Int. J. Mol. Sci. 2013, 14(8), 16638-16655; doi:10.3390/ijms140816638

Physico-Chemical Properties and Phase Behavior of the Ionic Liquid-β-Cyclodextrin Complexes

1 LCP-A2MC, EA 4164, Université de Lorraine, 1, bd Arago-57078 METZ, Cedex 3, France 2 Institut National Polytechnique De Lorraine, Nancy Université, 2 la Forêt de Haye BP3, Vandceuvre-lès-Nancy Cedex 54501, France 3 Department of Physical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warsaw 00-664, Poland
* Author to whom correspondence should be addressed.
Received: 18 June 2013; in revised form: 30 July 2013 / Accepted: 31 July 2013 / Published: 13 August 2013
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Abstract: The solubility of β-cyclodextrin (β-CD) in ionic liquids (ILs) and the activity coefficients at infinite dilution () of more than 20 solutes (alkanes, aromatic hydrocarbons, alcohols) were measured in four chosen ionic liquids, their mixtures with β-CD, and in the β-CD at high temperatures from 338 to 398 K using the inverse gas chromatography. The intermolecular interactions, inclusion complexes and the possible increasing of the solubility of β-CD in water using the IL are presented. The solubility of β-CD in ten chosen hydrophobic ILs at the temperature T = 423 K was detected. The solid-liquid phase diagrams (SLE) of {IL (1) + β-CD (2)} binary systems at the high mole fraction of the IL were measured for three systems (1-ethyl-3-methylimidazolium chloride, [EMIM][Cl], 1-ethyl-3-methylimidazolium bromide, [EMIM][Br]; and for 1-butyl-3-methylimidazolium chloride, [BMIM][Cl]). The eutectic points were determined at the high IL concentration for all binary systems. The intermolecular interaction and the possibility of inclusion complexes of the IL and/or solvents with β-CD were discussed. The infrared spectroscopy, IR was used for the description of the intermolecular interactions in the (β-CD + IL) systems. It was shown via the activity coefficients at infinite dilution results that the inclusion complexes are dependent on the temperature. The addition of β-CD to the IL does not improve the selectivity of the separation of the aliphatics from aromatics.
Keywords: β-cyclodextrin-ionic liquid systems; experimental solid-liquid equilibrium; activity coefficients at infinite dilution; intermolecular interactions

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MDPI and ACS Style

Rogalski, M.; Modaressi, A.; Magri, P.; Mutelet, F.; Grydziuszko, A.; Wlazło, M.; Domańska, U. Physico-Chemical Properties and Phase Behavior of the Ionic Liquid-β-Cyclodextrin Complexes. Int. J. Mol. Sci. 2013, 14, 16638-16655.

AMA Style

Rogalski M, Modaressi A, Magri P, Mutelet F, Grydziuszko A, Wlazło M, Domańska U. Physico-Chemical Properties and Phase Behavior of the Ionic Liquid-β-Cyclodextrin Complexes. International Journal of Molecular Sciences. 2013; 14(8):16638-16655.

Chicago/Turabian Style

Rogalski, Marek; Modaressi, Ali; Magri, Pierre; Mutelet, Fabrice; Grydziuszko, Aleksandra; Wlazło, Michał; Domańska, Urszula. 2013. "Physico-Chemical Properties and Phase Behavior of the Ionic Liquid-β-Cyclodextrin Complexes." Int. J. Mol. Sci. 14, no. 8: 16638-16655.

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