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作 者:刘朗[1] 丰俊东[1] 沈应中[1] 王晶[1] 邱亮[1]
机构地区:[1]南京航空航天大学材料科学与技术学院,南京211106
出 处:《化学通报》2017年第4期378-384,共7页Chemistry
基 金:江苏省自然科学基金项目(SBK2014041829);江苏高校优势学科建设工程资助项目(PAPD);南京航空航天大学研究生创新基地(实验室)开放基金项目(kfjj201444)资助
摘 要:以亚乙基双胍、吡啶及吡啶衍生物为配体合成了[AgEn(BigH)_2]_2(SO_4)_3·7H_2O(3)、[Ag(Py)_2(N_2)_2](OH)_2(4)和[Ag(2-Apy)_3(OH)](HSO_4)·H_2O(5)三种较稳定的高价银配合物。产物结构经红外光谱、元素分析和XPS进行表征。通过最小抑菌浓度(MIC)和生长抑制曲线来检测配合物的抗菌能力,并对配合物进行光稳定测试。抗菌实验结果显示,所有的配合物在0.5μg/mL浓度下就开始对测试菌产生抑制作用,对大肠杆菌的MIC分别为10、5和5μg/mL,对金黄色葡萄球菌的MIC为40、20和20μg/mL。配合物对大肠杆菌的抗菌活性高于对金黄色葡萄球菌。Three fairly stable high-valence silver complexes [AgEn(BigH)2]2(SO4)3 ·7H20 (3), [Ag(Py)2 ( N2 )2 ] (OH) 2 (4) and [Ag (2 - Apy) 3 (OH) ] ( HSO4 ) · H20 ( $ ) have been synthesized with ethylenebisbiguanide, pyridine and pyridine derivative as ligands. The products were characterized by IR, elemental analysis and X-ray photoelectron spectroscopy. The growth-inhibitory curves and the minimal inhibitory concentration (MIC) were applied to evaluate the antibacterial ability of complexes, and the photostability of complexes was detected. The results showed that all the complexes begin to inhabit the growth of test bacteria at very low concentration of 0. 5 μg/mL, and the MIC values for E. coil are 10, 5, and 5 μg/mL respectively, the MIC values for S. aureus are 40, 20, and 20μg/mL respectively, indicating the synthesized high-valence silver complexes possess an excellent antibacterial activity. Besides, all the complexes have better antibacterial activity to E. coli than S. aureus.
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