title: A Dinuclear Cobalt Cryptate as a Homogeneous Photocatalyst for Highly Selective and Efficient Visible-Light Driven CO2Reduction to CO in CH3CN/H2O Solution.
abstract: A dinuclear cobalt complex [Co2(OH)L1](ClO4)3(1, L1=N[(CH2)2NHCH2(m-C6H4)CH2NH(CH2)2]3N) displays high selectivity and efficiency for the photocatalytic reduction of CO2to CO in CH3CN/H2O (v/v=4:1) under a 450 nm LED light irradiation, with a light intensity of 100 mW cm-2. The selectivity reaches as high as 98 %, and the turnover numbers (TON) and turnover frequencies (TOF) reach as high as 16896 and 0.47 s-1, respectively, with the calculated quantum yield of 0.04 %. Such high activity can be attributed to the synergistic catalysis effect between two CoIIions within 1, which is strongly supported by the results of control experiments and DFT calculations.
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Ouyang
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China.
authors.forename: Hai-Hua
authors.initials: HH
authors.lastname: Huang
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China.
authors.forename: Jia-Wei
authors.initials: JW
authors.lastname: Wang
authors.affiliation: Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China.
authors.forename: Di-Chang
authors.initials: DC
authors.lastname: Zhong
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China.|Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China.
authors.forename: Tong-Bu
authors.initials: TB
authors.lastname: Lu
keywords: CO2 reduction; DFT calculations; cobalt complex; homogeneous photocatalyst; synergistic catalysis