Vibronic coupling of electronic states. IV. Harmonic CBO potentials with equal minima positions—the influence of different vibronic coupling strengths on the electronic absorption and emission spectra containing a longest‐wavelength electronically forbidden transition

Abstract

AbstractThe influence of vibronic coupling between two harmonic CBO potentials with equal minima positions on the electronic absorption and emission spectra is investigated in the framework of our model using the variational procedure. The numerical results, being identical with those obtained through the vibronic coupling model of Fulton, Gouterman, and Brickmann, are discussed with regard to the longest‐wavelength electronically forbidden transition, its vibrational structure, and the Stokes loss.