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Antimicrobial Activity and Spectral Magnetic and Thermal Studies of Some Transition Metal Complexes of a Schiff Base Hydrazone Containing a Quinoline Moiety

机译:含喹啉基席夫碱Hy的某些过渡金属配合物的抗菌活性和光谱磁和热研究

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摘要

A series of new copper(II), cobalt(II), nickel(II), manganese(II), iron(III), and uranyl(VI) complexes of the Schiff base hydrazone 7-chloro-4-(benzylidene-hydrazo)quinoline (>HL) were prepared and characterized. The Schiff base behaves as a monobasic bidentate ligand. Mononuclear complexes with the general composition [ML2(Cl)m(H2O)2(OEt)n]·xEtOH (M = Cu(II), Co(II), Ni(II), Mn(II), Fe(III) or UO2(VI); m and n = 0-1; x = 1-3) were obtained in the presence of Li(OH) as a deprotonating agent. The nature of bonding and the stereochemistry of the complexes have been deduced from elemental analyses, infrared, electronic spectra, magnetic susceptibility and conductivity measurements. An octahedral geometry was suggested for all the complexes except the Cu(II) and UO2(VI) ones. The Cu(II) complex has a square-planar geometry distorted towards tetrahedral, while the UO2(VI) complex displays its favored heptacoordination. The Schiff base ligand, >HL, and its complexes were tested against one strain Gram +ve bacteria (Staphylococcus aureus), Gram -ve bacteria (Escherichia coli), and Fungi (Candida albicans). The prepared metal complexes exhibited higher antibacterial activities than the parent ligand and their biopotency is discussed.
机译:席夫碱7-氯-4-(苄叉基-azo唑)的一系列新的铜(II),钴(II),镍(II),锰(II),铁(III)和铀基(VI)配合物制备并表征了喹啉(> HL )。席夫碱表现为一元二齿配体。一般组成为[ML2(Cl)m(H2O)2(OEt)n]·xEtOH的单核络合物(M = Cu(II),Co(II),Ni(II),Mn(II),Fe(III)或UO 2(VI); m和n = 0-1; x = 1-3)在作为去质子剂的Li(OH)存在下获得。结合的性质和配合物的立体化学已经从元素分析,红外,电子光谱,磁化率和电导率测量中推导出来。对于所有配合物,除了Cu(II)和UO2(VI)以外,均建议采用八面体几何形状。 Cu(II)配合物具有向四面体变形的正方形平面几何形状,而UO2(VI)配合物则显示出其有利的七配位。测试了席夫碱配体> HL 及其复合物对一种菌株革兰氏+ ve细菌(金黄色葡萄球菌),革兰氏-ve细菌(大肠杆菌)和真菌(白色念珠菌)的影响。制备的金属配合物表现出比母体配体更高的抗菌活性,并讨论了它们的生物效能。

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