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