Synthesis, characterization of copper(II), cobalt(II), nickel(II), zinc(II) and cadmium(II) complexes of [7-hydroxy-4-methyl-8-coumarinyl]glycine and a comparitive study of their microbial activities
作者:Kalagouda B. Gudasi、Manjula S. Patil、Ramesh S. Vadavi
DOI:10.1016/j.ejmech.2008.01.028
日期:2008.11
[7-hydroxy-4-methyl-8-coumarinyl]glycine [MCGH(2)], has been prepared by the condensation of 7-hydroxy-4-methyl-coumarin with glycine and formaldehyde. Its conformational changes on complexation with transition metal ions [copper(II), cobalt(II), nickel(II), zinc(II) and cadmium(II)] have been studied on the basis of elemental analysis, conductivity measurements, spectral (infrared, (1)H NMR, electronic, EPR)
一种新的曼尼希碱,[7-羟基-4-甲基-8-香豆基]甘氨酸[MCGH(2)],是通过7-羟基-4-甲基香豆素与甘氨酸和甲醛的缩合制备的。在元素分析,电导率测量,光谱分析(光谱法)的基础上研究了其与过渡金属离子[铜(II),钴(II),镍(II),锌(II)和镉(II)]络合时的构象变化。红外,(1)H NMR,电子,EPR),磁和热重研究。所有配合物的红外光谱研究表明,配体已通过-NH和两个羟基进行配位。配合物的电导数据表明它们是非电解质。研究了配体及其金属配合物的荧光性质,得出的结论是,配体MCGH(2)可能是在室温下通过荧光法测定锌(II)和镉(II)的潜在候选物。研究了所有化合物对革兰氏阴性(大肠杆菌)和革兰氏阳性(环鞭毛芽孢杆菌)细菌和真菌,黑曲霉和白色念珠菌的抗菌活性。观察到金属离子的配位对配体的微生物活性具有显着影响。所有金属配合物均显示出比游离配体更高的抗菌作用。黑曲霉和白色