碱土金属钨铬杂多配合物的合成、表征及热稳定性研究  

Synthesis and characterization study on thermal stability of alkaline-earth metals with tungsten-chromium heteropoly acid

作　　者：王珩[1] 周百斌[1] 

机构地区：[1]哈尔滨师范大学化学系

出　　处：《分子科学学报》2006年第4期226-230,共5页Journal of Molecular Science

基　　金：国家自然科学基金资助项目(20371014);黑龙江教育厅科研基金资助项目(10531070);哈尔滨市学科后备带头人基金资助项目(2002AFXXJ050)

摘　　要：用直接法合成了以Cr为中心原子的碱土金属和W的三元杂多配合物,经ICP和TG曲线确定其化学式为K7[CrA(H2O)W11O39].xH2O(A=Mg2+,Ca2+,Sr2+和Ba2+),采用IR,UV,XRD,XPS和183W NMR等手段对配合物结构进行了表征,确认所合成的配合物为-αKeggin结构.借助TG-DTA详细讨论了配合物的热稳定性,得出合成配合物的热稳定温度为450℃左右.The alkaline-earth metals tribasic heteropoly compounds with Cr as the central atom had been synthesized directly and characterized by IR,UV,XRD,XPS and ^183W NMR. By means of ICP and TG,the molecular formulas were confirmed as K7[CrA（H2O）W11O39]· xH2O（A=Mg^2＋, Ca^2＋, Sr^2＋, Ba^2＋）. It is confirmed that the complex is Keggin structure. Furthermore, their thermal stabilities were discussed by dint of TG-DTA, it shows that thermolysis temperature range of the obtained complexes is around 450℃.

关 键 词：钨铬杂多配合物 碱土金属 热稳定性 

分 类 号：O614[理学—无机化学]