配合物[Dy(p-MBA)_3phen]_2的合成、表征和非等温动力学  

Preparation,Characterization and Non-Isothermal Decomposition Kinetics of [Dy(p-MBA)_3phen]_2

作　　者：张大海[1] 宿素玲[2] 任宁[1] 

机构地区：[1]邯郸学院化学系邯郸 [2]石家庄外经贸职业学院工程系,石家庄050061

出　　处：《应用化学》2010年第11期1339-1343,共5页Chinese Journal of Applied Chemistry

基　　金：河北省科学技术研究与发展计划项目(09215135);邯郸市科学技术与发展计划项目(0821130083-3);河北大学河北省化学生物重点实验室开放基金资助项目(CB2009003);邯郸学院硕士启动基金资助项目(2007008)

摘　　要：采用水溶液合成法,合成了新型配合物[Dy(p-MBA)3phen]2(p-MBA=对甲基苯甲酸;phen=1,10-邻菲啰啉)。通过元素分析、红外光谱、摩尔电导和热分析(TG-DTG)等测试技术对配合物进行了表征。研究了Dy(Ⅲ)配合物在静态空气气氛下的第一步热分解反应的非等温动力学。通过用Popescu法和非线性等转化率积分法(NL-INT)的处理和计算,得到此步热分解反应的动力学方程为:dα/dT=15.55×1012/β·exp(-19825.60/T)3(1-α)2/3,平均活化能为164.83kJ/mol,指前因子为15.55×1012min-1。A ternary complex with the formula of [Dy（p-MBA） 3 phen]2（p-MBA = p-methylbenzoic acid;phen = 1,10-phenathroline） was synthesized via the solution method.Elemental analysis,infrared spectra,molar conductance,thermogravimetry and derivative thermogravimetry（TG-DTG） were used to characterize the title complex.The results show the Dy（Ⅲ） ion was coordinated to the oxygen atoms of p-methylbenzoic acid,and the nitrogen atoms of the 1,10-phenanthroline,and the title complex has a good thermal stability.Nonisothermal kinetics of the first thermal decomposition stage of Dy（Ⅲ） complex was studied in the static air atmosphere.Through the Popescu method and the nonlinear integral isoconversional（NL-INT） method,the kinetic equation was expressed as dα/dT = 15.55 × 1012/βexp（-19825.60/T） 3（1-α） 2/3,and the average activation energy and the pre-exponential factor were 164.83 kJ/mol and 15.55 × 1012 min-1,respectively.The thermal stability of a series of complexes was compared.The results may provide some valuable materials for the choice of functional materials of rare-earth complexes.

关 键 词：镝配合物 对甲基苯甲酸 邻菲啰啉 非等温动力学 

分 类 号：O614.3[理学—无机化学]