Synthesis,characterisation of few N-substituted 1,8-naphthalimide derivatives and their copper(II) complexes

摘要

A few 1,8-naphthalimide derivatives with phenyl (1),benzyl (2),3,4-dimethoxyphenyl ethyl (3),4-pyridyl (4),2-hydroxy ethyl (5),4-pyridylmethyl (6) groups attached to the nitrogen atom are synthesized and characterized.Cyclic voltammograms of all these compounds show one-electron reversible redox cycle (approx=-1.24 V to -1.18 V) due to formation of anion radicals.However,in the case of (5),quenching of this redox process occurs when polyhydroxy-aromatic compounds such as 1,3-dihydroxy benzene and 1,3,5-trihydroxybenzene are added.Copper complexes,namely bis-{N-(4-pyridylmethyl)l,8-naphthal-imide}copper (II) perchlorate (8),bis-{N-(4-pyridylmethyl)l,8-naphthalimide}copper (II) perchlorate (9) and bis-{N-(4-pyridylmethyl)phthalimide} copper (II) perchlorate (10) are synthesized and characterised.The complexes (8) and (9) show reversible redox couple of the ligand without any significant interaction with the redox active copper (II) centre.