Electric and magnetic characteristics of metal-free polymers containing azaporphine macrocycles

Abstract

The electric and magnetic characteristics of metal-free polymers with azaporphine macrocycles in varying regular series were compared with the structural parameters of macromolecules, such as the macromolecule size, the length of conjugation regions, and the concentration of free peripheral CN groups. It was found that the array of the test polymers in general exhibits an average statistical tendency characteristic of organic semiconductors: as the molecular mass of macromolecules and, correspondingly, the conjugation chain length increase, the conductivity increases and the ESR signal narrows. For the revealed case of an abnormal drop in conductivity with an increase in the molecular mass, unequivocal evidence was obtained as to which of two possible factors responsible for the abnormality (breaking the continuous π-conjugation chain in the macromolecule or the emergence of intermolecular barriers) takes place in each particular series of such polymers.