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Benzene Solubility in Ionic Liquids: Working Toward an Understanding of Liquid Clathrate Formation

机译:苯在离子液体中的溶解度:努力理解液体包合物的形成

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The solubility of benzene in 15 imidazolium, pyrrolidinium, pyridinium, and piperidinium ionic liquids has been determined; the resulting, benzene-saturated ionic liquid solutions, also known as liquid clathrates, were examined with H-1 and F-19 nuclear magnetic resonance spectroscopy to try and understand the molecular interactions that control liquid clathrate formation. The results suggest that benzene interacts primarily with the cation of the ionic liquid, and that liquid clathrate formation (and benzene solubility) is controlled by the strength of the cation-anion interactions, that is, the stronger the cation-anion interaction, the lower the benzene solubility. Other factors that were determined to be important in the final amount of benzene in any given liquid clathrate phase included attractive interactions between the anion and benzene (when significant), and larger steric or free volume demands of the ions, both of which lead to greater benzene solubility.
机译:测定了苯在15种咪唑鎓,吡咯烷鎓,吡啶鎓和哌啶离子液体中的溶解度;用H-1和F-19核磁共振波谱检查了所得的苯饱和离子液体溶液(也称为液体包合物),以试图了解控制液体包合物形成的分子相互作用。结果表明,苯主要与离子液体的阳离子发生相互作用,而液体包合物的形成(以及苯的溶解度)受阳离子-阴离子相互作用的强度控制,即,阳离子-阴离子相互作用越强,则越低苯的溶解度。在任何给定的液态包合物相中,确定对最终苯的最终含量很重要的其他因素包括阴离子与苯之间的吸引力相互作用(当显着时),以及更大的离子空间或自由体积需求,这两者都会导致更大的苯的溶解度。

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