Reorganization Energy of Electron Transfer Reduction and Oxidation of Meso,meso-Linked Porphyrin Dimer

Abstract

ESR spectra of a benzonitrile solution of the radical cation of meso,meso-linked zinc porphyrin dimer produced by the electron transfer oxidation by one-equivalent of ruthenium(III) trisbipyridine complex exhibit the hyperfine structure due to interaction of an unparired electron with eight equivalent nitrogen nuclei. This indicates delocalazation of an unpaired electron on two porphpyrin units, which is also supported by the DFT calculation, the cyclic voltammograms and the time-resolved absorption spectra. The one-electron reduction of meso,meso-linked zinc porphyrin dimer is also reported.