Evidence for lower critical solution behavior in ionic liquid solutions

J. Lachwa; J. Szydlowski; V. Najdanovic-Visak; L.P.N. Rebelo; K.R. Seddon; M.N. Da Ponte; J.M.S.S. Esperança; H.J.R. Guedes

doi:10.1021/ja0510257

Evidence for lower critical solution behavior in ionic liquid solutions

J. Lachwa, J. Szydlowski, V. Najdanovic-Visak, L.P.N. Rebelo, K.R. Seddon, M.N. Da Ponte, J.M.S.S. Esperança, H.J.R. Guedes

Research output: Contribution to journal › Article › peer-review

Abstract

Lower critical solution temperatures (LCST)-type of phase diagrams, including the presence of closed loops, have been encountered for the first time in binary and quasi-binary liquid solutions of ionic liquids. Furthermore, the results constitute the first experimental support for the existence of a theoretically postulated, but never encountered, special kind of type VII phase diagram. Two distinct mechanisms are involved in the appearance of demixing upon temperature increase. These findings underlie the presence of specific, oriented interactions between the ionic liquid, 1-alkyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}amide, [Cnmim][NTf2], and trichloromethane, as well as aggregation phenomena.

Original language	English
Pages (from-to)	6542-6543
Journal	Journal of the American Chemical Society
Volume	127
Issue number	18
DOIs	https://doi.org/10.1021/ja0510257
Publication status	Published - 13 Apr 2005

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title = "Evidence for lower critical solution behavior in ionic liquid solutions",

abstract = "Lower critical solution temperatures (LCST)-type of phase diagrams, including the presence of closed loops, have been encountered for the first time in binary and quasi-binary liquid solutions of ionic liquids. Furthermore, the results constitute the first experimental support for the existence of a theoretically postulated, but never encountered, special kind of type VII phase diagram. Two distinct mechanisms are involved in the appearance of demixing upon temperature increase. These findings underlie the presence of specific, oriented interactions between the ionic liquid, 1-alkyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}amide, [Cnmim][NTf2], and trichloromethane, as well as aggregation phenomena.",

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T1 - Evidence for lower critical solution behavior in ionic liquid solutions

AU - Lachwa, J.

AU - Szydlowski, J.

AU - Najdanovic-Visak, V.

AU - Rebelo, L.P.N.

AU - Seddon, K.R.

AU - Da Ponte, M.N.

AU - Esperança, J.M.S.S.

AU - Guedes, H.J.R.

PY - 2005/4/13

Y1 - 2005/4/13

N2 - Lower critical solution temperatures (LCST)-type of phase diagrams, including the presence of closed loops, have been encountered for the first time in binary and quasi-binary liquid solutions of ionic liquids. Furthermore, the results constitute the first experimental support for the existence of a theoretically postulated, but never encountered, special kind of type VII phase diagram. Two distinct mechanisms are involved in the appearance of demixing upon temperature increase. These findings underlie the presence of specific, oriented interactions between the ionic liquid, 1-alkyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}amide, [Cnmim][NTf2], and trichloromethane, as well as aggregation phenomena.

AB - Lower critical solution temperatures (LCST)-type of phase diagrams, including the presence of closed loops, have been encountered for the first time in binary and quasi-binary liquid solutions of ionic liquids. Furthermore, the results constitute the first experimental support for the existence of a theoretically postulated, but never encountered, special kind of type VII phase diagram. Two distinct mechanisms are involved in the appearance of demixing upon temperature increase. These findings underlie the presence of specific, oriented interactions between the ionic liquid, 1-alkyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}amide, [Cnmim][NTf2], and trichloromethane, as well as aggregation phenomena.

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U2 - 10.1021/ja0510257

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JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 18

ER -

Evidence for lower critical solution behavior in ionic liquid solutions

Abstract

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