Physical and Chemical Properties of Polyporphyrin Films Based on the Mn Complexes of Amino-Substituted Tetraphenylporphyrin

Abstract

The article presents the results of the study of electrochemical deposition and the physicochemical properties of polyporphyrin films deposited on glassy carbon, platinum, and ITO electrodes. Electropolymerization of Mn(III) 5,10,15,20-tetrakis(3-aminophenyl)porphyrin chloride from different solvents and in different deposition modes is carried out. In the process of electrooxidation of porphyrin monomer in solutions of dichloromethane and ethanol, polyporphyrin films are formed on the working electrode in the potential range from 0 to +2 V. The electropolymerization process is studied using the quartz microbalance method. The physicochemical properties of the films are studied using various methods: UV-VIS spectrophotometry, IR spectroscopy, scanning electron microscopy, atomic force microscopy, photo-EMF method. The number of electrons participating in the electropolymerization process is determined. Spectral methods show that a porphyrin structure is retained in the film, and in the process of electropolymerization, it is possible to incorporate μ-oxodimers into the composition of the film. It is found that the obtained polyporphyrin films possess semiconductor properties.