摘要
用1,3-间苯二甲酸(BDC)和Ln2O3(Ln=Gd,Ho),通过水热法,加入少量3,5-二甲基吡啶,合成了具有二维结构的配位聚合物[Ln2(BDC)3(H2O)2]n.通过X射线单晶衍射的方法得到两种化合物的晶体数据.[Gd2(BDC)3(H2O)2]n的晶体数据:C24H16O14Gd2,M=842.9,单斜晶系,空间群:P21/n,a=1.341 nm,b=1.446 nm,c=1.343 nm,β=104.17°,V=2.528 nm3,Z=4,Mo-Kα,μ=5.264 cm-1,Dc=2.12 g.cm-3.[Ho2(BDC)3(H2O)2]n的晶体数据:C24H16O14Ho2,M=860.2,单斜晶系,空间群:P21/c,a=1.059 nm,b=1.420 nm,c=1.710 nm,β=97.90°,V=2.548 nm3,Z=4,Mo-Kα,μ=5.264 cm-1,Dc=2.12 g.cm-3.这两种化合物有相似的二维结构.Ln离子通过三种不同的BDC配体方式互相连接,组成了复杂的二维隧道,同时配位水分子在隧道中.
Insoluble coordination polymers (formula: [Ln2(BDC)3 ( HeO)2]n ) with 2-D structures were obtained from the reaction of 1,3-benzenedicarboxylic acid (BDC) with Ln2O3(where Ln= Gd, Ho) under hydrothermal conditions in the presence of 3,5-lutidine. The two compounds were characterized by single crystal X-ray diffraction. Crystal data for [Gd2(BDC)3 (H2O)2]n: C24H16O14Gde ,M= 842. 9, monoclinic, space group: P21/n,a = 1. 341 nm,b= 1. 446 nm,c= 1. 343 nm,β= 104.17°,V=2. 528 nm^3 ,Z=4,Mo-Kα,μ=5. 264 cm^-1 ,Dc=2. 12 g · cm^-3, Crystal data for [Ho2 (BDC)3 (BDC)3(H2O)2]n:C24 H16O14Ho2, M=860. 2, monoclinic, space group: P21/c,a= 1.059 nm,b=14.20 nm,c=17.10 nm,β=97. 90°,V=2.548 nm^2, Z=4, Mo-Kα, μ=5. 264 cm^-1 D,=2.12 g · cm^-3. The two types of polymers have similar two-dimensional structures. Ln ions dimmers are interlinked together by BDC ligands with three different carboxylate groups, form intricate 2-D interconnecting tunnels with two aqua ligands inside.
基金
SupportedbyNationalNaturalScienceFoundationofChina(10174069)
关键词
配位聚合物
镧系
间苯二甲酸
coordination polymers
lanthanides
carboxylate groups(BDC)