Isomers of β-substituted di and tri-nitrotetraphenylporphyrins and their copper (II) derivatives: Structure, optical and electrochemical redox properties

摘要

controlled nitration of meso-tetraphenylporphyrinatocopper (II) using fuming nitric acid leads to the formation of different β-substituted nitro derivatives. Five isomers of dinitro and three isomers of trinitrotetraphenylporphyrins have Been isolated and characterised using FAB/MS, ~1H NMR, UV-VIS and IR Spectroscopies. The single crystal X-ray data on the copper (II) derivative of one of The isomers of trinitrotetraphenylporphyrin revealed 'saddle' conformation of The porphyrin core resulting from the nitro group substitution at the β-pyrrole Carbons.