Creation of Photo-Driven CO2 Multi-Reduction System by Using MetalComplexes

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In this study entitled “Creation of Photo-Driven CO2 Multi-Reduction System by Using Metal Complexes”, we have paid attention to renewable hydride in coenzyme NAD （Nicotinamide Adenine Dinucleotide) and developed photo-driven CO2 multi-reduction system byutilizing coordination compounds having the NAD function. As a result, we have got the following results; （1) successful control over the structures of NAD model complexes has been accomplished by introducing a substituent group into the ligand, and we have also succeeded in control over the photo-driven hydrogenation reaction properties in these complexes, （2) we have successfullysynthesized and isolated a new NAD model complex having a substrate binding site, and this complex can store multiple organic hydrides upon irradiation of visible light, （3) we have succeeded in the synthesis of a novel metal complex with a view to further high efficiency of CO2 reduction and alsogained insights into a unique formation mechanism of the complex