RIGID-ROD POLYMERS WITH REGULARLY SPACED SILICON-CENTERED PHTHALOCYANINE UNITS IN THE BACKBONE

We describe the synthesis of new rigid rod polymers possessing a backb one of silicon phthalocyanine units and stiff 4,4'-dioxybiphenyl or 2, 6-dioxynaphthalene spacers. These modified phthalocyaninato-polysiloxa ne derivatives are characterised by mass, absorption and C-13-CP-MAS s pectroscopies, differential scanning calorimetry and X-ray powder diff ractometry. UV/VIS spectra show only slight differences to the corresp onding phthalocyanine monomers, which indicates the absence of excited state interactions between the chromophores within the polymer backbo ne.