Design of supramolecular systems for spectral sensitization of semiconductors

Abstract A “supramolecular approach” to the design of photosensitizers for wide band-gap semiconductors is sketched. Interesting possibilities are identified in terms of photoinduced charge separation and antenna effect . A number of experimental studies are discussed to emphasize: (i) the versatility of systems based on transition metal complexes, in terms of tunability and synthetic control of photophysical and redox properties; (ii) the availability of a variety of specific fast photophysical methods (luminescence techniques, UV/VIS laser flash spectroscopy, time-resolved resonance Raman and infrared spectroscopies) for monitoring intercomponent energy and electron transfer processes; (iii) the achievement of a fair degree of kinetic control on such processes by molecular design.

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