1,2,3,4-丁烷四羧酸镧系络合物的制备及热重和红外光谱研究  

Synthesis, Thermal and Spectral Investigation of Lanthanide(Ⅲ) Complexes with 1,2,3,4-butanetetracarboxylic Acid

作　　者：张连惠[1] 张成[1] 姜恒[1] 宫红[1] 苏婷婷[1] 

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《稀土》2005年第3期5-8,46,共5页Chinese Rare Earths

基　　金：辽宁省教育厅科研项目攀登计划资助(20051016)

摘　　要：1,2,3,4-丁烷四羧酸镧系(Ln=La,Ce,Pr,Nd,Yb)络合物为结晶固体,其通式:Ln4(C8H6O8)3·nH2O,Ln=Ce、Pr、Nd,n=8;Ln=La,n=7;Ln=Yb,n=11。在加热过程中,它们首先失去络合物中所含的水,再进一步加热,开始分一步(Ce,Pr)或两步(La,Yb,Nd,中间产物为Ln2O2CO3)热分解,最终生成镧系金属氧化物。红外光谱研究表明Ln4(C8H6O8)3·nH2O中羧酸盐基团为双齿配位螯合体。Lanthanide(Ⅲ) (Ln=La, Ce, Pr, Nd, Yb) complexes with 1,2,3,4-butanetetracarboxylic acid were prepared as crystalline solids, their general formula Ln_4(C_8H_6O_8)_3·nH_2O, where n=8 for Ce, Pr and Nd, n=7; for La,n=11 for Yb. During heating the hydrated complexes, they lose all crystallization water. Further heating the anhydrated complexes result the decompositon of the complex to corresponding oxides(Ce, Pr) or with intermediate formation of oxocarbonates Ln_2O_2CO_3(La, Nd, Yb). The IR spectra of the prepared complexes suggest that the carboxylate group is bidentate chelating.

关 键 词：络合物 1 2 3 4-丁烷四羧酸 镧系金属 热重分析 红外光谱 

分 类 号：O614.33[理学—无机化学] O657.33[理学—化学]