Issue 12, 1981

Photo-oxidation of water to oxygen sensitised by tris(2,2′-bipyridyl)ruthenium(II)

Abstract

Irradiation of tris(2,2′-bipyridyl)ruthenium(II) in aqueous solution containing a sacrificial electron acceptor results in formation of bipy3Ru3+, a powerful oxidant which is able, in the presence of a redox catalyst, to oxidise water to O2. Both colloidal RuO2 and simple cobalt(II) ions are effective catalysts for O2 production and, with [Co(NH3)5Cl]2+ as sacrificial electron acceptor, the quantum efficiency for formation of O2 was ca. 12 %. However, when the sacrificial electron acceptor was replaced with Fe3+, which is a reversible redox couple, no O2 was observed upon prolonged irradiation. The absence of O2 in this latter system can be explained by kinetic considerations.

Article information

Article type
Paper

J. Chem. Soc., Faraday Trans. 2, 1981,77, 2373-2383

Photo-oxidation of water to oxygen sensitised by tris(2,2′-bipyridyl)ruthenium(II)

A. Harriman, G. Porter and P. Walters, J. Chem. Soc., Faraday Trans. 2, 1981, 77, 2373 DOI: 10.1039/F29817702373

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