Syntheses,Structures and Properties of Lanthanide Coordination Polymers Constructed from Mixed Acid

• 作者: 吕琼 孙长艳 常志东 张慧燕 李文军 郑向军
• 来源期刊: 结构化学
• 学科: 化学
• 关键词: 配位聚合物 拓扑结构 合成 混合酸 X-射线衍射分析 稀土 构造 属性
• 年，卷（期）: 2012,（1）
• 页码范围: 27-32
• 页数: 6页
• 分类号: O614.121|TP393.1
• 语种: 英文

摘要

Two new coordination polymers,[Ln（oba）（ox）0.5（H2O）2]n（Ln = Ho（1）,Eu（2）;H2oba = 4,4？-oxybis（benzoic acid）,H2ox = oxalic acid） have been synthesized under hydrothermal conditions.According to single-crystal X-ray diffraction analyses,complex 1 crystallizes in the monoclinic system,space group P21/c with a = 13.783（2）,b =10.0120（15）,c = 12.1974（18） ,β = 105.217（2）°,V = 1624.2（4） 3,C15H12O9Ho,Mr = 501.18,Z = 4,Dc = 2.050 g/cm3,F（000） = 964,μ = 4.919 mm-1,λ（MoKα） = 0.71073 ？,GOOF = 1.124,the final R = 0.0239 and wR = 0.0570 for 3310 independent reflections with Rint = 0.0298.Complexes 2 and 1 are isostructural.Oba and ox ligands bridge the Ln（III） ions into 2D layers with（4,4） topology,which are further interlinked into a 3D supramolecular network by hydrogen bonds.TG curves of the two complexes are studied to examine their thermal stabilities.Additionally,complex 2 shows red fluorescence in the solid state at room temperature.