title: Photoelectrochemical properties of supramolecular species containing porphyrin and ruthenium complexes on TiO(2) films.
abstract: 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.
authors.affiliation: Instituto de Quimica - Universidade de Sao Paulo, C P 26077, CEP 05513-970, Sao Paulo - Brazil.
authors.forename: Ana F
authors.initials: AF
authors.lastname: Nogueira
authors.forename: Andre Luiz B
authors.initials: AL
authors.lastname: Formiga
authors.forename: Herbert
authors.initials: H
authors.lastname: Winnischofer
authors.forename: Marcelo
authors.initials: M
authors.lastname: Nakamura
authors.forename: Fabio M
authors.initials: FM
authors.lastname: Engelmann
authors.forename: Koiti
authors.initials: K
authors.lastname: Araki
authors.forename: Henrique E
authors.initials: HE
authors.lastname: Toma