Absorption- and Pressure-induced Structural Transition Exhibiting V-shaped Density Change in Imidazolium-based Ionic Liquid + CO<sub>2</sub> System
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The density of ionic liquid (IL) + CO<sub>2</sub> systems was measured by X-ray absorption method and excess molar volume was evaluated to investigate the volumetric behavior under a CO<sub>2</sub> absorption process up to 20 MPa. A V-shaped density plot was observed, and three types of expanded/compressed trends were classified based on the excess molar volume of the IL. The volumetric behavior of the IL strongly depends on the CO<sub>2</sub> amount absorbed in the IL’s cavities.
- Chemistry Letters
Chemistry Letters 44(7), 937-939, 2015
The Chemical Society of Japan