Issue 10, 2014

Effective visible-light driven CO2 photoreduction via a promising bifunctional iridium coordination polymer

Abstract

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 a broad range, arising from the metal-to-ligand charge transfer (3MLCT) and ligand-to-ligand charge transfer (LLCT). The designed Ir-CP heterogeneous photocatalyst acts as both a photosensitizer to harvest visible light, and an active catalyst for CO2 photoreduction. Due to the broad absorption in the UV-visible region and long-lived excited states of Ir-CP, the photocatalyst can efficiently catalyze CO2 reduction under visible-light irradiation in a heterogeneous photocatalytic system. For the first time, the remarkable photocatalytic efficiency of Ir-CP under visible-light irradiation (38 μmol HCOO was produced in 6 h) was shown. Moreover, Ir-CP shows high photostability during CO2 photoreduction, which promotes the recyclability of the heterogeneous photocatalyst.

Graphical abstract: Effective visible-light driven CO2 photoreduction via a promising bifunctional iridium coordination polymer

Supplementary files

Article information

Article type
Edge Article
Submitted
31 Mar 2014
Accepted
31 May 2014
First published
03 Jun 2014

Chem. Sci., 2014,5, 3808-3813

Effective visible-light driven CO2 photoreduction via a promising bifunctional iridium coordination polymer

L. Li, S. Zhang, L. Xu, J. Wang, L. Shi, Z. Chen, M. Hong and J. Luo, Chem. Sci., 2014, 5, 3808 DOI: 10.1039/C4SC00940A

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