Highly Efficient and Robust Photocatalytic Systems for CO2 Reduction Consisting of a Cu(I) Photosensitizer and Mn(I) Catalysts

Abstract

Summary

A photochemical reduction of CO₂ to CO or formic acid was shown using the manganese complexes Mn(bpy)(CO)3Br, 100845 or Mn(oMesbpy)(CO)2Br as catalyst in combination with the copper-based photosensitizer [Cu(phen)-(dPPh-Bu)2]2[PF6]2. Turnover numbers (TONs) over 1300 for CO were reached in dimethylacetamide/TEOA for complex 100845. The highest selectivity for CO (96%) was obtained for catalyst Mn(oMesbpy)(CO)2Br while catalyst Mn(bpy)(CO)3Br allowed for the reduction of CO₂ to formic acid with a selectivity of 74%. The experiments were conducted under visible-light irradiation (λ = 436 nm) using BIH as sacrificial reductants (see section SEDs below).

Content of the published article in detail

The article contains results for the reduction of CO₂ to CO and formic acid under visible-light catalysis using manganese complexes as catalysts. The catalytic system performs best (referring to the TON of CO production) in xx.

Catalyst

100751 [Show R-Groups] Mn(oMesbpy)(CO)2Br

Photosensitizer

[Cu(phen)-(dPPh-Bu)2]2[PF6]2

Investigation

1. REDIRECT Results for photocatalytic reduction of CO2

Investigation-Name: Table 1Export

Sacrificial electron donor

In this study, the experiments were done with the sacrificial electron donors TEOA (100507) and BIH (100508).

Additives

In this study, no additives were tested.