New copper(II) complexes of 2-hydroxyacetophenone N(4)-substituted thiosemicarbazones and polypyridyl co-ligands: structural, electrochemical and antimicrobial studies
作者:Rohith P. John、A. Sreekanth、V. Rajakannan、T.A. Ajith、M.R. Prathapachandra Kurup
DOI:10.1016/j.poly.2004.09.004
日期:2004.10
Abstract Seven new copper(II) complexes of 2-hydroxyacetophenone N(4)-substituted thiosemicarbazones (H2L) and bidentate polypyridyl compounds 2,2′-bipyridine and 1,10-phenanthroline (B) were prepared and characterized. The thiosemicarbazones bind to the metal as dianionic ONS donors (L2−) and yield compounds of the stochiometry [MLB]. The structure of the compound [Cu(L4)(2,2′-bipy)] (6) was investigated
摘要制备并表征了七个新的2-羟基苯乙酮N(4)-取代的硫代氨基甲唑酮(H2L)和二齿多吡啶基化合物2,2'-联吡啶和1,10-菲咯啉(B)的铜(II)配合物。硫代半咔唑酮作为阴离子ONS供体(L2-)与金属结合,并产生化学计量比的化合物[MLB]。通过单晶X射线衍射法研究了化合物[Cu(L4)(2,2'-bipy)](6)的结构。自旋哈密顿量和从EPR光谱计算得出的化合物的键合参数表明该化合物具有方形金字塔(SPY)结构。g值预测具有B1g基态的C4v对称性的几何形状。键合参数显示出显着的平面内π键合。配合物的循环伏安法研究表明,对应于Cu(II / I)对的不可逆氧化还原峰和对应于铜(II / III)氧化的准可逆氧化还原峰。硫半脲及其铜配合物对大肠杆菌,金黄色葡萄球菌,真菌白色念珠菌和黄曲霉具有显着的生长抑制活性。