TY - JOUR
T1 - Highly Efficient and Selective Photocatalytic CO2 Reduction by Iron and Cobalt Quaterpyridine Complexes
AU - Guo, Zhenguo
AU - Cheng, Siwei
AU - Cometto, Claudio
AU - Anxolabéhère-Mallart, Elodie
AU - Ng, Siu Mui
AU - Ko, Chi Chiu
AU - Liu, Guijian
AU - Chen, Lingjing
AU - Robert, Marc
AU - Lau, Tai Chu
N1 - Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/8/3
Y1 - 2016/8/3
N2 - The design of highly efficient and selective photocatalytic systems for CO2 reduction that are based on nonexpensive materials is a great challenge for chemists. The photocatalytic reduction of CO2 by [Co(qpy)(OH2)2]2+ (1) (qpy = 2,2′:6′,2″:6″,2'-quaterpyridine) and [Fe(qpy)(OH2)2]2+ (2) have been investigated. With Ru(bpy)32+ as the photosensitizer and 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole as the sacrificial reductant in CH3CN/triethanolamine solution under visible-light excitation (blue light-emitting diode), a turnover number (TON) for CO as high as 2660 with 98% selectivity can be achieved for the cobalt catalyst. In the case of the iron catalyst, the TON was >3000 with up to 95% selectivity. More significantly, when Ru(bpy)32+ was replaced by the organic dye sensitizer purpurin, TONs of 790 and 1365 were achieved in N,N-dimethylformamide for the cobalt and iron catalysts, respectively.
AB - The design of highly efficient and selective photocatalytic systems for CO2 reduction that are based on nonexpensive materials is a great challenge for chemists. The photocatalytic reduction of CO2 by [Co(qpy)(OH2)2]2+ (1) (qpy = 2,2′:6′,2″:6″,2'-quaterpyridine) and [Fe(qpy)(OH2)2]2+ (2) have been investigated. With Ru(bpy)32+ as the photosensitizer and 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole as the sacrificial reductant in CH3CN/triethanolamine solution under visible-light excitation (blue light-emitting diode), a turnover number (TON) for CO as high as 2660 with 98% selectivity can be achieved for the cobalt catalyst. In the case of the iron catalyst, the TON was >3000 with up to 95% selectivity. More significantly, when Ru(bpy)32+ was replaced by the organic dye sensitizer purpurin, TONs of 790 and 1365 were achieved in N,N-dimethylformamide for the cobalt and iron catalysts, respectively.
UR - https://www.scopus.com/pages/publications/84982731603
U2 - 10.1021/jacs.6b06002
DO - 10.1021/jacs.6b06002
M3 - Article
AN - SCOPUS:84982731603
SN - 0002-7863
VL - 138
SP - 9413
EP - 9416
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 30
ER -