Synthesis, structure and fluorescence of copper(II) complex with substituted aroylhydrazone and monodentate N-heterocycle

A ternary copper(II) complex, [Cu(L)(ampy)], with a substituted aroylhydrazone, 5-bromosalicylaldehyde benzoylhydrazone (H2L) and monodentate N-heterocycle, 2-aminopyridine (ampy), has been synthesized and characterized by IR spectra, UV spectra, fluorescence spectra and cyclic voltammetry. The single crystal structure of [Cu(L)(ampy)] reveals that the Cu(H) is in a square-planar N2O2 coordination environment formed by the phenolate-O, the imine-N and the deprotonated amide-O atoms of L2-, and the N atom of ampy. In the crystal, the complex is involved in N-H center dot center dot O and N-H center dot center dot center dot N hydrogen bonds, leading to a 1D chain arrangement.