In present investigation nanocrystalline mixed ligand complexes were synthesized using 8-hydroxyquinoline, salicylaldoxime with metals like Cu (II), Ni (II) and Co (II). The metal: ligand ratio was found to be 1:1:1. These complexes were characterized using electronic spectra, FTIR spectra, elemental analysis, magnetic susceptibility, thermogravimetric analysis, conductivity measurement, powder X-ray diffraction and Scanning Electron Microscopy with electron dispersive spectroscopic methods. The electronic spectra of complexes suggest that they have square planer geometries. In FTIR analysis characteristic bands of ν (M-N) and ν (M-O).The Co (II) and Cu (II) complexes are paramagnetic in nature and these had square planer geometry. While Ni (II) complexes are diamagnetic nature and having square planer geometry. The thermal analysis of complexes was studied in an attempt to assign intermediate compounds. Low molar conductance values indicate non – electrolytic nature of the complexes. The Powder X-ray diffraction study shows formation of nanocrystalline phase as well as the grain size of complexes is less than 10 nm. The EDS study is shows good agreement for formation of mixed ligand metal complexes . Complex: [C16H12CuN2O2], [C14H12N2NiO4 ], [C16H12NiN2O2] and [C16H12CoN2O2] had antimicrobial activity against four bacteria tested. Bacteria were resistant to other five complexes.
本研究使用
8-羟基喹啉、
水杨醛肟与 Cu (II)、Ni (II) 和 Co (II) 等
金属合成了纳米晶混合
配体复合物。
金属与
配体的比例为 1:1:1。使用电子光谱、傅立叶变换红外光谱、元素分析、磁感应强度、热重分析、电导率测量、粉末 X 射线衍射和扫描电子显微镜以及电子色散光谱方法对这些配合物进行了表征。 复合物的电子能谱表明它们具有正方形平面几何结构。在傅立叶变换红外光谱分析中,ν(M-N)和ν(M-O)为特征谱带。
钴(II)和
铜(II)配合物具有顺磁性,它们的几何形状为方形平面。
钴(II)和
铜(II)络合物具有顺磁性,其几何形状为方形平面,而
镍(II)络合物具有二磁性,其几何形状为方形平面。对配合物的热分析进行了研究,试图找出中间化合物。低摩尔电导值表明络合物具有非电解性质。粉末 X 射线衍射研究表明,络合物形成了纳米晶相,晶粒尺寸小于 10 纳米。EDS 研究表明,混合
配体金属配合物的形成与 EDS 研究结果十分吻合。复合物:[C16H12CuN2O2]、[C14H12N2NiO4 ]、[C16H12NiN2O2]和[C16H12CoN2O2]对测试的四种细菌具有抗菌活性。细菌对其他五种复合物具有抗药性。