Polymeric phthalocyanines and their precursors, 14. Synthesis and analytical characterization of polymers from oxy‐ and arylenedioxy‐bridged diphthalonitriles

Phthalocyanine moieties containing polymers 3 a – e were prepared by the reaction of several oxy‐ and arylenedioxy‐bridged diphthalonitriles 2 a – e in the absence or the presence of metal salts or metals. The structure of the polymers was thoroughly discussed on the basis of their IR and UV/VIS spectra. According to the nitrile end groups determined by IR spectroscopy, the structurally uniform polymers consist of phthalocyanine moieties. Saponification of the nitrile end groups of 3 a – e leads to polymeric phthalocyanines with carboxylic acid end groups with a lower degree of annulation than that of the polymers before saponification. The low‐molecular‐weight phthalocyanines 5a, b were prepared as model compounds for the polymers.