Effect of high pressures on molecular electronic spectra and electronic relaxation

The purpose of this paper has been to develop a theoretical model which can be used to deal with the effect of high pressure on the spectral band shapes and frequency shifts of molecular electronic spectra, rates of electronic relaxation, transformation of electronic structures, etc. We have shown that this model predicts that the pressure-induced frequency shifts of vibronic bands are the same for different vibronic bands, the pressure dependence of the frequency shifts is parabolic, the relation between the rate of nonradiative decays and external pressure is exponential, and the pressure effect on the rate of nonradiative decays and the pressure-induced frequency shift of the corresponding electronic transition are closely related.