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由Bi(Hcydta).5H2O和Nd(NO3).6H2O按1︰1的物质的量比,在水溶液中合成了含Bi(III)-Nd(III)的异核配位聚合物{[(NO3)Nd(H2O)4(μ3-cydta)Bi(μ-ONO2)].2.5H2O}n.用元素分析、红外光谱、热重-差热和X射线单晶衍射等手段对标题配合物的组成和结构进行了表征.该配合物属三斜晶系,空间群P1,晶胞参数:a=0.9235(3)nm,b=1.0902(4)nm,c=1.4253(5)nm,α=71.840(4)°,β=86.877(4)°,γ=76.991(4)°,Z=2,Mr=936.65,V=1.3284(8)nm3,Dc=2.342g.cm-3,μ=8.646mm-1,F(000)=900,最终偏离因子R1=0.0406,wR2=0.1124.在该配合物中,铋(III)与配体cydta4-的4O2N和1个硝酸根中1个O原子以及邻位分子的硝酸根形成8配位的畸变双帽三棱柱.钕(III)与4个水分子的O,1个硝酸根中2个O以及来自3个不同配体cydta4-的桥联羧基O结合,形成9配位的三帽三棱柱构型.羧酸根在Bi—Nd和硝酸根在Bi—Bi间的桥联作用,使得整个配合物分子连接成无限二维框架结构.热分析以及分解产物的红外光谱表明配合物热分解经历脱水、配体热分解、硝酸盐转变成氧化物等多步连续分解过程,最后在625℃失重恒定.
The heteronuclear coordination polymer {[(NO3 (superscript 3 +)]) with Bi (III) -Nd (III) was synthesized from aqueous solution by the ratio of 1: 1 by Bi (Hcydta) .5H2O and Nd (NO3) The composition of the title complex was characterized by elemental analysis, IR, TG-DTA and single crystal X-ray diffraction (A) = 0.9235 (3) nm, b = 1.0902 (4) nm, c = 1.4253 (5) nm, α = 71.840 (4) °, β = 86.877 (4) °, γ = 76.991 (4) °, Z = 2, Mr = 936.65, V = 1.3284 (8) nm3, Dc = 2.342g.cm-3, μ = 8.646mm -1, F (000) = 900, the final deviation factor R1 = 0.0406, wR2 = 0.1124. In this complex, bismuth (III) and the ligand cydta4- 4O2N and 1 nitrate in a O atom and the adjacent The nitrate of the molecule forms a distorted double-capped triangular prism with a coordination of 8. The O of neodymium (III) with 4 water molecules, 2 O of 1 nitrate, and the bridging carboxyl O from 3 different ligands cydta4- To form a triple-capped three-cap triangular prismatic configuration.Carboxylates bridge the Bi-Nd and nitrate groups in Bi-Bi, which links the entire complex molecules into an infinite two-dimensional framework structure. Thermal analysis and decomposition Red of the product Spectra show complex thermal decomposition undergoes dehydration, thermal decomposition of ligands, nitrate is converted into a continuous multi-step oxide decomposition process, the final constant weight loss at 625 ℃.