Water-Assisted Highly Efficient Photocatalytic Reduction of CO2 to CO with Noble Metal-Free Bis(terpyridine)iron(II) Complexes and an Organic Photosensitizer: Difference between revisions
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A photochemical reduction of CO<sub>2</sub> to CO was shown using the iron complexes {{#moleculelink: |link=VCSOHGDMTDAXCJ-UHFFFAOYSA-N|image=false|width=300|height=200}}, {{#moleculelink: |link=GNLSTNFUDXOKCD-UHFFFAOYSA-N|image=false|width=300|height=200}} and {{#moleculelink: |link=DJDQCCRAAYOAPK-UHFFFAOYSA-N|image=false|width=300|height=200}} as catalysts in combination with the organic photosensitizer {{#moleculelink:|link=PRWATGACIORDEL-UHFFFAOYSA-N|image=false|width=300|height=200}}. Turnover numbers (TONs) of 6320 and a selectivity of 99.4% for CO were reached in DMF/H<sub>2</sub>O with catalyst {{#moleculelink: |link=DJDQCCRAAYOAPK-UHFFFAOYSA-N|image=false|width=300|height=200}}. The experiments were conducted under visible-light irradiation (λ = 440 nm) using TEA as sacrificial electron donor (see section SEDs below). | A photochemical reduction of CO<sub>2</sub> to CO was shown using the iron complexes {{#moleculelink: |link=VCSOHGDMTDAXCJ-UHFFFAOYSA-N|image=false|width=300|height=200}}, {{#moleculelink: |link=GNLSTNFUDXOKCD-UHFFFAOYSA-N|image=false|width=300|height=200}} and {{#moleculelink: |link=DJDQCCRAAYOAPK-UHFFFAOYSA-N|image=false|width=300|height=200}} as catalysts in combination with the organic photosensitizer {{#moleculelink:|link=PRWATGACIORDEL-UHFFFAOYSA-N|image=false|width=300|height=200}}. Turnover numbers (TONs) of 6320 and a selectivity of 99.4% for CO were reached in DMF/H<sub>2</sub>O with catalyst {{#moleculelink: |link=DJDQCCRAAYOAPK-UHFFFAOYSA-N|image=false|width=300|height=200}}. The experiments were conducted under visible-light irradiation (λ = 440 nm) using TEA as sacrificial electron donor (see section SEDs below). | ||
====Advances and special progress==== | ====Advances and special progress==== | ||
One of the highest TONs for CO<sub>2</sub> reduction with an organic thermally activated delayed fluorescence (TADF) compound as a photosensitizer was reported herein. | |||
====Additional remarks==== | ====Additional remarks==== | ||
The addition of water was found to strongly promote the catalytic reaction. | |||
===Content of the published article in detail=== | ===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 the iron complex | The article contains results for the reduction of CO<sub>2</sub> to CO under visible-light catalysis using the iron complex {{#moleculelink:|link=DJDQCCRAAYOAPK-UHFFFAOYSA-N|image=false|width=300|height=200}} as a catalyst. The catalytic system performs best (referring to the TON of CO production) in DMF/H<sub>2</sub>O. | ||
====Catalyst==== | ====Catalyst==== | ||
<chemform smiles="C1C=CN2~[Fe]34(~N5C=CC=CC=5C5N~3=C(C=C(C3C=CC([*])=CC=3)C=5)C3C=CC=CN=3~4)3~N4=CC=CC=C4C4C=C(C5C=CC([*])=CC=5)C=C(N=4~3)C=2C=1" inchi="" inchikey="" height="200px" width="300px" float="none" r1="H,Cl,NMe2"> | <chemform smiles="C1C=CN2~[Fe]34(~N5C=CC=CC=5C5N~3=C(C=C(C3C=CC([*])=CC=3)C=5)C3C=CC=CN=3~4)3~N4=CC=CC=C4C4C=C(C5C=CC([*])=CC=5)C=C(N=4~3)C=2C=1" inchi="" inchikey="" height="200px" width="300px" float="none" r1="H,Cl,NMe2"> | ||
Revision as of 08:54, 15 May 2024
Abstract
Summary
A photochemical reduction of CO2 to CO was shown using the iron complexes 100947, 100948 and 100949 as catalysts in combination with the organic photosensitizer 4CzIPN. Turnover numbers (TONs) of 6320 and a selectivity of 99.4% for CO were reached in DMF/H2O with catalyst 100949. The experiments were conducted under visible-light irradiation (λ = 440 nm) using TEA as sacrificial electron donor (see section SEDs below).
Advances and special progress
One of the highest TONs for CO2 reduction with an organic thermally activated delayed fluorescence (TADF) compound as a photosensitizer was reported herein.
Additional remarks
The addition of water was found to strongly promote the catalytic reaction.
Content of the published article in detail
The article contains results for the reduction of CO2 to CO under visible-light catalysis using the iron complex 100949 as a catalyst. The catalytic system performs best (referring to the TON of CO production) in DMF/H2O.
Catalyst
Photosensitizer
Investigation
| cat | cat conc [µM] | PS | PS conc [mM] | e-D | e-D conc [M] | solvent A | . | . | . | λexc [nm] | . | TON CO | . | . | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | 0.01 | 0.05 | 0.28 | 420-650 | 6320 | ||||||||||
| 2. | 0.01 | 0.05 | 0.28 | 420-650 | 2780 | ||||||||||
| 3. | 0.01 | 0.05 | 0.28 | 420-650 | 4500 | ||||||||||
| 4. | 0.01 | 0.05 | 0.28 | 420-650 | 19 | ||||||||||
| 5. | 0.01 | 0.05 | 0.28 | 420-650 | 992 |
Sacrificial electron donor
In this study, the experiments were done with the sacrificial electron donor TEA (TEA).
Additives
In this study, no additives were tested.
Investigations
- photocatalytic CO2 conversion (Molecular process, Photocatalytic CO2 conversion experiments)
