NEW EXPLANATION FOR THE LACK OF THE INVERTED REGION IN CHARGE SEPARATION REACTIONS

According to the Marcus theory, the first-order rate constant of electron transfer between donor and acceptor depends on the donor-acceptor distance through the transfer integral and the reorganization energy. The second-order diffusion-mediated rate constant for charge separation reaction was calculated by using a recently developed theory of diffusion-mediated reactions and by properly taking into account the donor-acceptor distance dependence of the first-order rate constant. A new explanation for the lack of the inverted region is given.