Electrochemical Determination of Charge Transfer Direction of “Center-to-Edge” Phosphorus(V) Porphyrin Arrays

Abstract

The redox properties of a series of “center-to-edge” phosphorus(V) porphyrin arrays composed of similar porphyrin units were investigated by cyclic voltammetry. From the assignments of the reduction peaks, it was revealed that small difference of electron-donating ability of the axial ligands and the electrostatic intramolecular interaction affect their redox potentials. Moreover, the comparison of the reduction potentials enables to determine the polarization direction of the charge transfer excited-state of the porphyrin arrays.