Synthesis of Polyphosphazenes Bearing Covalently Linked Copper Phthalocyanine Units

摘要

Soluble poly(organophosphazenes) bearing covalently bound copper phthalocyanine side groups have been synthesized. The synthesis pathway involved the preparation of a high molecular weight poly-bis(aryloxy)phosphazene) in which 90% of the side groups were phenoxy and 10% were o-dicyanoaryl units. Condensation of this species with a large excess of phthalonitrile, 1,2-dicyanobenzene, 1,2-dicyano-4,5-bis(phenoxymethyl) benzene, or 4,5-bis(methoxyethoxy)methyl)-1,2-dicynaobenzene in DMF and in the presence of CuBr yielded open-chain polymers with phthalocyanine side groups covalently linked to the phosphazene chain. On the basis of UV/vis spectral data it was shown that the polymeric phthalocyanine did not aggregate in a variety of solvents. The synthesis of small-molecule, cyclic trimeric model analogues of these polymers has also been accomplished. The solubilities of these small-molecule cyclotriphosphazenyl phtalocyanines are much higher than those of the free phthalocyanines. Keywords: Phosphazenes; Polymers; Electrical; Conductivity; Phthalocyanines.