INTRAMOLECULAR ELECTRON-TRANSFER IN PERIPHERALLY METALATED TETRAPHENYL PORPHYRIN DERIVATIVES CONTAINING MOLYBDENUM MONONITROSYL REDOX CENTERS

Picosecond laser spectroscopy measurements on the novel complexes [Mo(NO)(L)Cl(Etpp)] [Etpp = 5-(E-substituted phenyl-10,15,20-triphenylporphyrin; L = hydrotris(3,5-dimethylpyrazol-1-yl)borate, E = para-O, meta-O, ortho-O; para-NH] indicate that the observed fluorescence quenching in these compounds is due to fast (τ < 30 ps) intramolecular charge separation to produce transient species with lifetimes in the range 120-290 ps