PHOTOPHYSICAL PROPERTIES OF METAL-COMPLEXES OF MESO-TETRAKIS(4-SULPHONATOPHENYL)PORPHYRIN

Laser kinetic spectroscopy was used to determine the photophysical par ameters (fluorescence and triplet-triplet (T-T) spectra, lifetimes of the triplet and singlet states, bimolecular constant for oxygen quench ing, fluorescence quantum yield acid quantum yield of formation of the triplet state) of the water-soluble complexes of Ag(II), Cd(II), Co(I I), Cu(II), Mg(II), Ni(II), Pd(II), Pt(II) and Zn(II) with the tetraso dium salt of meso-tetrakis (4-sulphonatophenyl) porphyrin (H2TPPS4). T he complexes of metals with d(0) and d(10) electron configurations (Cd (II), Mg(II) and Zn(II)) are characterized by high tripler quantum yie lds and strong fluorescence in the red spectral region and are thus mo re efficient photosensitizers than the ligand alone.