一种三维配位聚合物的水热合成和晶体结构  

Hydrothermal Synthesis and Crystal Structure of a 3D Coordination Compound

作　　者：王鹏[1] 王崇臣[1] 

机构地区：[1]北京建筑工程学院环境与能源工程学院,北京100044

出　　处：《广州化工》2009年第5期79-81,共3页GuangZhou Chemical Industry

基　　金：北京市属市管高等学校人才强教计划项目(BJE10016200611);北京建筑工程学院科学基金(100700502)

摘　　要：通过水热合成法获得了La2(H2O)4(PDC)2(XO).2H2O,X射线-单晶衍射结果表明,标题化合物属于单斜晶系,空间群为P2(1)/n,晶胞参数为a=0.77512(16)nm,b=0.9975(2)nm,c=1.5142(3)nm,β=98.50(3)o和Z=4。La(Ⅲ)呈现四方反棱柱体的配位模式,分别和2个来自同一个草酸配体的氧原子、4个来自4个PDC配体的氧原子以及2个来自2个配位水分子的氧原子配位。标题化合物的三维结构是通过草酸配体和水分子配体将二维[La(PDC)]+阳离子层连接而成。该三维网络结构中沿着a-轴形成孔道,标题化合物中的自由水分子占据了这些孔道。该化合物在250℃下保持热稳定。La2 （ H2 O） 4 （ PDC ） 2 （XO）·2H2 O was hydrothermally synthesized, and single crystal X - ray diffraction revealed that the title compound crystallizes in monoclinic, space group P2（ 1 ）/n with a =0. 77512（16） nm, b =0. 9975 （2） nm, c = 1. 5142（3） nm, β=98.50（3）° and Z =4. The coordination mode of La（Ⅲ） can be described as a distorted aquare antiprism, which was completed by two oxygen atoms from one oxalate, four oxygen atoms from four different PDC ligands, and two oxygen atoms from two water molecules. The three - dimensional framework of the title compound was composed of 2 -D layers of [La（PDC）]^＋ linked by oxalate ligands and water ligands. The result of 3 -D structure showed open channels along a-axis, which were occupied by free water molecules.

关 键 词：镧 吡啶-3 5-二羧酸 草酸 水热合成 晶体结构 热性能 

分 类 号：O614.812[理学—无机化学] TB383[理学—化学]