Crystal structures, antibacterial activity and thermal decomposition kinetics of lanthanide complexes with 4-chloro-2-methoxybenzoic acid and 1,10-phenanthroline  

作　　者：Ying-Ying Zhang Shu-Xia Ren Jian-Jun Zhang Ning Ren Shu-Ping Wang 

机构地区：[1]Testing and Analysis Center, Hebei Normal University [2]Material Science and Engineering School, Shijiazhuang Tiedao University [3]College of Chemistry and Material Science, Hebei Normal University [4]Department of Chemistry, Handan College

出　　处：《Chinese Science Bulletin》2014年第27期3398-3405,共8页

基　　金：supported by the National Natural Science Foundation of China (21073053, 21173067 and 20773034);the Natural Science Foundation of Hebei Province (B2012205022, B2011205037)

摘　　要：A series of lanthanide complexes [Ln(4-Cl-2-MOBA)3phen]2(Ln=Sm(1), Nd(2), Ho(3), Eu(4), Dy(5), and Tb(6); 4-Cl-2-MOBA=4-chloro-2-methoxybenzoate, phen=1,10-phenanthroline) were synthesized and characterized. The single-crystal X-ray diffraction demonstrates that 1–3 are isomorphous, which present dimeric structures with four 4-Cl-2-MOBA anions function as bridging ligands. Complexes 1 and 4–6 display their characteristic luminescence emission bands of central Ln3?ions. The heat capacities, the thermodynamic functions and the thermogravimetry–Fourier transform infrared spectra of gaseous products of complexes 1–6 were investigated.Their non-isothermal kinetics of the second decomposition stage was studied by the integral isoconversional non-linear method and Stark method. Furthermore, 1–6 exhibited excellent antibacterial activity against Candida albicans,Escherichia coli and Staphylococcus aureu.A series of lanthanide complexes [Ln（4-Cl-2- MOBA）3phen]2 （Ln=Sm （1）, Nd （2）, Ho （3）, Eu （4）, Dy （5）, and Tb （6）; 4-Cl-2-MOBA=4-chloro-2-methoxybenzoate, phen=1,10-phenanthroline） were synthesized and characterized. The single-crystal X-ray diffraction demonstrates that 1-3 are isomorphous, which present dimeric structures with four 4-Cl-2-MOBA anions function as bridging ligands. Complexes 1 and 4-6 display their characteristic luminescence emission bands of central Ln^3＋ ions. The heat capacities, the thermodynamic functions and the thermogravimetry-Fourier transform infrared spectra of gaseous products of complexes 1-6 were investigated. Their non-isothermal kinetics of the second decomposition stage was studied by the integral isoconversional non-linear method and Stark method. Furthermore, 1-6 exhibited excellent antibacterial activity against Candida albicans, Escherichia coli and Staphylococcus aureu.

关 键 词：热分解动力学 甲氧基苯甲酸 稀土配合物 晶体结构 抗菌活性 邻菲咯啉 镧系元素 金黄色葡萄球菌 

分 类 号：O641.4[理学—物理化学]