ABSORPTION AND FLUORESCENCE CHARACTERIZATION OF GE(II) AND SN(II) OCTAETHYLPORPHYRIN CHLORIDE

The absorption, emission, and excitation spectra of germanium and tin octaethylporphyrin chloride (OEPGeCl2, OEPSnCl2) in some selected orga nic solvents of different polarities have been studied. Quantitative t reatment of the solvent effect on the absorption spectra indicates the importance of electrophilic solvent properties in the determination o f the (B) band position. The fluorescence quantum yields in the select ed solvents were determined and correlated with the specific and non-s pecific solvent parameters. The fluorescence lifetimes were determined . The fluorescence of the compounds were found to be quenched by an el ectron-deficient molecule. The bimolecular quenching rate constants we re calculated and the quenching was found to be diffusion controlled,