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Photoelectrochemical properties of supramolecular species containing porphyrin and ruthenium complexes on TiO(2) films.

Nogueira, Ana F; Formiga, Andre Luiz B; Winnischofer, Herbert; Nakamura, Marcelo; Engelmann, Fabio M; Araki, Koiti; Toma, Henrique E.
Photochem Photobiol Sci; 3(1): 56-62, 2004 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-14743280
Modification of wide band gap semiconductor surfaces by a new generation of supramolecular sensitizers, combining porphyrin and ruthenium-phenanthroline complexes leads to versatile molecular interfaces, allowing the exploitation of photoinduced charge transfer in dye sensitized photoelectrochemical cells. meso-Tetrapyridylporphyrin coordinated to two ruthenium complexes converts 21% of the incident photons into current after excitation at the Soret band. In this work we discuss the electron/energy transfer mechanisms involved in the TiO(2) sensitization by these supramolecular species, invoking some theoretical calculations.
Selo DaSilva