Title | Water oxidation catalyzed by a charge-neutral mononuclear ruthenium(iii) complex. |
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Authors | Lu, Z.; Gao, Y.; Chen, H.; Liu, Z.; Sun, L. |
Journal | Dalton Trans |
DOI | 10.1039/c6dt04160d |
Abstract |
A new charge-neutral Ru(iii) complex RuL(pic)3 (1) (H3L = 3,6-di-tert-butyl-9H-carbazole-1,8-dicarboxylic acid, pic = 4-picoline) was synthesized and fully characterized. This complex promoted chemical and photochemical water oxidation efficiently with turnover frequencies of 0.28 s(-1) and 5 min(-1), respectively. In particular, for photochemical water oxidation, complex 1 showed excellent stability and good activity. The X-ray crystal structure, electrochemical results, and the detection of the Ru(IV)-OH intermediate by high-resolution mass spectrometry revealed that complex 1 exchanged its 4-picoline ligand with water at the Ru(III) state to form the authentic water oxidation catalyst. The kinetics studies suggested a reaction mechanism involving nucleophilic attack by a water molecule. |
Water oxidation catalyzed by a charge-neutral mononuclear ruthenium(iii) complex.