Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 53, Issue 52, Pages 14499-14502Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201406540
Keywords
dinuclear cobalt complexes; homogeneous catalysis; photocatalysis; water oxidation
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Funding
- Swedish Energy Agency
- Knut and Alice Wallenberg Foundation
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The dinuclear Co complex [(TPA)Co(mu-OH)(mu-O-2)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(O-2) mol(1)(-1) s(-1) and a maximal turnover number (TON) of 58 +/- 5 mol(O-2) 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 O-2 evolution kinetics.
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