POLYNUCLEAR METAL-COMPLEXES AS SUPRAMOLECULAR SPECIES - INTERCOMPONENT ENERGY-TRANSFER AND ELECTRON-TRANSFER PROCESSES IN HOMOGENEOUS AND HETEROGENEOUS PHASES

A series of cyano-bridged polynuclear complexes have been prepared in the context of intramolecular energy and electron-transfer studies. Ex perimental results are discussed to emphasize that (i) a valence local ized description is generally appropriate for such complexes, (ii) tim e-resolved resonance Raman and infrared spectroscopies can be successf ully applied to the study of the excited-state intercomponent processe s, (iii) polynuclear species capable of supporting efficient intramole cular energy transfer can be used for the visible sensitization of wid e-band gap semiconductors.