α-SiW_(11)Al/四丁基铵盐电荷转移配合物的合成及热分解动力学研究

Synthesis and thermal decomposition reaction kinetics of α-SiW_(11)Al and tetrabutylammonium charge-transfer complex

用室温固相法合成了铝取代杂多酸盐四丁基铵盐电荷转移配合物α-TBA5[SiW11O39Al(H2O)].xH2O,用元素分析、IR、TG-DTG、XRD等方法对其进行了表征。结果显示,该化合物仍保持杂多阴离子的Keggin结构的基本特征。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-Brindley-sharp-Wendworth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。

Charge-Transfer Complex α-TBA5[SiW11O39Al-（H2O）]·xH2O were synthesized by solid phase reaction in room temprature and was characterized by elementary analysis IR,TG-DTA,X-ray diffraction.The results indicate that heteropoly anion still remains Keggin structure in supermolecular compounds.The non-isothermal kinetic were investigated with the Used Coats-Redfern integral method,and Achar-Brindley-Sharp-Wendworth differential method.The mechanism function,kinetic parameters,apparent activation energy E and pre-exponential factor lnA of the thermal decomposition were obtained.