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A molecular device for photoinitiated electron collection at a metal center, (bpy) 2Ru (dpp) 2RhCl2 (PF6) 5, has been studied and shown to photocatalytically produce H2 from H2O. This system absorbs visible light and in the presence of an electron donor is reduced by multiple electrons. In the presence of water, the (bpy) 2Ru (dpp) 2RhCl2 (PF6) 5 system photocatalytically produces H2 that varies linearly with photolysis time. The photocatalyst functions in the presence of chloride, but the yield of H2 is lower, consistent with chloride loss being important in the photocatalysis cycle
Elvington et al. (Tue,) studied this question.