Evidence for lower critical solution behavior in ionic liquid solutions

Joanna Lachwa; Jerzy Szydlowski; Vesna Najdanovic-Visak; Luís P. N. Rebelo; Kenneth R. Seddon; Manuel Nunes da Ponte; José M. S. S. Esperança; Henrique J. R. Guedes

doi:10.1021/ja0510257

Evidence for lower critical solution behavior in ionic liquid solutions

Joanna Lachwa, Jerzy Szydlowski, Vesna Najdanovic-Visak, Luís P. N. Rebelo, Kenneth R. Seddon, Manuel Nunes da Ponte, José M. S. S. Esperança, Henrique J. R. Guedes

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

120 Citations (Scopus)

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, [C_nmim][NTf₂], and trichloromethane, as well as aggregation phenomena.

Original language	English
Pages (from-to)	6542-6543
Number of pages	2
Journal	Journal of the American Chemical Society
Volume	127
Issue number	18
DOIs	https://doi.org/10.1021/ja0510257
Publication status	Published - 11 May 2005

Keywords

Ionic liquids
Ionic conductivity
Polymerized ionic

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10.1021/ja0510257Licence: CC BY-NC

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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.",

keywords = "Ionic liquids, Ionic conductivity, Polymerized ionic",

author = "Joanna Lachwa and Jerzy Szydlowski and Vesna Najdanovic-Visak and Rebelo, {Lu{\'i}s P. N.} and Seddon, {Kenneth R.} and Ponte, {Manuel Nunes da} and Esperan{\c c}a, {Jos{\'e} M. S. S.} and Guedes, {Henrique J. R.}",

year = "2005",

month = may,

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doi = "10.1021/ja0510257",

language = "English",

volume = "127",

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journal = "Journal of the American Chemical Society",

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Evidence for lower critical solution behavior in ionic liquid solutions. / Lachwa, Joanna; Szydlowski, Jerzy; Najdanovic-Visak, Vesna ; Rebelo, Luís P. N.; Seddon, Kenneth R.; Ponte, Manuel Nunes da ; Esperança, José M. S. S.; Guedes, Henrique J. R.

In: Journal of the American Chemical Society, Vol. 127, No. 18, 11.05.2005, p. 6542-6543.

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

TY - JOUR

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

AU - Lachwa, Joanna

AU - Szydlowski, Jerzy

AU - Najdanovic-Visak, Vesna

AU - Rebelo, Luís P. N.

AU - Seddon, Kenneth R.

AU - Ponte, Manuel Nunes da

AU - Esperança, José M. S. S.

AU - Guedes, Henrique J. R.

PY - 2005/5/11

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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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JO - Journal of the American Chemical Society

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Evidence for lower critical solution behavior in ionic liquid solutions

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Keywords

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