Synthesis and characterization of some phthalic acid derivatives precursors for phthalocyanine chromogens

Abstract

The article presents experimental data regarding some organic compounds as chemical intermediates with phthalic acid structure, precursors for new phthalocyanine compounds as : 4-nitrophthalimide, 4-aminophthalimide, 4-nitrophthalonitrile and 4-aminophthalonitrile, synthesized by chemical transformation of phthalimide by a series of successive reactions as : nitration and reduction, or nitration, amidation, dehydration and reduction. Reaction products were purified and characterized by means of elemental analysis, UV-Vis, fluorescence, IR, 1H-NMR, 13C-NMR spectroscopy, and thermal analysis. Structure-property relationship in the organic compounds is discussed with respect to the nature of the substituents.