3D Bi(Ⅲ)-La(Ⅲ)异金属配位聚合物的合成、结构和热稳定性  

Synthesis,structure and thermal stability of a new 3D heterobimetallic Bi(Ⅲ)-La(Ⅲ) polymer complex

作　　者：邓洪权[1] 蒋琪英[1] 钟国清[1] 胡文远[1] 

机构地区：[1]西南科技大学材料学院化学系,四川绵阳621010

出　　处：《化学研究与应用》2010年第1期99-104,共6页Chemical Research and Application

基　　金：四川省科技厅应用基础研究基金(05JY029-113)资助;西南科技大学青年基金(08ZX3101)资助

摘　　要：A new Bismuth(Ⅲ)-Lanthanum(Ⅲ) heterobimetallic polymer complex,{[(H2O)5La(μ4-edta)Bi(NO3)2]·3H2O}n(edta=diaminetetraacecarboxylate),has been hydrothermally synthesized and characterized by elemental analysis,FT-IR,and X-ray diffraction single crystal structure analysis.It crystallizes in the monoclinic system,with space group P2(1)/n,a=1.27395(5)nm,b=0.82608(4) nm,c=2.38819(11) nm,β=104.9000(10)°,V=2.42879(19) nm3,Z=4,Dc=2.438 g·cm-3,μ=9.077mm-1,F(000)=1678,R1=0.0343,wR2=0.0906.In this complex,Bi atom is coordinated by four carboxyl O atoms from a single edta4-anion.La atom is bonded to four O atoms from four bridging carboxyl O atoms belonging to four different edta4-anions and five O atoms from five H2O molecules.Bi atoms and La atoms are linked by bridged edta4-anions,resulting into a novel infinite 3D network structure.TG-DSC and IR indicate that thermal decomposition proceeds in several stages,dehydration,pyrolysis of ligand,and finally decomposition of salt,and the residue is composite oxide based on δ-Bi2O3 at the temperature of 600℃.A new Bismuth（ Ⅲ ）-Lanthanum（ Ⅲ ） heterobimetallic polymer complex, { [ （H2 O）5 L3（μ4-edta）Bi（ NO3 ）2 ]·3H2O}, （edta = diaminetetraacecarboxylate）,has been hydrothermally synthesized and characterized by elemental analysis,FT-IR, and Xray diffraction single crystal structure analysis. It crystallizes in the monoclinic system, with space group P2 （ 1 ）/n, a = 1. 27395 （5）nm,b=0.82608（4） nm,c=2.38819（11） nm,β=104.9000（10）°,V=2.42879（19） nm^3,Z=4,Dc =2.438 g·cm^-3, μ = 9. 077mm^-1 , F（000） = 1678, R1 = 0. 0343, wR2 = 0.0906. In this complex, Bi atom is coordinated by four carboxyl O atoms from a single edta^4- anion. La atom is bonded to four O atoms from four bridging carboxyl O atoms belonging to four different edta^4- anions and five O atoms from five H2O molecules. Bi atoms and La atoms are linked by bridged edta^4- anions ,resulting into a novel infinite 3D network strueture. TG-DSC and IR indicate that thermal decomposition proceeds in several stages, dehydration, pyrolysis of ligand, and finally decomposition of salt, and the residue is composite oxide based on δ-Bi2 O3 at the temperature of 600℃.

关 键 词：杂金属配合物 铋(Ⅲ) 镧(Ⅲ) 氨基多羧酸 结构 合成 

分 类 号：O614[理学—无机化学]