Rigid rod polymers with regularly spaced silicon-centered phthalocyanine units in the backbone

We describe the synthesis of new rigid rod polymers possessing a backbone of silicon phthalo-cyanine units and stiff 4,4′-dioxybiphenyl or 2,6-dioxynaphthalene spacers. These modified phthalocyaninato-polysiloxane derivatives are characterised by mass, absorption and ¹³C-CPMAS spectroscopies, differential scanning calorimetry and X-ray powder diffractometry. UV/VIS spectra show only slight differences to the corresponding phthalocyanine monomers, which indicates the absence of excited state interactions between the chromophores within the polymer backbone.