一个基于Wells-Dawson型多金属氧酸盐的有机-无机化合物的合成与结构  

Synthesis and crystal structure of a two-dimensional organic-inorganic hybrid based on Wells-Dawson polyoxoanion

作　　者：胥旋[1] 吴传德[1] 

机构地区：[1]浙江大学化学系,杭州310027

出　　处：《中国科技论文在线》2011年第12期893-895,900,共4页

基　　金：高等学校博士学科点专项科研基金资助项目(20090101110017)

摘　　要：以夹心结构Wells-Dawson型化合物[Na16P4W30Cu4(H2O)2O112](简写为{Cu4P4W30})作为无机构筑块,有机含氮化合物吡嗪(简写为Pz)和过渡金属Co(II)离子分别作为桥连配体和节点金属,在常压水溶液中合成了一个结构新颖的有机-无机杂化化合物(H3O)4[{Co6(H2O)22(Pz)2}{Cu3Co(H2O)2P4W30O112}].19H2O,并通过X-射线单晶衍射测定该化合物的晶体结构。标题化合物属三斜晶系,P-1空间群,晶胞参数:a=1.4323(2)nm,b=1.4539(3)nm,c=2.0794(2)nm,V=4.126(2)nm3,Z=1,F(000)=4126,R1=0.1230,wR2=0.2597。结构分析表明,Wells-Dawson型杂多酸阴离子作为一个八齿配体,在a、b方向上分别通过桥氧和[Co2(Pz)(H2O)8]4+配阳离子、Co(II)向外延伸连接成为一个具有二维网络状结构的有机-无机聚合物。此外,还通过元素分析、IR和TG等手段对化合物进行了相应的性质表征。An organic-inorganic hybrid, （H3O）4[{Co6（H2O）22（Pz）2} {Cu3Co（H2O）2P4W30O112}]-19H2O has been synthesized using the Wells-Dawson sandwich-type polyoxometalate [Na16P4W30Cu4（H2O）2O112] （abbreviated as {Cu4P4W30}） as inorganic building blocks, the N-donor organic ligand of pyrazine （abbreviated as Pz） as bridging ligand and cobalt cations as joint metal. X-ray signal crystal diffraction, IR spectrum, Elemental analysis and TG analysis were used to characterized the structure of {Cu4P4W30}. The results showed that the title compound crystalizes in the tricilinic P-1 space group with a=1.4323（2） nm, b=l.4539（3）nm, c=2.0794（2） nm, V= 4.126 （2） nm^3, Z=l, F（000）=4126, R1=0.1230, wR2=0.2597. X-Ray structure analysis indicated that the compound is constructed into a two-dimensional network, which the inorganic unit {Cu4P4W30} acts as an octadenate ligand coordianate to four [C02（Pz）（H2O）8]^（4＋） cations and four cobalt cations in different directions.

关 键 词：有机-无机杂化材料 多金属氧酸盐 Wells-Dawson结构 晶体结构 

分 类 号：O621.3[理学—有机化学]