钛取代杂多酸盐甘氨酸超分子化合物的合成及热分解动力学研究  

Synthesis and non-isothermal kinetics of titanium substituted heteropolytungstates and glyine supermolecular compounds

作　　者：马荣华[1] 马虹钰[1] 

机构地区：[1]齐齐哈尔大学化学与化学工程学院,黑龙江齐齐哈尔161006

出　　处：《化学试剂》2012年第1期23-26,30,共5页Chemical Reagents

基　　金：黑龙江省教育厅基金资助项目(11531411);黑龙江省自然科学基金资助项目(B2007-15)

摘　　要：用室温固相法合成了Keggin结构单取代杂多硅钨酸盐甘氨酸超分子化合物α-K4(HGly)3[SiW11Ti(H2O)O39].4H2O,用IR、UV、TG-DTA、X-射线粉末衍射等方法对其进行了表征。结果表明:甘氨酸阳离子与杂多阴离子主要靠静电作用结合,超分子化合物中杂多阴离子仍保持Keggin结构。同时,采用TG-DTA技术研究了标题化合物在氮气气氛中的热分解机理及非等温动力学,用Coats-Redfern的积分法和Achar的微商法对配合物的非等温动力学数据进行分析,得出了热分解反应的机理函数、动力学参数以及分解反应的活化能E和lnA。Supermolecular compounds of glycine monosuhsti- tuted heteropolytungstates with Keggin structure α-K4 （ HGly） 3 [ SiW11 Ti （ H20 ） 039 ] · 4H2O were synthesized by solid phase reaction in room temperature. The structure was characterized by IR, UV, TG-DTA,X-ray diffraction. The results indicate that glycine combines the electrostatic effect with het- eropolytungstates. The heteropoly anion still remains its Keggin structure in supermolecular compounds. The non-isother- malkinetic data were analyzed with the used Coats-Redfern integral method and Achar differential method. The mechanism function, kinetic parameters, apparent activation energy E and pre-exponential factor InA of the thermal decomposition were obtained.

关 键 词：杂多钨酸盐 甘氨酸 超分子化合物 热分解动力学 

分 类 号：O614.5[理学—无机化学]