Highly Efficient and Selective Photocatalytic CO2 Reduction by Iron and Cobalt Quaterpyridine Complexes

Abstract

Summary

A photochemical reduction of CO₂ to CO was shown using the cobalt complex [Fe(qpy)(H2O)2][ClO4]2 (100786) or the iron complex [Co(qpy)(H2O)2][ClO4]2 (100788) as catalysts in combination with the ruthenium-based photosensitizer Ru(bpy)3Cl2 (100787) or the organic dye sensitizer purpurin (100499). Turnover numbers (TONs) up to xx and selectivity of xx for CO were reached in xx. The experiments were conducted under visible-light irradiation (λ = 460 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 xx under visible-light catalysis using a xx complex as a catalyst. The catalytic system performs best (referring to the TON of CO production) in xx using xx and xx.

Catalysts

[Fe(qpy)(H2O)2][ClO4]2 (100786) [Co(qpy)(H2O)2][ClO4]2 (100788) Co(ClO4)2 (100789)

Photosensitizers

Ru(bpy)3Cl2 (100787) purpurin (100499)

Investigations

REDIRECT Optimizations of conditions for Co(qpy)(H2O)2(ClO4)2 and Ru(bpy)3Cl2Investigation-Name: Co(qpy)(H2O)2(ClO4)2 and Ru(bpy)3Cl2

REDIRECT Optimizations of conditions for Fe(qpy)(H2O)2(ClO4)2 and Ru(bpy)3Cl2Investigation-Name: Fe(qpy)(H2O)2(ClO4)2 and Ru(bpy)3Cl2

REDIRECT Optimizations of conditions for Co(qpy)(H2O)2(ClO4)2 and purpurinInvestigation-Name: Co(qpy)(H2O)2(ClO4)2 and purpurin

REDIRECT Optimizations of conditions for Fe(qpy)(H2O)2(ClO4)2Investigation-Name: Fe(qpy)(H2O)2(ClO4)2

Sacrificial electron donor

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

Additives

In this study, some experiments were conducted xx