[4,4′-bpyH_2]_5H_2[α-P_2W_(18)O_(62)]_2·4H_2O的合成与结构表征  

Synthesis and Structural Characterization of [4,4'-bpyH_2]_5H_2[α-P_2W_(18)O_(62)]_2·4H_2O

作　　者：赵俊伟[1] 陈利娟[1] 王敬平[1] 

机构地区：[1]河南大学化学化工学院,分子与晶体工程研究所,河南开封475004

出　　处：《化学研究》2008年第4期14-17,共4页Chemical Research

摘　　要：利用水热方法合成了一种基于双Dawson多阴离子和质子化的4,4′-联吡啶阳离子构筑的化合物[4,4′-bpyH2]5H2[α-P2W18O62]2·4H2O,并经IR光谱、元素分析、热重分析和X射线单晶衍射等测试技术进行了表征.标题化合物属于三斜晶系,P墿空间群,晶胞参数:a=1.35373(5),b=2.24256(13),c=2.73282(11)nm,α=79.890(13),β=77.568(8),γ=80.349(11)°,V=7.9029(6)nm3,Z=2,Dc=4.031g/cm3,GOOF=1.049,R1=0.0674,wR2=0.1434.结构分析结果表明,标题化合物分子由5个质子化的4,4′-联吡啶阳离子、2个H+离子、2个饱和Dawson结构多阴离子[P2W18O62]6-和4个结晶水分子组成.A compound [ 4, 4＇-bpyH2] s H2[ α-P2W18O62]2·4H2O constructed from double Dawson polyanions and protonated 4, 4＇-bipyridine cations was synthesized by the hydrothermal method and characterized by IR spectra, elemental analysis, thermogravimetric analysis and X-ray single-crystal diffraction. The title compound crystallizes in triclinic space group Pi with a = 1. 353 73 （5）, b = 2.24256（13）, c=2.73282（11） nm, α=79.890（13）, β=77.568（8）, γ=80.349（11）°, V= 7.9029（6） nm^3, Z=2, Dc =4.031 g/cm^3, GOOF=1.049, R1 =0.0674, wR2 =0.143 4. Structural analysis indicates that the molecule of the title compound consists of 5 diprotonated 4, 4＇-bipyridine cations, 2 protons, 2 saturated Dawson polyanions [ P2W18O62]^6- and 4 crystal water molecules.

关 键 词：多金属氧酸盐 水热合成 4 4'-联吡啶 DAWSON结构 

分 类 号：O614[理学—无机化学]