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| 三缺位Keggin多阴离子[α-A-AsW_9O_（34）]~（9-）到Dawson多阴离子[α-As_2W_（18）O_（62）]~（6-）的结构转变（英文） | |
| 引用本文： | 陈利娟,刘云,马鹏涛,赵俊伟.三缺位Keggin多阴离子[α-A-AsW_9O_（34）]~（9-）到Dawson多阴离子[α-As_2W_（18）O_（62）]~（6-）的结构转变（英文）[J].化学研究,2009,20(4):38-43. |
| 作者姓名： | 陈利娟 刘云 马鹏涛 赵俊伟 |
| 作者单位： | 1. 河南大学,基础实验教学中心,河南,开封,475004;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 2. 河南大学,基础实验教学中心,河南,开封,475004 3. 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 |
| 摘 要： | 以Na8α-A-HAsW9O34].11H2O,CuCl2.2H2O和乙二胺（en）为原料,在两步水热条件下反应合成了一种有机-无机复合的饱和Dawson砷钨酸盐H2en]3α-As2W18O62].0.5en.9H2O（1）,并对其进行了元素分析、红外光谱和单晶X射线衍射表征。在化合物1的形成过程中,首次观察到三缺位Keggin多阴离子α-A-AsW9O34]9-到饱和Dawson多阴离子α-As2W18O62]6-的结构转变,这为饱和Dawson多阴离子可以看作由两个三缺位Keggin多阴离子通过共用六个氧原子聚合而成的事实提供了一个有力的实验证据。而且,多金属氧酸盐化学中其它一些不同多阴离子间的转变也被归纳。 |
| 关 键 词： | 结构转变 砷钨酸盐 多金属氧酸盐 多阴离子 Keggin结构 Dawson结构 |
Structural Transformation from Trivacant Keggin Polyoxoanion [α-A-AsW9 O34]9- to Dawson Polyoxoanion [α-As2 W18 O62]6- |
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| CHEN Li-juan,LIU Yun,MA Peng-tao,ZHAO Jun-wei.Structural Transformation from Trivacant Keggin Polyoxoanion [α-A-AsW9 O34]9- to Dawson Polyoxoanion [α-As2 W18 O62]6-[J].Chemical Research,2009,20(4):38-43. | |
| Authors: | CHEN Li-juan LIU Yun MA Peng-tao ZHAO Jun-wei |
| Institution: | CHEN Li-juan, LIU Yun, MA Peng-tao, ZHAO Jun-wei (1. Basic Experiment Teaching Center, Henan University, Kaifeng 475004, Henan, China; 2. Institute of Molecldar and Crystal Engineering, College of Chemistry and Chemical Engineering He,urn University, Kaifeng 475004, Henan, China) |
| Abstract: | An organic-inorganic complicated saturated Dawson arsenotungstate H2en]3α-As2 W18 O62] ·0.5en · 9H2O (1) has been synthesized from a mixture of Na8α-A-HAsW9O34] · 11H2O, CuCl2 · 2H2O and ethylenediamine (en) by means of a two-step hydrothermal approach, and characterized by using elemental analysis, IR spectrometry and single-crystal X-ray diffraction.The structural transformation of the trivacant Keggin α-A-AsW9O34]9- polyoxoanion to the saturated Dawson α-As2W18O62]6- polyoxoanion has been firstly observed in the formation of 1, which provides a powerful experimental proof that saturated Dawson polyoxoanions can be viewed as the fusion of two trivacant Keggin polyoxoanions by sharing six oxygen atoms.Moreover, some structural transformations between different polyoxoanions in polyoxometalate chemistry are also summarized. |
| Keywords: | structural transformation arsenotungstate polyoxometalate polyoxoanion Keggin structure Dawson structure |
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