Water Oxidation Catalyzed by a Dinuclear Cobalt–Polypyridine Complex |
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| Authors: | Dr. Hong‐Yan Wang Dr. Edgar Mijangos Dr. Sascha Ott Dr. Anders Thapper |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062 (P. R. China);2. Department of Chemistry—?ngstr?m Laboratory, Uppsala University, P.O. Box 523, 75120 Uppsala (Sweden) |
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| Abstract: | The dinuclear Co complex [(TPA)Co(μ‐OH)(μ‐O2)Co(TPA)](ClO4)3 ( 1 , TPA=tris(2‐pyridylmethyl)amine) catalyzes the oxidation of water. In the presence of [Ru(bpy)3]2+ and S2O82?, photoinduced oxygen evolution can be observed with a turnover frequency (TOF) of 1.4±0.1 mol(O2) mol( 1 )?1 s?1 and a maximal turnover number (TON) of 58±5 mol(O2) mol( 1 )?1. The complex is shown to act as a molecular and homogeneous catalyst and a mechanism is proposed based on the combination of EPR data and light‐driven O2 evolution kinetics. |
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| Keywords: | dinuclear cobalt complexes homogeneous catalysis photocatalysis water oxidation |
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