4.	Molecule:100968	2			BIH	0.1	MeCN		112	0
5.	Molecule:100968	2	Ru(bpy)3	0.2			MeCN		150	0
6.	Molecule:100968	2	Ru(bpy)3	0.2	BIH	0.1	MeCN		6	0
7.	Molecule:100968	2	Ru(bpy)3	0.2	BIH	0.1	MeCN	Ar	0	222
8.	Molecule:100968	2	Molecule:100971	0.2	BIH	0.1	MeCN		12749	163
9.	Molecule:100968	0.2	Molecule:100971	0.2	BIH	0.1	MeCN		28712	6527
10.	Molecule:100968	2	Ir(ppy)3	0.2	BIH	0.1	MeCN		18502	141
11.	Molecule:100968	2	Molecule:100970	0.2	BIH	0.1	MeCN		6710	0

Investigation-Name: CO2 Reduction under diverse conditions with diverse sensitizers

The values in Table 2 include TOF numbers given in TON/h

"Molecule:" can not be assigned to a declared number type with value 1009792."Molecule:" can not be assigned to a declared number type with value 1009819.

	cat	cat conc [µM]	PS	PS conc [mM]	e-D	e-D conc [M]	solvent A
1.	Molecule:100969	2	Ru(bpy)3	0.2	BIH	0.1	MeCN
2.	Molecule:100969	2	Molecule:100971	0.2	BIH	0.1	MeCN
3.	Molecule:100969	2	Ir(ppy)3	0.2	BIH	0.05	MeCN
4.	Molecule:100969	2	Molecule:100971	0.2	BIH	0.05	MeCN
5.	Molecule:100969	2	Ru(bpy)3	0.2	BIH	0.05	MeCN
6.	Molecule:100969	2	Molecule:100971	0.2	TEA	0.05	MeCN
7.	Molecule:100969	2	Molecule:100971	0.2	TEA	0.05	MeCN
8.	Molecule:100969	2	Molecule:100971	0.2	TEA	0.05	MeCN
9.	Molecule:100969	2	Molecule:100971	0.2	TEA	0.05	MeCN

Investigation-Name: Table 2 Co catalyst testing

"Molecule:" can not be assigned to a declared number type with value 1009792."Molecule:" can not be assigned to a declared number type with value 1009819.

	cat	cat conc [µM]	PS	PS conc [mM]	e-D	e-D conc [M]	solvent A
1.	Molecule:100969	2	Ru(bpy)3	0.2	BIH	0.1	MeCN
2.	Molecule:100969	2	Molecule:100971	0.2	BIH	0.1	MeCN
3.	Molecule:100969	2	Ir(ppy)3	0.2	BIH	0.05	MeCN
4.	Molecule:100969	2	Molecule:100971	0.2	BIH	0.05	MeCN
5.	Molecule:100969	2	Ru(bpy)3	0.2	BIH	0.05	MeCN
6.	Molecule:100969	2	Molecule:100971	0.2	TEA	0.05	MeCN
7.	Molecule:100969	2	Molecule:100971	0.2	TEA	0.05	MeCN
8.	Molecule:100969	2	Molecule:100971	0.2	TEA	0.05	MeCN
9.	Molecule:100969	2	Molecule:100971	0.2	TEA	0.05	MeCN

Investigation-Name: testtest2

Further Information[edit | edit source]

The results for the catalytic activity of the Co2+ compound 100969 in Table 2 were gained from the Supporting Information.

Sacrificial electron donor[edit | edit source]

In this study, the experiments were done with the sacrificial electron donor BIH (100508).

Additives[edit | edit source]

Different sources of protons were used, e.g. PhOH, TFE and 4-CHLOROPHENOL

Investigations

CO2 Reduction under diverse conditions with diverse sensitizers (Molecular process, Photocatalytic CO2 conversion experiments)
Iron-Catalyzed Photochemical CO2 Reduction under diverse conditions (Molecular process, Photocatalytic CO2 conversion experiments)
Iron-Catalyzed Photochemical CO2 Reduction under diverse conditions error (Molecular process, Photocatalytic CO2 conversion experiments)
Table 2 Co catalyst testing (Molecular process, Photocatalytic CO2 conversion experiments)
Table 2 Conversion with Co catalyst (Molecular process, Photocatalytic CO2 conversion experiments)
Table 2 conversion with Co catalyst (Molecular process, Photocatalytic CO2 conversion experiments)
testtest2 (Molecular process, Photocatalytic CO2 conversion experiments)

DOI	10.1021/acscatal.2c02072
Authors	Patricia De La Torre, Jeffrey S. Derrick, Andrew Snider, Peter T. Smith, Matthias Loipersberger, Martin Head-Gordon, Christopher J. Chang,
Submitted	01.07.2022
Published online	01.07.2022
Licenses	https://doi.org/10.15223/policy-029, https://doi.org/10.15223/policy-037, https://doi.org/10.15223/policy-045,
Subjects	-
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Exchange Coupling Determines Metal-Dependent Efficiency for Iron- and Cobalt-Catalyzed Photochemical CO2 Reduction: Difference between revisions

Latest revision as of 15:19, 22 November 2024

Contents

Abstract[edit | edit source]

Summary[edit | edit source]

Advances and special progress[edit | edit source]

Additional remarks[edit | edit source]

Content of the published article in detail[edit | edit source]

Catalysts tested in this study[edit | edit source]

Photosensitizer[edit | edit source]

Investigation[edit | edit source]

Further Information[edit | edit source]

Sacrificial electron donor[edit | edit source]

Additives[edit | edit source]

Investigations

Tags

Topics

@@ Line 7: / Line 7: @@
 [[Category:Publication]]
 ====Summary ====
-A {{Annotation|property=Tag|value=photocatalytic CO2 reduction; voc4cat; voc4cat:0000099|display=photochemical reduction of CO2}} to {{Annotation|property=Tag|value=CO;;|display=CO}} was shown using an Fe2+ and Co2+ complexes as catalysts in combination with Ruxx as photosensitizer.
+A {{Annotation|property=Tag|value=photocatalytic CO2 reduction; voc4cat; voc4cat:0000099|display=photochemical reduction of CO2}} to {{Annotation|property=Tag|value=CO;;|display=CO}} was shown using an Fe2+ and Co2+ complex as catalysts in combination with different photosensitizers. The authors examined the efficiency for photocatalytic CO2RR pending on metal−ligand exchange coupling as an example of charge delocalization. The iron complex {{#moleculelink:|link=YJOFQAAXFUIRKO-UHFFFAOYSA-N|image=false|width=300|height=200}} and cobalt complexes{{#moleculelink:|link=GEWRDVXFGQMHJL-UHFFFAOYSA-N|image=false|width=300|height=200}}, both bearing the redox-active ligand tpyPY2Me  were tested in comparison. It was found that the two-electron reduction of the Co(tpyPY2Me)]2+ catalyst {{#moleculelink:|link=GEWRDVXFGQMHJL-UHFFFAOYSA-N|image=false|width=300|height=200}} occurs at potentials 770 mV more negative than the Fe(tpyPY2Me)]2+ analogue{{#moleculelink:|link=YJOFQAAXFUIRKO-UHFFFAOYSA-N|image=false|width=300|height=200}} due to maximizing the exchange coupling in the latter compound.
+====Advances and special progress====
-metal−ligand exchange coupling as an example of charge delocalization that can determine the efficiency for photocatalytic CO2RR. A comparative evaluation of iron and cobalt complexes supported by the redox-active ligand tpyPY2Me establishes that the two-electron reduction of [Co(tpyPY2Me)]2+ ([Co]2+) occurs at potentials 770 mV more negative than the [Fe(tpyPY2Me)]2+ ([Fe]2+) analogue by maximizing the exchange coupling in the latter compound.
-====Advances and special progress====
 ====Additional remarks====
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@@ Line 111: / Line 202: @@
 === Photosensitizer ===
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+</chemform> <chemform smiles="" inchi="" inchikey="NSABRUJKERBGOU-UHFFFAOYSA-N" height="200px" width="300px" float="none"></chemform>
 === Investigation ===
-{{#experimentlist:|form=Photocatalytic_CO2_conversion_experiments|name=Comparison of Fe and Co complexes|importFile=}}
-===Further Information===
-The Supporting Information gives quantum yields for described experiments in Table 1.
+General details for the experimental setup: Conducted inside a 25 mL borosilicate culture tube with a stir bar, a rubber septum, and an aluminum crimped top. The reaction vessel contained 5 mL of CH3CN, 2 μM of the catalyst, 200 μM of the photosensitizer, 100 mM BIH (112 mg), and 1 M phenol (470 mg). The reaction tubes were sparged with CO2 for 10 min, followed by injection of a gaseous internal standard (0.1 mL of C2H6). The reactions were placed on a stirplate 13 cm from two Kessil blue LED lamps (440 nm) for 15 or 30 min at a time and maintained at ambient temperature using a fan. Analysis of the headspace by Gas Chromatography (GC).{{#experimentlist:|form=Photocatalytic_CO2_conversion_experiments|name=CO2 Reduction under diverse conditions with diverse sensitizers|importFile=Exchange Coupling Determines Metal-Dependent Efficiency for Iron- and Cobalt-Catalyzed Photochemical CO2 Reduction_2.xlsx}}
+The values in Table 2 include TOF numbers given in TON/h
+{{#experimentlist:|form=Photocatalytic_CO2_conversion_experiments|name=Table 2 Co catalyst testing|importFile=Exchange Coupling Determines Metal-Dependent Efficiency for Iron- and Cobalt-Catalyzed Photochemical CO2 Reduction_Table2.xlsx}}
+{{#experimentlist:|form=Photocatalytic_CO2_conversion_experiments|name=testtest2|importFile=Exchange Coupling Determines Metal-Dependent Efficiency for Iron- and Cobalt-Catalyzed Photochemical CO2 Reduction_Table2.xlsx}}
+=== Further Information ===
+The results for the catalytic activity of the Co2+ compound {{#moleculelink:|link=GEWRDVXFGQMHJL-UHFFFAOYSA-N|image=false|width=300|height=200}} in Table 2 were gained from the Supporting Information.
 ====Sacrificial electron donor====
 In this study, the experiments were done with the sacrificial electron donor BIH ([[Molecule:100508|100508]]).
 ====Additives====
+Different sources of protons were used, e.g. {{#moleculelink:|link=ISWSIDIOOBJBQZ-UHFFFAOYSA-N|image=false|width=300|height=200}}, {{#moleculelink:|link=RHQDFWAXVIIEBN-UHFFFAOYSA-N|image=false|width=300|height=200}} and {{#moleculelink:|link=WXNZTHHGJRFXKQ-UHFFFAOYSA-N|image=false|width=300|height=200}}

Exchange Coupling Determines Metal-Dependent Efficiency for Iron- and Cobalt-Catalyzed Photochemical CO2 Reduction: Difference between revisions

Latest revision as of 15:19, 22 November 2024

Abstract[edit | edit source]

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Catalysts tested in this study[edit | edit source]

Photosensitizer[edit | edit source]

Investigation[edit | edit source]

Further Information[edit | edit source]

Sacrificial electron donor[edit | edit source]

Additives[edit | edit source]

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