Synthesis of a New trans-A_2B_2 Phthalocyanine Motif as a Building Block for Rodlike Phthalocyanine Polymers

摘要

Polyphthalocyanines have potential application in the development of electronic materials.One-dimensional polyphthalocyanines are accessible through monomers having a trans-A_2B_2 structure,but the preparation of a truly linear polyphthalocyanine is challenging because of limitations imposed by the geometry of phthalocyanines and the methodology for their synthesis.Benzimidazoporphyrazines are a known class of extra-annulated phthalocyanines.A trans-A_2B_2 benzimidazoporphyrazine is geometrically suitable for the preparation of rodlike polymers.A new synthesis of benzimidazoporphyrazines is presented as a stepping stone to the synthesis of trans-A_2B_2 benzimidazoporphyrazines.