the LUMO levels were sizably delocalized through the cyanoacrylic
acid and its adjacent p-bridge fragments, indicating that
the HOMOeLUMO excitation moves the electron distribution from
the donor to the cyanoacrylic acid moiety, thus facilitating an efficient
photoinduced/interfacial electron transfer from the excited
dye molecule to the TiO2 electrode through the effective intramolecular
charge separation under light irradiation.