配合物[Eu(4-MOBA)_3(terpy)(H_2O)]_2的合成、表征、热分解机理及性质(英文)  

Synthesis, Characterization,Thermal Decomposition Mechanism and Properties of the [Eu(4-MOBA)_3(terpy)(H_2O)]_2 Complex

作　　者：霍建霞 宋素伟 靳成伟 任宁[4] 耿丽娜[2] 张建军[1,2] 

机构地区：[1]河北师范大学分析测试中心,石家庄050024 [2]河北师范大学化学与材料科学学院,石家庄050024 [3]中石油京唐液化天然气有限公司,河北唐山063210 [4]邯郸学院化学化工与材料学院,河北邯郸056005

出　　处：《物理化学学报》2016年第4期901-906,共6页Acta Physico-Chimica Sinica

基　　金：supported by the National Natural Science Foundation of China(31201305,21473049);Natural Science Foundation of Hebei Province,China(B2016205207)~~

摘　　要：合成了一个新的配合物[Eu(4-MOBA)_3(terpy)(H_2O)]_2(4-MOBA:4-甲氧基苯甲酸根,terpy:2,2′:6′,2′′-三联吡啶)。采用傅里叶变换红外(FTIR)光谱、元素分析和X射线粉末衍射(XRD)技术对标题配合物进行了表征,用X射线单晶衍射仪测定了配合物的晶体结构,在配合物中每个Eu^(3+)离子与一个三联吡啶分子、一个水分子和三个羧酸分子结合,配位数为9,羧酸基团的配位模式包含三种:双齿螯合,桥连双齿,单齿。根据热重-差示扫描量热/傅里叶变换红外(TG-DSC/FTIR)联用技术,研究了配合物的热分解机理。配合物的发射光谱显示出Eu^(3+)离子的特征荧光发射,表明三联吡啶和4-甲氧基苯甲酸在该体系中可作为敏化集团。另外,文中还讨论了配合物对白色念珠菌和大肠杆菌的抑菌活性。A new complex [Eu（4- MOBA）3（terpy）（H2O）]2（4- MOBA： 4- methoxybenzoate, terpy： 2,2′：6′,2′′-terpyridine） was synthesized. The complex was characterized using Fourier transform infrared（FTIR）spectroscopy, elemental analysis, and powder X- ray diffraction（XRD）. The structure of the complex was determined using single-crystal XRD. In the complex, each Eu3＋ion is nine coordinated to one terpy molecule,one water molecule and three carboxylate groups. The carboxylate groups are bonded to the Eu3＋ion in three modes： bidentate, bridging bidentate, and monodentate. Based on thermogravimetry- differential scanning calorimetry/Fourier transform infrared（TG-DSC/FTIR） measurements, we determined the thermal decomposition mechanism. The emission spectra of the complex exhibited characteristic luminescence, suggesting that terpy and 4-methoxybenzoic acid can act as sensitizing chromophores in this system. Also, bacteriostatic activities for the complex to Candida albicans and Escherichia coli are discussed.

关 键 词：镧系配合物 晶体结构 热分解机理 荧光 2 2′′ 2′′-三联吡啶 抑菌活性 

分 类 号：O641.4[理学—物理化学]