[Gd2(BDC)3(H2O)2]n和[Ho2(BDC)3(H2O)2]n的合成和结构

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.

Synthesis and structures of [Gd2 (BDC)3 (H2O)2]n and [Ho2 (BDC)3 (H2O)2]n

Insoluble coordination polymers (formula: Ln2 (BDC)3(H2O) 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:C24H16O14Gd2 ,M= 842. 9, monoclinic, space group: P21/n, a = 1. 341 nm, b= 1. 446 nm, c =data for Ho2(BDC)3 (H2O)2]n: C24 H16O14 Ho2, 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 nm3, Z=4, Mo-Kα, μ=5. 264Ln ions dimmers are interlinked together by BDC ligands with three different carboxylate groups,form intricate 2-D interconnecting tunnels with two aqua ligands inside.