KINETICS OF PARTLY DIFFUSION CONTROLLED REACTIONS .22. DIFFUSION EFFECTS ON THE KINETICS OF EXCIMER FORMATION

The kinetics of intermolecular excimer formation are considered in the case where the formation rate is diffusion controlled. As a first step, we assume that an instantaneous monomer-excimer equilibrium occurs: It provides some interesting insights into the influence of the back-reaction on diffusion-controlled reactions. A more realistic model is then developed to provide a complete description of the reaction. Predictions of this model are compared with those of simplified models and with the classic expression for the diffusion-controlled forward rate coefficient. © 1990 American Chemical Society.