The Role of the Promoting Mode in Nonradiative Transitions in Large Molecules

Abstract

Abstract A rate expression for the intramolecular nonradiative transition where a promoting mode acts also as an accepting mode at the same time has been derived within the statistical limit. The dependence of the nonradiative transition rate on the shift of the equilibrium point of the promoting mode in the relevant electronic states, Δp, has been examined for two cases, i) excited \ightsquigarrow ground states and ii) excited \ightsquigarrow excited states, in aromatic hydrocarbons which satisfy the above condition.