稀土元素钼砷杂多配合物的合成与性质研究  

Syntheses of Rare Earth Molybdoarsenate Heteropoly Complexes and Their Properties

作　　者：王恩波[1] 胡长文[1] 周延修 刘景福[1] 

机构地区：[1]东北师范大学化学系

出　　处：《高等学校化学学报》1990年第4期340-344,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金

摘　　要：本文报道了通式为(NH_4)_(17)[RE(As_2Mo_(17)O_(61))_2]·nH_2O的13种杂多配合物(RE=Y,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Yb)的合成条件。研究了它们的IR、UV、CV、极谱和TG-DTA等性质。在水溶液中该配位反应为三步双电子还原机理,其杂多配合物结构为四方反棱柱型。In this paper, the preparation of heteropoly compounds (NH4)17(RE(As2Mo17O61)2) · nH2O (RE=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb, Y) is reported. The physical and chemical characters of the new preparative heteropoly compounds were studied by using UV, IR, CV, TG-DTA polarography. It was determined that the condition under which the heteropoly anion RE (As2Mo17O61)217- could stably exist in solution is pH=2. 8-4. 0 at room temperature. The redox properties of rare earth molybdoarsenate complexes in solution and their thermal stabilities were also studied. It was deduced that heteropoly compounds (NH4)17[RE(As2Mo17O61)2] · nH2O and K16[Ce(a2-P2W17O61)2] · 50H2O have the same structure.

关 键 词：稀土 钼砷配合物 双电子还原 合成 

分 类 号：O614.33[理学—无机化学]