Spectral Properties and Deactivation Processes of Anionic Porphyrin Coupled with TiO2 Nanostructure
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Meso-tetrakis (4-sulphonatophenyl)porphyrin (TSPP) and its complex with TiO2 were studied by absorption, fluorescence, and steady-state and time-resolved photothermal spectroscopy. A TiO2–TSPP complex was obtained by covalent bonding of anionic porphyrin with the nanostructural form of TiO2. The TiO2 colloidal carriers modifying the thermal energy distribution and considerably influencing the photophysical processes were found to lead to changes in the population of the porphyrin singlet and triplet states, resulting in singlet oxygen generation and/or electron transfer.
KeywordsOptical and photothermal spectroscopy Porphyrin Singlet oxygen TiO2 nanostructure
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