Water Oxidation Catalyzed by a Dinuclear Cobalt–Polypyridine Complex | Zendy

Wang HongYan | Zendy; Mijangos Edgar | Zendy; Ott Sascha | Zendy; Thapper Anders | Zendy

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Water Oxidation Catalyzed by a Dinuclear Cobalt–Polypyridine Complex

Author(s) -

Wang HongYan,

Mijangos Edgar,

Ott Sascha,

Thapper Anders

Publication year - 2014

Publication title -

angewandte chemie

Language(s) - English

Resource type - Journals

eISSN - 1521-3757

pISSN - 0044-8249

DOI - 10.1002/ange.201406540

Subject(s) - catalysis , chemistry , cobalt , electron paramagnetic resonance , turnover number , amine gas treating , kinetics , homogeneous , oxygen , homogeneous catalysis , medicinal chemistry , tris , photochemistry , molecular oxygen , inorganic chemistry , organic chemistry , biochemistry , physics , nuclear magnetic resonance , quantum mechanics , thermodynamics

The dinuclear Co complex [(TPA)Co(μ‐OH)(μ‐O 2 )Co(TPA)](ClO 4 ) 3 ( 1 , TPA=tris(2‐pyridylmethyl)amine) catalyzes the oxidation of water. In the presence of [Ru(bpy) 3 ] 2+ and S 2 O 8 2− , 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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