Theory of photoinduced intramolecular electron transfer in condensed media

In this paper, we are concerned with the theoretical treatment of intramolecular electron transfer (ET). In particular we are interested in the effect of the chemical groups connecting between donor and acceptor groups on electron transfer. We treat two cases. Type 1 refers to the situation where the energy difference between the LUMO of the connecting groups and the LUMO of the donor group is much larger than vibrational energies. Type 2 refers to the situation where the energy difference between the LUMO of the connecting groups and the LUMO of the donor group is comparable to vibrational energies. We show that Type 1 ET is similar to the Raman scattering while Type 2 ET is similar to the resonance Raman scattering.