K_3H_3[As_2W_(21)O_(69)(H_2O)]·19H_2O的合成及晶体结构(英文)  

Synthesis and crystal structure of K_3H_3[As_2W_(21)O_(69)(H_2O)]·19H_2O

作　　者：张芳[1] 马杏[1] 张静[1] 陈利娟[1] 

机构地区：[1]河南大学化学化工学院,河南省多酸化学重点实验室,河南开封475004

出　　处：《化学研究》2014年第3期242-246,共5页Chemical Research

基　　金：Supported by the Natural Science Foundation of China(21101055,21301049,U1304208);the Natural Science Foundation of Henan Province(122300410106);the Foundation of Education Department of Henan Province(2010B150006);the Students Innovative Pilot Plan of Henan University(2012,2013)

摘　　要：利用二缺位K14[As2W19O67]·nH2O前驱体在酸性条件下的结构转变得到了饱和的砷钨酸盐K3H3[As2W21O69(H2O)]·19H2O(1),借助傅立叶变换红外光谱和X射线单晶衍射对其结构进行了表征.结果表明,化合物1的多阴离子骨架由两个相同的三缺位[α-AsW9O33]9-片段通过三个W=O基团连接而成.值得提及的是,在化合物1的阴离子骨架中心空腔中存在一个游离的水分子.Plenary polyoxotungstate K3 H3 [As2 W21 O69 （H2 O）]＆#183;19H2 O （1） was obtained through the structural transformation of divacant precursor K14 [As2 W19 O67 ]＆#183;nH2 O in acidic aqueous so-lution .The structure of as-obtained plenary polyoxotungstate was characterized by means of Fourier transform infrared spectrometry and single-crystal X-ray diffraction .Results indicate that the polyoxoanionic skeleton [As2 W21 O69 （H2 O）]6- of compound 1 is constructed from two identical trivacant [α-AsW9 O33 ]9- fragments through three W = O groups .Moreover ,what is worth mentioning is that there exists a free water molecule in the central cavity of the polyoxoanion of 1 .

关 键 词：多金属氧酸盐 砷钨氧酸盐 合成 晶体结构 

分 类 号：O614.3[理学—无机化学]