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硅钨酸盐复合物[Zn(2,2-′bipy)_3]_(1.5)[SiW_(12)O_(40)Zn(2,2-′bipy)_2(OH)]·0.25H_2O的合成、结构及表征(英文)

Synthesis,Structure and Characterization of a Silicotungstate Anion-Supported Organic-Inorganic Hybrid Complex [Zn(2,2-′bipy)_3]_(1.5)[SiW_(12)O_(40)Zn(2,2-′bipy)_2(OH)]·0.25H_2O
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摘要 通过水热合成方法,合成了一种新型的硅钨酸盐担载的有机无机复合物[Zn(2,2-′bipy)3]1.5[SiW12O40Zn(2,2-′bipy)2(OH)].0.25H2O,并对其进行了元素分析、红外光谱、热分析及X-射线单晶衍射等表征.结构分析表明,标题化合物结构单元中含有1个[SiW12O40Zn(2,2-′bipy)2(OH)]3-杂多阴离子,1.5个[Zn(2,2-′bipy)3]2+阳离子和0.25个结晶水分子.在[SiW12O40Zn(2,2-′bipy)2(OH)]3-杂多阴离子中,Keggin阴离子[SiW12O40]4-通过一个端氧原子与[Zn(2,2-′bipy)2(OH)]+共价相连.TG-DTA热分析曲线表明多阴离子的骨架在618℃分解. A new Keggin-type silicotungstate anion-supported organic-inorganic hybrid transition metal complex [Zn （2,2＇-bipy） 3 ]1.5 [SiW12O40Zn（2,2＇-bipy）2 （OH） ]· 0.25H2O （2,2＇-bipy = 2,2＇-bipyridine） has been synthesized by hydrothermal method and characterized by elemental analysis, IR spectrum, TG-DTA and single crystal X-ray diffraction. The analysis indicates that each structure unit of the title compound consists of a [SiW12O40Zn（2,2＇-bipy）2 （OH） ]^3- heteropolyanion, one and a half [Zn （2,2＇-bipy） 3 ]^2＋ cations, and a quarter of crystal water molecules. The [Zn （2,2＇-bipy） 2 （OH） ]^＋ unit is covalently bonded to one Keggin polyoxoanion [SiW12O40]^4- through a terminal oxygen atom in the [SiW12O40Zn（2,2＇-bipy）2 （OH） ] ^3- heteropolyanion. The TG-DTA analysis exhibits that the anion framework collapses at 618 ℃.
作者 周朵 李继利 牛红雨 王伟 王敬平
机构地区 河南大学化学化工学院分子与晶体工程研究所
出处 《河南大学学报（自然科学版）》 CAS 北大核心 2008年第6期575-579,共5页 Journal of Henan University:Natural Science
基金 Programfor newcentury excellent talent in university of Henan province(2005 HANCET-02) the natural science foundation of Henan province(0611020200) the natural science key foundation of Henan university(06ZDZR010)
关键词 多金属氧酸盐 水热合成 KEGGIN结构 硅钨酸盐 polyoxometalates hydrothermal synthesis keggin structure silicotungstate
分类号 O641.121 [理学—物理化学]
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参考文献15

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河南大学学报（自然科学版）
2008年 第6期

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