Synthesis and characterization of 1,4-diazophenylene-bridged Cu-phthalocyanine polymer

Abstract

A novel type of phthalocyanine polymer, 1,4-diazophenylene-bridged Cu-phthalocyanine, was prepared from the diazonium salt of diaminobenzene and Cu(II) 1,8, 15,22-tetraaminophthalocyanine. The polymer is partially soluble in tetrahydrofuran, dichloromethane, and dimethylformamide. Characterization of the polymer was performed by IR and UV-visible spectroscopy, X-ray diffraction, ash analysis, viscometry, differential scanning calorimetry and thermogravimetric analysis. The molecular weight of the soluble part of the polymer was determined by ebullioscopy. Electrical conductivity of the polymer and its doped samples were determined by the 4-probe technique. It was found that the electrical conductivity increased up to 10-4 S/cm after doping. The redox behaviour of the polymer was investigated utilizing cyclic voltammetry.