Effective visible-light driven CO2photoreduction via a promising bifunctional iridium coordination polymer

• DOI: 10.1039/c4sc00940a
• Publication Date: 2014-06-03T13:46:35Z
• Authors: Lina Li; Shuquan Zhang; Liangjin Xu; Jinyun Wang; Lin-Xi Shi; Zhong-Ning Chen; Maochun Hong; Junhua Luo
• Keywords: Visible spectrum

A promising coordination polymer photocatalyst (Y[Ir(ppy)2(dcbpy)]2[OH]) (Ir-CP, ppy = 2-phenylpyridine, dcbpy 2,2′-bipyridine-4,4′-dicarboxylate) based on a highly efficient light-harvesting Ir unit, Ir(ppy)2(Hdcbpy), has been obtained, with good stability and exhibiting visible-light absorption over broad range, arising from the metal-to-ligand charge transfer (3MLCT) ligand-to-ligand (LLCT). The designed Ir-CP heterogeneous acts as both photosensitizer to harvest visible light, an active catalyst for CO2 photoreduction. Due in UV-visible region long-lived excited states of Ir-CP, can efficiently catalyze reduction under irradiation photocatalytic system. For first time, remarkable efficiency (38 μmol HCOO− was produced 6 h) shown. Moreover, shows high photostability during photoreduction, which promotes recyclability photocatalyst.