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

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

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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 β-cyclodextrin-ionic liquid systems; experimental solid-liquid equilibrium; activity coefficients at infinite dilution; intermolecular interactions
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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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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