Supramolecular hybrids of polytungstates and their adsorption properties for methylene blue
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- 作者：Yunping Liu ; Ran Zheng ; Zhangang Han ; hanzg116@126.com" class="auth_mail" title="E-mail the corresponding author ; Kaining Gong ; Xueli He ; Xueliang Zhai
- 关键词：Polyoxometalate ; Hybrid ; Adsorption&ndash ; desorption ; Methylene blue
- 刊名：Journal of Solid State Chemistry
- 出版年：2015
- 出版时间：November 2015
- 年：2015
- 卷：231
- 期：Complete
- 页码：169-174
- 全文大小：2696 K
文摘
Two supramolecular hybrids [Ni(mbpy)3]2[V2W4O19]·6H2O (1) and [Ni(mbpy)3]2[VW12O40] (2) (mbpy=4,4使-dimethyl-2,2使-bipyridyl) had been synthesized and characterized. Single crystal X-ray diffraction analyses revealed that the anionic moieties in two hybrids belong to typical Lindqvist and 伪-Keggin-type structures, respectively. The counter ion [Ni(mbpy)3]2+ units were anchored to the polyanions via non-covalent intermolecular interactions. These supramolecular hybrids exhibit reversible adsorption–desorption performance for organic dye methylene blue (MB). Hybrid 2 shows a fast adsorption behavior towards MB and a relatively high value can be reached within 5 min in dark. Both 1 and 2 are structurally stable and can be easily separated from the reaction system for reuse.