Transfer of Excitation Energy in Solid Solutions of Anthracene-Polystyrene and 9,10-Diphenylanthracene-Polystyrene

Abstract

The transfer of excitation energy from the excited solvent to the solute has been studied as a function of solute concentration for solid solutions of anthracene and 9,10‐diphenylanthracene in polystyrene. Transfer efficiencies and fluorescence spectra have been obtained for both systems. The fluorescent light pulse of both systems, when excited by electrons and uv radiation, was recorded and analyzed. Results indicate that radiative transfer predominates at low solute concentration, while at higher solute concentration the transfer process is predominantly nonradiative. Differences between the two systems are probably due to anthracene being chemically bound to the polymer chain while 9,10‐diphenylanthracene is not.