这项研究引入了一对新合成的银络合物[Ag 2(HGly)2 ] n(NO 3)2n(1)和[Ag(Nam)2 ] NO 3 ·H 2 O(2)(Gly-甘氨酸, Nam –烟酰胺),已通过相关方法在固态下进行了制备和表征(元素,光谱,热和结构分析),并通过1 H NMR测量验证了其在溶液中的稳定性。此外,在二元体系Ag-Gly的情况下,根据pH通过电位计观察到合适的反应条件。X射线分析证实了复合物1中的纯银相互作用Ag1-Ag2距离为2.8018(6)Å。抗菌测试表明,配合物1比配合物2具有更高的生长抑制作用。而且,两种复合物对细菌(金黄色葡萄球菌和大肠杆菌)的效力均优于(或相似)于市售的Ag(I)磺胺嘧啶AgSD(例如,用于地拉嗪乳膏中)的效力。使用电子吸收,荧光和圆二色性分光光度法研究了Ag(I)复合物与小牛胸腺DNA的结合。从线性淬火图获得的Stern-Volmer淬火常数估计为2.01×10
The structural investigation of the ferroelectric phase transition in glycine silver nitrate has revealed that the transition at T-C = 218 K is due to the displacement of the Ag+ ions from the plane made by the carboxyl oxygens of glycine zwitterions coordinated to it. Since the transition takes place between two ordered structures the thermal anomaly at T-C is very weak, the transition enthalpy and transition entropy were found to be Delta H = 6.6 J/mol and the transition entropy AS = 0.03 J K-1 mol(-1) respectively. These crystals are held together by a network of hydrogen bonds. In order to Study these interactions the Raman spectrum of GSN was recorded and discussed in the light of ferroelectricity in glycine complexes in general. (C) 2007 Elsevier Ltd. All rights reserved.