Photoinduced energy and electron transfer processes in rigidly bridged dinuclear Ru/Os complexes

In an attempt to elucidate the role played by the various factors-distance, geometry, electronic nature of the bridging ligand-which control the occur rence of intercomponent electronic energy and electron transfer in dinuclea r systems, several photophysical studies have been reported. In this contri bution we discuss the photoinduced energy and electron transfer processes o ccurring in rigid systems containing ruthenium and/or osmium metal units pr epared in our laboratories, and compare them with the results obtained with compounds described by other authors. The choice of spacers, connections, chelating sites, and metal units used to construct photoactive systems is d escribed. (C) 1998 Elsevier Science S.A. All rights reserved.