Formation of superoxide-metal ion complexes and the electron transfer catalysis

摘要

The formation of a variety of superoxide-metal complexes and their catalytic functions have been reviewed. The g_zz-values of the EPR spectra of superoxide-metal ion complexes vary significantly depending on the type of metal ions. From the deviation of the g_zz value from the free spin value are determined the energy splitting values (△E) of π_g levels due to complex formation. The △E values correlate well with the catalytic reactivities of the metal ions in the electron transfer reduction of oxygen.