Synthesis and properties of switchable polarity ionic liquids based on organic superbases and fluoroalcohols
Synthesis and properties of switchable polarity ionic liquids based on organic superbases and fluoroalcohols
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DOI：
10.1016/j.ces.2013.12.040
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发表时间：
2014-04
影响因子：
4.7
通讯作者：
Zhichang Liu;Pengcheng Hu;X. Meng;Rui Zhang;Hui Yue;Chunming Xu;Yufeng Hu
中科院分区：
文献类型：
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作者：
Zhichang Liu;Pengcheng Hu;X. Meng;Rui Zhang;Hui Yue;Chunming Xu;Yufeng Hu
以有机脒/氟代醇和胍/氟代醇为原料，通过质子转移反应合成了低湿敏性极性可切换离子液体。该离子液体具有较低的极性，在温和条件下经CO2处理后可转化为高极性的氟烷基碳酸酯离子液体。它们的高极性状态也可以很容易地恢复到低极性状态的CO2与加热去除。由低极性到高极性的变化所导致的结构和物理性质的变化通过NMR光谱、FTIR分光光度法、UV-可见光谱以及电导率和溶解性测量来证实。这些SWIL在溶质分离和溶剂回收方面具有潜在的应用前景。
Switchable polarity ionic liquids (SWILs) with low moisture sensitivity were successfully synthesized from organic amidine/fluoroalcohol and guanidine/fluoroalcohol via proton transfer reaction. The ionic liquids showed low polarity and could be converted into high-polarity fluoroalkylcarbonate ILs upon the treatment with CO2under mild conditions. Their high polarity state could also readily be reverted to the low polarity state by the removal of CO2with heating. Changes in the structures and physical properties resulting from the change from low polarity to high polarity were confirmed by NMR spectroscopy, FTIR spectrophotometry, UV–vis spectroscopy, and conductivity and miscibility measurements. These SWILs have potential applications in solute separation and solvent recovery.