Intermolecular vibronic coupling and energy transfer in a flat molecular aggregate

Summary The migration of excitation within a small flat molecular aggregate composed of identical molecules is described using a Davidov-like model and a mechanism of excitation transfer of Förster type. We consider in this model the changes that take place in the equilibrium position of each molecule upon excitation and construct energy surfaces that describe paths, that is, conditions for excitation localization and transfer that govern, in first-order, the motion of excitation within the aggregate.Presented in part at XVIII Jornadas Chilenas de Química, Santiago, 1989