Synthesis, crystal structure and superoxide dismutase activity of two new bis(μ-acetato/μ-nitrato) bridged copper(II) complexes with N′-[phenyl(pyridin-2-yl)methylidene]benzohydrazone

被引：54

作者：

Patel, R. N. ^{[1
]}

Patel, Dinesh K. ^{[1
]}

Sondhiya, Vishnu P. ^{[1
]}

Shukla, K. K. ^{[1
]}

Singh, Y. ^{[1
]}

Kumar, A. ^{[2
]}

机构：

[1] APS Univ, Dept Chem, Rewa 486003, MP, India

[2] Univ Lucknow, Fac Sci, Lucknow 226007, Uttar Pradesh, India

来源：

INORGANICA CHIMICA ACTA | 2013年 / 405卷

关键词：

Crystal structure; Hydrazone; Density functional theory; Epr; Superoxide dismutase activity; ELECTRON-SPIN-RESONANCE; DINUCLEAR COMPLEXES; BINUCLEAR COMPLEXES; LIGANDS; COORDINATION; CHEMISTRY; NITROGEN; ION;

D O I：

10.1016/j.ica.2013.05.024

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Two homodinuclear copper(II) end-on bis(mu-acetato/mu-nitrato) bridged complexes with two NNO donor ligands, viz., [(L)Cu(mu-CH3COO)(2)Cu(L)] (1) and [(L)Cu(mu-NO3)(2)Cu(L)] (2) (where L = N'-[phenyl(pyridin-2-yl)methylidene]benzohydrazone) are reported. Both complexes are structurally characterized using single crystal X-ray diffraction studies and belong to monoclinic crystal system having space group P2(1)/n. The distance between two copper centers is 3.344(8) and 3.406(7) angstrom respectively for 1 and 2. On the basis of density function theory (DFT) calculations, the electronic excitations involve transitions mainly from metal-ligand bonding MOs to the beta-LUMO within the dominant Cu d(xy) character and to beta-LUMO+1. Epr spectra for polycrystalline samples exhibited the copper(II) hyperfine structures as well as zero-field splitting which are appropriate for triplet state of such a dimmers. Complexes effectively catalyze the dismutation of superoxide (O-2(-)) in alkaline nitro blue tetrazolium chloride assay and IC50 values were determined. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：209 / 217

页数：9

共 50 条

[21] Unprecedented low Cu-N(azide)-Cu angles in end-on double azido bridged copper(II) complex [J].