ELECTRON-TRANSFER IN MIXED-VALENCE CLUSTERS - SPIN-DEPENDENT DIELECTRIC LOSS AND HAMILTONIAN PARAMETERS

The dielectric relaxational processes (low-frequency electric field ab sorption, or dielectric losses) in mixed-valence clusters are investig ated by using a binuclear cluster example. We show that study of these processes can provide valuable information about electron transfer. I n particular, study of the frequency-dependent loss for a range of tem peratures permits (in the Robin/Day classes I and II) experimental est imation of the tunneling and electronic asymmetry parameters. The effe ctive activation energy can also be found from the temperature depende nce, and this, in turn, fixes the reorganization energy.