Nucleophilic substitution in 4-bromo-5-nitrophthalodinitrile: XI. Preparation, properties, and prediction of mesomorphism in mixed-substituted phthalocyanines containing aryloxy and benzotriazole fragments
Stepwise nucleophilic substitution of bromine and nitro group in 4-bromo-5-nitrophthalodinitrile has led to a series of phthalonitriles containing benzotriazole and aryloxy fragments; basing on them, the mixed-substituted phthalocyanines have been prepare