双金属配合物PrBi(edta)(NO_3)_2·6.5H_2O的合成、表征与热分解  

Synthesis,Characterization and Thermal Decomposition of Complex PrBi(edta)(NO_3)_2·6.5H_2O

作　　者：蒋琪英[1] 邓洪权[1] 沈娟[1] 钟国清[1] 

机构地区：[1]西南科技大学化学系,绵阳621010

出　　处：《应用化学》2008年第8期983-985,共3页Chinese Journal of Applied Chemistry

基　　金：四川省科技厅资助项目(05JY029-113);西南科技大学引进人才基金;青年基金(ZK043129,ZK053012)资助项目

摘　　要：采用NH4Bi(edta)·2H2O和硝酸镨为原料,二者按摩尔比为1∶1在水溶液中合成了含铋(Ⅲ)和镨(Ⅲ)的双金属配合物PrBi(edta)(NO3)2·6.5H2O,产率为45%,该配合物在空气中稳定,不吸湿。用元素分析、FT-IR、XRD和TG-DSC测试技术对产物进行了组成和结构表征。结果表明,配合物属于单斜晶系,相应晶胞参数为a=0.9885nm,b=2.3472nm,c=1.3756nm,β=93.375°。通过红外光谱和热分析共同研究了热分解过程,配合物在热分解时,经过脱水、配体热分解、金属盐分解,最后在600℃失重恒定,残余物为BiPrO3。A novel bimetallic complex PrBi （edta） （ NO3 ） 2 · 6. 5 H2O was synthesized by the reaction of NH4 Bi（edta） · 2H2O with praseodymium nitrate at a stoichiometric ratio of 1：1 in distilled water. The yield was about 45%. The complex is stable at room temperature and nonhydroscopic. The composition and structure of the complex was characterized by elemental analyses, FT-IR, TG-DSC and XRD. The crystal of the complex belongs to monoclinic system with cell parameters： a =0. 988 5 nm, b =2. 347 2 nm, c = 1. 375 6 nm, β = 93.375 °. IR spectrum and thermal analysis indicate that the thermal decomposition of the complex proceeded in several stages, the dehydration, pyrolysis of ligand, and finally the decomposition of the metallic ：salt, and the residue is an oxide with formula BiPrO3 at 600 ℃.

关 键 词：双金属配合物 铋(Ⅲ) 镨(Ⅲ) 热分解 

分 类 号：O614.5[理学—无机化学] O641.4[理学—化学]