FEATURES OF SENSITIZED PHOSPHORESCENCE AND DELAYED ANNIHILATION FLUORESCENCE SPECTRA OF CORONENE IN FROZEN SOLUTIONS

摘要

We have studied the sensitized phosphorescence spectra of coronene in toluene and its delayed annihilation fluorescence spectra in n-decane at 77 K. We show that as a result of perturbation of electronic states by exchange interactions, intensity redistribution occurs in both the sensitized phosphorescence spectrum and the delayed annihilation fluorescence spectrum. The nonzero probability of the symmetry-forbidden radiative 0-0 transition is explained by the lower symmetry of the bimolecular system compared with the symmetry of the coronene molecule.