N-乙酰-DL-丙氨酸、咪唑与稀土铕固体配合物的合成、表征、荧光性质及热分解动力学  

Synthesis,Characterization,Fluorescence Property and Thermal Decomposition Kinetics of Complex of Rare Earth Eu(Ⅲ) with Acetylalanine and Imidazole

作　　者：王艳[1] 聂光华[1] 但悠梦[1] 杨一心[2] 

机构地区：[1]湖北民族学院化学与环境工程学院,恩施445000 [2]西北大学化学系,西安710069

出　　处：《应用化学》2006年第11期1253-1258,共6页Chinese Journal of Applied Chemistry

基　　金：陕西省教育厅专项项目(04JK1433);湖北民族学院科研项目(2005LB003)

摘　　要：合成了稀土铕与N-乙酰-DL-丙氨酸(C5H9NO3,Ac-A la)及咪唑(C3H4N2,Im)的固体新配合物。通过元素分析和化学分析确定其化学组成为Eu(C5H8NO3)2(C3H5N2)2C l3.3H2O,并通过FTIR、UV1、H NMR、13C NMR和X射线粉末衍射等测试技术对配合物进行了表征;根据TG-DTG曲线研究了配合物的热分解过程;利用Achar微分法及Coats-Redfern积分法对非等温动力学数据进行分析,推断出脱水阶段的动力学方程为dα/dt=A/β.e-E/RT{(1-α)[-ln(1-α)]-1/2}。发光性能测试表明,该配合物具有很好的荧光性能。A new solid complex of rare earth Eu（Ⅲ） with N-acetyl-DL-alanine（C5H9NO3, Ac-Ala） and imidazole（ C3H4 N2, Im） was synthesized and characterized by means of chemical and elemental analyses, FTIR, UV, ^1 H NMR, ^13C NMR and XRD. The composition of the complex was confirmed to be Eu （ C5 H8 NO3 ） 2 （ C3 H5 N2 ） 2 Cl3·3 H2O. The thermal decomposition of the complex was studied v/a TG-DTG curve. By means of the Achar method and the Coats-Redfern method, the non-isothermal kinetic data of the dehydration stage of the complex was analyzed. The most probable reaction mechanism was suggested by comparing the kinetic parameters. The kinetic equation for the dehydration stage could be expressed as dα/dt =A/β·e^-E/RT{ （ 1 - α） [ - ln （ 1 - α） ]^-1/2}. Luminescence measurement showed that the complex emits fluorescence.

关 键 词：铕配合物 N-乙酰-DL-丙氨酸 咪唑 荧光性质 热分解 非等温动力学 

分 类 号：O614.3[理学—无机化学]