Adsorption dynamics of the N719 dye on nanoporous titanium oxides studied by resonance Raman scattering and Fourier transform infrared spectroscopy

► Vibrational spectroscopies were conducted for N719 dye-sensitized TiO2. ► A monolayer of the N719 formed on the TiO2 surface with a time constant of 25 min. ► The carboxylate of the adsorbed N719 took bidentate chelate or bridging linkages. ► The intermolecular π-π interactions grew stronger at higher dye densities.