β_2-Keggin结构稀土元素钨砷杂多配合物的合成与表征  

Synthesis and Characterization of β_2-Keggin Structure Heteropolytungstoarsenates Containing Rare Earth Elements

作　　者：张海华[1] 徐学勤[1] 周百斌[1] 

机构地区：[1]哈尔滨师范大学化学系,黑龙江哈尔滨150080

出　　处：《化学与粘合》2005年第6期325-327,共3页Chemistry and Adhesion

基　　金：国家自然科学基金(No:20371014);黑龙江省教育厅科研项目(No:10531070);哈尔滨市后备带头人基金(No:2002AFXXJ050)的资助

摘　　要：采用直接法合成了8种稀土元素取代的钨砷杂多配合物,通过ICP和TG曲线确定了其化学式为K11[Ln(AsW11O39)2]·xH2O,采用IR、UV、XRD、183WNMR等方法对配合物结构进行了表征,结果表明合成配合物为β2-Keggin结构.TG-DTA分析对合成配合物的热稳定性考察表明,配合物在515～545℃分解.8 kinds of heteropolytungstoarsenste.nate complexes containing rare earth elements have been prepared directly, the general molecular formulas of the complexes, K11 [Ln（AsW11O39）2] ·xH2O （Ln= La^3＋ ,Ce^3＋ ,Pr^3＋ , Nd^3＋ ,Sm^3＋ ,Gd^3＋ ,Yb^3＋ ,Y^3＋ ）, Ln（AsW11 ）2 for short, are determined by ICP and TG.The results of IR.UV,XRD、^183WNMR showed that complexes were β2 - Keg, gin structures.Their thermal stabilities measured by TG - DTA showed that the complexes were decomposed in the range of 515 - 545℃.

关 键 词：β2-Keggin结构 钨砷杂多配合物 稀土元素 

分 类 号：TQ426.91[化学工程]