Synthesis and properties of phthalonitriles with an azo chromophore and related phthalocyanines

The 4-R-phenylazophenoxyphthalonitriles were synthesized by the reaction of 4-bromophthalonitrile with 4-R-phenylazophenols and were used to obtain tetra-R-phenylazophenoxyphthalocyanines and their metal complexes. The effect of substituents on the spectral and other properties of the synthesized compounds was established.