Ionic Liquids in Polyethylene Glycol Aqueous Solutions: Salting-in and Salting-out Effects

被引：0
|
作者：
Zoran P. Visak
José N. Canongia Lopes
Luis Paulo N. Rebelo
机构：
[1] Universidade Nova de Lisboa,Instituto de Tecnologia Química e Biológica
[2] Instituto Superior Técnico,Centro de Química Estrutural
来源：
Monatshefte für Chemie - Chemical Monthly | 2007年 / 138卷
关键词：
Keywords. Ionic Liquids; Salting-out effects; Aqueous ; solutions; Kosmotropic and chaotropic salts.;
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摘要：
Changes of the fluid phase behaviour of polyethylene glycol (PEG) aqueous solutions – viz. critical solution temperature shifts at atmospheric pressure – were produced by the addition of different ionic liquids, namely 1-ethyl-3-methylimidazolium ethyl sulfate and 1-alkyl-3-methylimidazolium chloride (alkyl = ethyl to decyl). The addition of ionic liquids with long alkyl chains improves the solubility of PEG in water (salting-in effect), whereas the impact of short-chain ionic liquids is usually the contrary (salting-out effect). The results are interpreted taking into account the kosmotropic (water-structuring) or chaotropic (water-structure-breaking) nature of ionic liquids, as compared to other inorganic salts.
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页码：1153 / 1157
页数：4
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