Thermal behavior of new nickel(II) complexes with unsaturated carboxylates and heterocyclic N-donor ligands
详细信息 查看全文
- 作者：Rodica Olar ; Ioana Dorina Vlaicu…
- 关键词：Nickel complexes ; Thermal analysis ; Acrylate ; Benzimidazole ; Antimicrobial activity
- 刊名：Journal of Thermal Analysis and Calorimetry
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：127
- 期：1
- 页码：731-741
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Physical Chemistry; Analytical Chemistry; Polymer Sciences; Inorganic Chemistry; Measurement Science and Instrumentation;
- 出版者：Springer Netherlands
- ISSN：1588-2926
- 卷排序：127
文摘
Synthesis and characterization of four new Ni(II) complexes with mixed ligands have been reported in the present paper. As interest ligands, acrylate (acr) ion together with one N-donor heterocyclic ligand, namely benzimidazole (HBzIm), 2-methylbenzimidazole (2-MeBzIm), 5-methylbenzimidazole (5-MeBzIm) or 5,6-dimethylbenzimidazole (5,6-Me2BzIm), was chosen. The syntheses afforded the complexes formulated as [Ni(HBzIm)2(acr)2(H2O)]·3H2O (1), [Ni(2-MeBzIm)2(acr)2(H2O)]·1.5H2O (2), [Ni(5-MeBzIm)2(acr)2(H2O)] (3) and [Ni(5,6-Me2BzIm)2(acr)2] (4). Complexes (1) and (2) contain crystallization water molecules and coordinated water molecules, both their nature and presence being confirmed on the basis of IR spectra and thermal analysis. In contrast to above-mentioned complexes, (3) contains only coordinated water molecule, while (4) is an anhydrous compound. Based on electronic spectra and magnetic measurements, a distorted octahedral stereochemistry was proposed for all Ni(II) complexes. Acrylate ions act both as unidentate and chelate ligands in complexes (1)–(3), while in complex (4) act only as chelate ligands. All used N-donor ligands function as monodentate in all Ni(II) complexes. Biological properties of complexes (1)–(4) were evaluated against several Gram(+), Gram(−) bacterial strains and against fungus Candida albicans.