Non‐radiative deactivation of molecules. II. Theoretical study of the internal conversion rates in azulene

Based on completely optimized molecular geometries of the photophysically relevant electronic states, the corresponding vibrational energies and wave functions and the theoretical rate constants for the internal conversion processes of azulene within the Sp, term system are presented. The influence of the promoting and accepting modes on the radiationless deactivation rates is discussed. An analysis of the active nonradiative modes is given. In context with the respective theoretical radiative rates, the efficiency of the different azulene fluorescences is interpreted.