Development of new photocatalysts for hydride transfer

本文以Ir（III）配合物为光催化剂，以胺为还原剂，研究了将CO2还原为CO的光化学方法。将带有苯并呋喃桥配体的Ru（II）二聚体照射得到相应的二氢化物配合物，但该光化学体系不能将CO2还原为甲醛和甲醇。我们仔细研究了Ru（II）氢化物配合物到各种NAD模型化合物的氢化物转移反应，并阐明了电子和空间效应对产物选择性和反应速率的影响。

We newly developed photochemical CO2 reduction to CO by using an Ir(III) complex as photocatalyst with amine as reductant. Irradiation to a Ru(II) dimer with a benzofurane bridge ligand gave the corresponding dihydrido complex, however, this photochemical system could not reduce CO2 to formaldehyde and methanol.We carefully investigated the hydride transfer reactions from a Ru(II) hydrido complex to various NAD model compounds and clarified both electronic and steric effects on the selectivity of the products and the reaction rates.