Chemistry Letters, Vol.45, No.6, 619-621, 2016
Photocatalytic Water Oxidation Driven by Functionalized Ru(II) Photosensitizers: Effects of Molecular Charge and Immobilization of Molecular Photosensitizer
We synthesized a novel tris(bipyridyl)Ru(II) complex with sulfonic acid groups, [Ru(dSbpy)(bpy)(2)] (RuCS2; H(2)dSbpy: 2,2'-bipyridine-4,4'-bis(methanesulfonic acid)). The photosensitizing efficiency of water oxidation in the presence of a Na2S2O8 sacrificial electron acceptor was higher than that of the widely used phosphonic acid analog, [Ru(H(4)dPbpy)(bpy)(2)]Cl-2 (RuCP2; H(4)dPbpy: 2,2'-bipyridine-4,4'-bis(methanephosphonic acid)). The photosensitizing efficiency of RuCP2 for water oxidation was remarkably enhanced by immobilization onto semiconducting TiO2 nanoparticles.