Merging an organic TADF photosensitizer and a simple terpyridine–Fe(iii) complex for photocatalytic CO2 reduction: Difference between revisions
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In this study, the experiments were done with the sacrificial electron donor TEA ({{#moleculelink:|link=ZMANZCXQSJIPKH-UHFFFAOYSA-N|image=false|width=300|height=200}}). | In this study, the experiments were done with the sacrificial electron donor TEA ({{#moleculelink:|link=ZMANZCXQSJIPKH-UHFFFAOYSA-N|image=false|width=300|height=200}}). | ||
====Additives==== | ====Additives==== | ||
In this study, no additives were tested. Control experiments with other photosensitizers ( | In this study, no additives were tested. Control experiments with other photosensitizers (Ru(bpy)<sub>3</sub>, Fluorescein and Eosin Y) and catalysts (FeCl3) were conducted. | ||
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Revision as of 12:10, 16 May 2024
Abstract
Summary
The photochemical reduction of CO2 to CO was shown using the iron complex Fe(tpy-tol)Cl3 in combination with the organic photosensitizer 4CzIPN. Turnover numbers (TONs) of up to 2250 and a selectivity of 99.3% for CO were reached in DMF/H2O. The experiments were conducted under visible-light irradiation (λ > 420 nm) with TEA (see section SEDs below) as sacrificial electron donor.
Advances and special progress
The presented study contains the first example for the use of an organic thermally activated delayed fluorescence (TADF) compound as a photosensitizer in CO2 reduction.
Additional remarks
Content of the published article in detail
The article contains results of a study for the reduction of CO2 to CO using an iron complex and an organic TADF photosensitizer. The catalytic system performs best (referring to the TON of CO production) in DMF.
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 | 2250 | |||||||||
| 2. | 0.01 | 0.01 | 0.28 | 420-650 | 133 | |||||||||
| 3. | 0.01 | 0.05 | 0.28 | 420-650 | 244 | |||||||||
| 4. | 0.01 | 0.1 | 0.28 | 420-650 | 246 | |||||||||
| 5. | 0.01 | 0.05 | 0.28 | 420-650 | 6 | |||||||||
| 6. | 0.01 | 0.05 | 0.28 | 420-650 | 17 | |||||||||
| 7. | 0.01 | 0.05 | 0.28 | 420-650 | 0 | |||||||||
| 8. | 0.01 | 0.05 | 0.28 | 420-650 | 0 |
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. Control experiments with other photosensitizers (Ru(bpy)3, Fluorescein and Eosin Y) and catalysts (FeCl3) were conducted.
Investigations
- photocatalytic reduction of CO2 to CO (Molecular process, Photocatalytic CO2 conversion experiments)
