Novel homo- and hetero-nuclear copper(II) complexes of tetradentate Schiff bases: Synthesis, characterization, solvent-extraction and catalase-like activity studies
Novel homo- and hetero-nuclear copper(II) complexes of tetradentate Schiff bases: Synthesis, characterization, solvent-extraction and catalase-like activity studies
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DOI：
10.1016/j.jhazmat.2008.07.070
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发表时间：
2009-04-30
影响因子：
13.6
通讯作者：
Cengiz, Mustafa
中科院分区：
文献类型：
--
作者：
Dede, Buelent;Karipcin, Fatma;Cengiz, Mustafa
采用多步反应合成了12个含N-4个配体的四齿席夫碱铜（Ⅱ）配合物。通过元素分析、红外光谱、摩尔电导率、磁矩测量和热分析等手段对配合物进行了表征。三个席夫碱配体通过H-1和C-13 NMR谱进一步鉴定。所有铜（II）络合物都是1：2电解质，如它们在DMF中的摩尔电导率（λ（M））所示，并且是顺磁性的。用很强的反铁磁相互作用解释了双核和三核配合物的次正常磁矩值。通过对所选过渡金属离子（Mn ~（2+）、Co ~（2+）、Ni ~（2+）、Cu ~（2+）、Zn ~（2+）、Pb ~（2+）、Cd ~（2+）、Hg ~（2+））的液-液萃取，考察了配体的萃取能力。配体对铜离子表现出较强的结合能力。此外，均核和异核铜（II）配合物各自测试其在添加的碱咪唑的存在下催化过氧化氢反硝化的能力。(C)2008 Elsevier B. V.保留所有权利。
Twelve homo- and hetero-nuclear copper(II) complexes of tetradentate Schiff base ligands containing N-4 donor sets have been prepared by employing several steps. The characterization and nature of bonding of the complexes have been deduced from elemental analysis, FT-IR, molar conductivity, magnetic moment measurements and thermal analysis. The three Schiff base ligands were further identified using H-1 and C-13 NMR spectra. All copper(II) complexes are 1:2 electrolytes as shown by their molar conductivities (Lambda(M)) in DMF and paramagnetic. The subnormal magnetic moment values of the di- and tri-nuclear complexes explained by a very strong anti-ferromagnetic interaction. The extraction ability of the ligands has been examined by the liquid-liquid extraction of selected transition metal (Mn2+, Co2+, Ni2+, Cu2+, Zn2+, Pb2+, Cd2+, Hg2+) cations. The ligands show strong binding ability toward copper(II) ion. Furthermore the homo- and hetero-nuclear copper(II) complexes were each tested for their ability to catalyse the disproportionation of hydrogen peroxide in the presence of the added base imidazole. (C) 2008 Elsevier B.V. All rights reserved.