Abstract

The luminescence decay curves of ruthenium(II) complexes, chemically bound to TiO 2 and SiO 2 particles or physically adsorbed on TiO 2, SnO 2, SiO 2 and Al 2O 3 particles, in water were recorded. The excited Ru(II) complexes on the semiconductors had significantly shorter lifetimes than those on the insulators. The rates of electron transfer from the immobilized excited complexes to the semiconductors in H 2O and CH 2Cl 2 were estimated from these curves.

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