Synthesis, crystal structure and electrocatalytic behavior of a copper (II) complex derived from acylpyrazolone double Schiff bases

Abstract

A new double Schiff base complex, Cu(PMαFP) 2 en (HPMαFP = 1-phenyl-3-methyl-4-(2-furoyl)-5-pyrazolone, en = ethylenediamine), has been synthesized and characterized by elemental analysis, IR, UV, fluorescence spectra, thermal analysis, X-ray single crystal diffraction and cyclic voltammetry (CV). Its crystal structure is monoclinic with space group Pbca and cell parameters: a = 22.263(3)Å, b = 13.671(2)Å, c = 10.0920(16)Å, Z = 4, S = 1.028, R 1 = 0.0500 and wR 2 = 0.1285. It was found that the Cu 2+ ion is located in the coordination center. The Cu(II) has a slightly distorted plane quadrilateral coordination environment with two oxygen atoms and two nitrogen atoms of double Schiff base ligand in the equatorial plane. The complex has a one-dimensional chain supramolecular structure, which is connected by C-H ...N bonding interactions. In the electrochemical experiments, the CV curve displays an oxidation peak in the presence of uric acid with Ep = 0.216V in pH = 7.0, showing that the Cu(PMαFP) 2 en/glassy carbon modified electrode has an electrocatalytic activity toward uric acid.

Synthesis and Conjoint Experimental-DFT Characterization of Some Pyrazolone Functionalized Dioxovanadium (V) Schiff Base Complexes

“…Very recently, the application of such compounds in apoptosis of Hela cancer cells has been reported. Their metal complexes have shown peculiar redox behaviour [4][5][6][7][8][9][10][11]. The structural determination of such complexes have gained much attention at both experimental as well as theoretical approaches [12,13].…”

Synthesis and Conjoint Experimental - DFT Characterization of some Pyrazolone Functionalized Dioxovanadium (V) Schiff Base Complexes

“…Very recently, the application of such compounds in apoptosis of Hela cancer cells [10] has been reported. Their metal complexes have shown peculiar redox behavior [11]. The structural determinations of such complexes have gained much attention at both experimental as well as theoretical approaches [12,13].…”