RADICAL PAIR MECHANISM OF CIDEP GENERATION - CONTRIBUTION OF THE DIPOLE DIPOLE INTERACTION

The effect of the electron dipole-dipole interaction (DDI) in multiplet chemically induced dynamic electron polarization (CIDEP) generated in radical pair (RP) recombination is investigated. It is demonstrated within some models that DDI results in multiplet CIDEP like exchange interaction (EI) but of the sign opposite to that of EI induced one, corresponding to negative EI. It is shown that in principle DDI effect can be responsible for change of the sign of multiplet CIDEP at large times recently observed for a number of RPs.