Synthesis, characterization and antimicrobial activity of 3,5-di-tert-butylsalicylaldehyde-S-methylthiosemicarbazones and their Ni(II) complexes
作者:Baki Türkkan、Bahtiyar Sarıboğa、Nezaket Sarıboğa
DOI:10.1007/s11243-011-9518-7
日期:2011.9
Ni(II) complexes were prepared by the reactions of 3,5-di-tert-butylsalicylaldehyde-S-methylisothiosemicarbazone (L) with salicylaldehyde or 2-hydroxy-1-naphthaldehyde in the presence of NiCl2·6H2O. The complexes and starting material L were characterized by physic-chemical analysis and spectroscopic techniques such as 1HNMR, 13CNMR, IR and UV–VIS. Antimicrobial activity studies of L and the two complexes standards strains of bacteria (Staphylococcus aureus, methicillin-resistant Staphylococcus aureus (MRSA), Bacillus cereus, Enterococcus faecalis, Streptococcus pneumoniae, Listeria monocytogenes, Escherichia coli, Salmonella typhi and Candida albicans) and 22 clinically isolated microorganisms, including multidrug resistant pathogenic microorganisms, were carried out. The free thiosemicarbazone L showed a significant inhibition of the growth all of Gram-positive bacteria tested.
在 NiCl2-6H2O 的存在下,通过 3,5-二叔丁基水杨醛-S-甲基异硫代氨基脲(L)与水杨醛或 2-羟基-1-萘甲醛的反应制备了 Ni(II) 复合物。通过物理化学分析和光谱技术(如 1HNMR、13CNMR、IR 和 UV-VIS)对复合物和起始材料 L 进行了表征。L 和两种复合物的抗菌活性研究标准菌株(金黄色葡萄球菌、耐甲氧西林金黄色葡萄球菌 (MRSA)、蜡样芽孢杆菌、粪肠球菌、肺炎链球菌、痢疾杆菌)、对标准菌、蜡样芽孢杆菌、粪肠球菌、肺炎链球菌、李斯特菌、大肠杆菌、伤寒沙门氏菌和白色念珠菌以及 22 种临床分离微生物(包括耐多药病原微生物)进行了研究。结果表明,游离硫代氨基甲酸 L 能显著抑制所有革兰氏阳性细菌的生长。