磷酸二丁酯稀土络合物的合成与红外光谱研究  

Syntheses and Infrared Spectra of Rare Earth Complexes With Dibutyl Phosphate

作　　者：李来明[1] 马爱增[2] 曾广赋[1] 刘向越 李涵[1] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022 [2]吉林农业大学土化系

出　　处：《分析化学》1991年第9期987-992,共6页Chinese Journal of Analytical Chemistry

摘　　要：本文用稀土氯化物与磷酸三丁酯反应制备了标题络合物Ln(DBP)3(Ln=La,Eu,Yb),研究了络合物的热分解机理。由残渣的红外光谱确认其热分解最终产物为稀土偏磷酸盐。测定了络合物的红外光谱,对其1300cm^(-1)以下的主要吸收谱带进行了归属。红外光谱表明,标题络合物与Sm(DMP)_3等磷酸二甲酯稀土络合物具有相同的配位形式和结构类型。每个稀土离子通过双“O—P—O”桥与邻近的三个稀土离子相连接,形成“双桥二十四元环”的多聚网络结构。Ln—O键基本上是离子键。The solid complexes of La, Eu and Yb with dibutyl phosphate(DBP)were synthesized by the reaction of tributyl phosphate(TBP)with related rare earth chlorides. The mechanism of thermo-decomposition of the complexes has been studied. The thermo-decomposition residues of the complexes were verified by their infrared spectra to be the rare earth metaphosphates. The infrared spectra of the complexes were measured and principal infrared absorption bands were assigned from 1300 to 100 cm^(-1). The result showed that the polymeric title complexes are extremely similar to the single crystal of the complex of samarium with dimethyl phosphate Sm(DMP)_3 single crystal in the spectral properties of Ln-O bond and PO_2 group. Thus these complexes may have the same molecular configuration as Sm(DMP)_3 crystal, i.e. the DBP anions coordinate with lanthanide ions through double O-P-O bridges to form a special network of rings-linking-rings, each of which consists of twenty-four atoms. The Ln-O bond of Ln(DBP)_3 is principally ionic.

关 键 词：磷酸二丁酯 稀土 络合物 红外光谱 

分 类 号：O614.33[理学—无机化学]