Phenoxazine-Sensitized CO2-to-CO Reduction with an Iron Porphyrin Catalyst: A Redox Properties-Catalytic Performance Study: Difference between revisions
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===Abstract=== | |||
====Summary==== | |||
A photochemical reduction of CO<sub>2</sub> to CO was shown using the iron porphyrin complex {{#moleculelink:|link=FAKQJSUSUXMEFI-NGWNFTKISA-M|image=false|width=300|height=200}} as catalyst, screening the effect of different phenoxazine-based photosensitizers on the CO production. Turnover numbers (TONs) of 115 for CO were reached in acetonitrile in combination with the photosensitizer {{#moleculelink:|link=HDOFYEULLIFSQY-UHFFFAOYSA-N|image=false|width=300|height=200}}. The experiments were conducted under visible-light irradiation (λ > 400 nm) using BIH as sacrificial electron donor (see section SEDs below). | |||
====Advances and special progress==== | |||
In this study, the authors showed a strong relation between the oxidation potential of the photosensitizer and the CO production whereas no correlation between the CO production and the excited state potential of the photosensitizer was discovered. | |||
====Additional remarks==== | |||
===Content of the published article in detail === | |||
The article contains results for the reduction of CO<sub>2</sub> to CO under visible-light catalysis using an iron complex and different phenoxazine-based photosensitizers . The catalytic system performs best (referring to the TON of CO production) in acetonitrile. | |||
====Catalyst==== | ====Catalyst==== | ||
<chemform smiles="C12C(C3C=CC([N+](C)(C)C)=CC=3)=C3N4~[Fe+3]([Cl-])56~N7C(=C(C8C=CC([N+](C)(C)C)=CC=8)C8N~5C(C(C5C=CC([N+](C)(C)C)=CC=5)=C(N=1~6)C=C2)=CC=8)C=CC=7C(C1C=CC([N+](C)(C)C)=CC=1)=C4C=C3.[P-](F)(F)(F)(F)(F)F.[P-](F)(F)(F)(F)(F)F.[P-](F)(F)(F)(F)(F)F.[P-](F)(F)(F)(F)(F)F" inchi="1S/C56H60N8.ClH.4F6P.Fe/c1-61(2,3)41-21-13-37(14-22-41)53-45-29-31-47(57-45)54(38-15-23-42(24-16-38)62(4,5)6)49-33-35-51(59-49)56(40-19-27-44(28-20-40)64(10,11)12)52-36-34-50(60-52)55(48-32-30-46(53)58-48)39-17-25-43(26-18-39)63(7,8)9;;4*1-7(2,3,4,5)6;/h13-36H,1-12H3;1H;;;;;/q+2;;4*-1;+5/p-1/b53-45-,53-46-,54-47-,54-49-,55-48-,55-50-,56-51-,56-52-;;;;;;" inchikey="FAKQJSUSUXMEFI-NGWNFTKISA-M" height="200px" width="300px" float="none"> | <chemform smiles="C12C(C3C=CC([N+](C)(C)C)=CC=3)=C3N4~[Fe+3]([Cl-])56~N7C(=C(C8C=CC([N+](C)(C)C)=CC=8)C8N~5C(C(C5C=CC([N+](C)(C)C)=CC=5)=C(N=1~6)C=C2)=CC=8)C=CC=7C(C1C=CC([N+](C)(C)C)=CC=1)=C4C=C3.[P-](F)(F)(F)(F)(F)F.[P-](F)(F)(F)(F)(F)F.[P-](F)(F)(F)(F)(F)F.[P-](F)(F)(F)(F)(F)F" inchi="1S/C56H60N8.ClH.4F6P.Fe/c1-61(2,3)41-21-13-37(14-22-41)53-45-29-31-47(57-45)54(38-15-23-42(24-16-38)62(4,5)6)49-33-35-51(59-49)56(40-19-27-44(28-20-40)64(10,11)12)52-36-34-50(60-52)55(48-32-30-46(53)58-48)39-17-25-43(26-18-39)63(7,8)9;;4*1-7(2,3,4,5)6;/h13-36H,1-12H3;1H;;;;;/q+2;;4*-1;+5/p-1/b53-45-,53-46-,54-47-,54-49-,55-48-,55-50-,56-51-,56-52-;;;;;;" inchikey="FAKQJSUSUXMEFI-NGWNFTKISA-M" height="200px" width="300px" float="none"> | ||
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====Investigation==== | ====Investigation==== | ||
{{#experimentlist:|form=Photocatalytic_CO2_conversion_experiments|name=Table 1}} | {{#experimentlist:|form=Photocatalytic_CO2_conversion_experiments|name=Table 1}} | ||
====Sacrificial Electron Donor ==== | |||
==== | In this study, the experiments were done with the sacrificial electron donor BIH ({{#moleculelink:|link=VDFIVJSRRJXMAU-UHFFFAOYSA-N|image=false|width=300|height=200}}). | ||
==== Additives==== | |||
In this study, {{#moleculelink:|link=RHQDFWAXVIIEBN-UHFFFAOYSA-N|image=false|width=300|height=200}} was used as an additive. | |||
Revision as of 15:34, 22 January 2024
Abstract
Summary
A photochemical reduction of CO2 to CO was shown using the iron porphyrin complex [Fe(pTMAPP)Cl][PF6]4 as catalyst, screening the effect of different phenoxazine-based photosensitizers on the CO production. Turnover numbers (TONs) of 115 for CO were reached in acetonitrile in combination with the photosensitizer 100762. The experiments were conducted under visible-light irradiation (λ > 400 nm) using BIH as sacrificial electron donor (see section SEDs below).
Advances and special progress
In this study, the authors showed a strong relation between the oxidation potential of the photosensitizer and the CO production whereas no correlation between the CO production and the excited state potential of the photosensitizer was discovered.
Additional remarks
Content of the published article in detail
The article contains results for the reduction of CO2 to CO under visible-light catalysis using an iron complex and different phenoxazine-based photosensitizers . The catalytic system performs best (referring to the TON of CO production) in acetonitrile.
Catalyst
Photosensitizer
3,7-Di((1,1'-biphenyl)-4-yl)-10-(naphthalen-1-yl)-10H-phenoxazine
100761
100762
100763
4-[7-[4-(diphenylamino)phenyl]-10-naphthalen-2-yl-phenoxazin-3-yl]-N,N-diphenyl-aniline
10-naphthalen-2-yl-3,7-di(pyren-1-yl)phenoxazine
Investigation
| cat | cat conc [µM] | PS | PS conc [mM] | e-D | e-D conc [M] | solvent A | additives | . | λexc [nm] | . | TON CO | TON H2 | . | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | 0.002 | 0.2 | 0.005 | TFE | > 400 | 103 | 25 | |||||||
| 2. | 0.002 | 0.2 | 0.005 | TFE | > 400 | 88 | 12 | |||||||
| 3. | 0.002 | 0.2 | 0.005 | TFE | > 400 | 115 | ||||||||
| 4. | 0.002 | 0.2 | 0.005 | TFE | > 400 | 112 | 12 | |||||||
| 5. | 0.002 | 0.2 | 0.005 | TFE | > 400 | 32 | 57 | |||||||
| 6. | 0.002 | 0.2 | 0.005 | TFE | > 400 | 89 |
Sacrificial Electron Donor
In this study, the experiments were done with the sacrificial electron donor BIH (BIH).
Additives
In this study, TFE was used as an additive.
Investigations
- Table 1 (Molecular process, Photocatalytic CO2 conversion experiments)
