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℃.
出处
《分子科学学报》
CAS
CSCD
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)
关键词
钨铬杂多配合物
碱土金属
热稳定性
tungsten-chromium heteropoly complexes
alkaline-earth metals
thermal stability