Conversion of CO₂ via visible light promoted homogeneous redox catalysis

This review gives an overview on the principles of light-promoted homogeneous redox catalysis in terms of applications in CO₂ conversion. Various chromophores and the advantages of different structures and metal centers as well as optimization strategies are discussed. All aspects of the reduction catalyst site are restricted to CO₂ conversion. An important focus of this review is the question of a replacement of the sacrificial donor which is found in most of the current publications. Furthermore, electronic parameters of supramolecular systems are reviewed with reference to the requisite of chromophores, oxidation and reduction sites.