Influence of phonons on optically detected magnetic resonances of aromatic molecules in amorphous hosts

Abstract

We present phosphorescence wavelength selected optically detected magnetic resonance (ODMR) experiments on some aromatic molecules in organic glasses. The change of the ODMR frequency and width as a function of phosphorescence wavelength is interpreted in terms of a spinless stochastic Hamiltonian which describes the interaction between the probe molecule and the solvent. It is shown that the phonons in the optical spectra have a significant influence on the parameters of the ODMR profile.