Electron transfer in condensed media with mobile defects

A study has been made of electron transfer in a condensed polar medium containing two types of dynamically changing intrinsic parameters — static polarization and mobile defects, interacting locally with electronic states of the reactants. An expression has been obtained for the rate constant of a homogeneous, nonadiabatic, charge transfer reaction with allowance for large-scale and local fluctuations of the intrinsic parameters of the medium. It is shown that, along with fluctuations of the static polarization, Brownian motion of defects close to the reactants may lead to a significant variance of the electronic levels of the donor and acceptor.