Ru(II)-2,2'-ビピリジン, 1, 10-フェナントロリン錯体の電解還元ESR

概要

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ESR study on the electrolytic reduction product of the first reduction process of Ru (II) complexes has been carried out at lower temperature to clarify the electronic sturucture. Reduction products of these complexes show one broad ESR signal whose g values range from 1.991 to 2.002, near that for free electron. From this it is confirmed that an unpaired electron is delocahzed in the π orbital. It has been found the g values for Ru(II)-bipyridine complexes vary with temperature, while that for Ru(II)-phenanthroline complex is constant at 2.002 independently with temperature. It is deduced that the unpaired electron in the reduction product of Ru(II）-bipyridine complexes is present in two diffrerent states whose energies are slightly different, while, in the case of Ru(II)-phenanthroline complexes, the unpaired electron is delocalized in the π orbital composed of ligand only.
1986-11-25