SYNTHESIS AND PHOTOCONDUCTIVITY STUDY OF PHTHALOCYANINE POLYMERS .2. PVK-CO-CUPC (COOH)3

Cu-phthalocyanine diimide (Cu-diPc) was synthesized from a mixture of phthalic anhydride and pyromellitic dianhydride. By the hydrolysis of Cu-diPc, Cu-4,4',5,5'-tetracarboxyphthalocyanine (Cu-taPc) was obtained. A novel polymer of polyvinylcarbazole-bonded CuPc(COOH)3 (I) was synthesized by the Friedel-Crafts reaction of polyvinylcarbazole (PVK) with Cu-phthalocyanine-4,4',5,5'-tetraacid chloride. Polymer (I) contains ca. 5 mol % CuPc(COOH)3 rings, which are covalently bonded to PVK. Polymer (I) shows good photoconductivity, which is much better than that of the corresponding phthalocyanine monomers. The factors that influence the photoconductivity, such as the thickness of IFL, and the types and proportion of CTM, were also studied.