Ionic liquids in polyethylene glycol aqueous solutions: Salting-in and salting-out effects

Zoran P. Visak; José N. Canongia Lopes; Luis Paulo N. Rebelo

doi:10.1007/s00706-007-0721-3

Ionic liquids in polyethylene glycol aqueous solutions: Salting-in and salting-out effects

Zoran P. Visak
, José N. Canongia Lopes^*
, Luis Paulo N. Rebelo

^*Corresponding author for this work

Universidade Nova de Lisboa
Centro de Química Estrutural, Instituto Superior Técnico

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

59 Citations (Scopus)

Abstract

Changes of the fluid phase behaviour of polyethylene glycol (PEG) aqueous solutions - viz. critical solution temperature shifts at atmospheric pressure - were produced by the addition of different ionic liquids, namely 1-ethyl-3-methylimidazolium ethyl sulfate and 1-alkyl-3-methylimidazolium chloride (alkyl = ethyl to decyl). The addition of ionic liquids with long alkyl chains improves the solubility of PEG in water (salting-in effect), whereas the impact of short-chain ionic liquids is usually the contrary (salting-out effect). The results are interpreted taking into account the kosmotropic (water-structuring) or chaotropic (water-structure-breaking) nature of ionic liquids, as compared to other inorganic salts.

Original language	English
Pages (from-to)	1153-1157
Number of pages	5
Journal	Monatshefte fur Chemie
Volume	138
Issue number	11
DOIs	https://doi.org/10.1007/s00706-007-0721-3
Publication status	Published - 1 Nov 2007

Keywords

Aqueous PEG solutions
Ionic Liquids
Kosmotropic and chaotropic salts
Salting-out effects

Access to Document

10.1007/s00706-007-0721-3

Cite this

@article{4ef3c559752d479d85508e8cc9862d87,

title = "Ionic liquids in polyethylene glycol aqueous solutions: Salting-in and salting-out effects",

abstract = "Changes of the fluid phase behaviour of polyethylene glycol (PEG) aqueous solutions - viz. critical solution temperature shifts at atmospheric pressure - were produced by the addition of different ionic liquids, namely 1-ethyl-3-methylimidazolium ethyl sulfate and 1-alkyl-3-methylimidazolium chloride (alkyl = ethyl to decyl). The addition of ionic liquids with long alkyl chains improves the solubility of PEG in water (salting-in effect), whereas the impact of short-chain ionic liquids is usually the contrary (salting-out effect). The results are interpreted taking into account the kosmotropic (water-structuring) or chaotropic (water-structure-breaking) nature of ionic liquids, as compared to other inorganic salts.",

keywords = "Aqueous PEG solutions, Ionic Liquids, Kosmotropic and chaotropic salts, Salting-out effects",

author = "Visak, \{Zoran P.\} and \{Canongia Lopes\}, \{Jos{\'e} N.\} and Rebelo, \{Luis Paulo N.\}",

year = "2007",

month = nov,

day = "1",

doi = "10.1007/s00706-007-0721-3",

language = "English",

volume = "138",

pages = "1153--1157",

journal = "Monatshefte fur Chemie",

issn = "0026-9247",

publisher = "Springer",

number = "11",

}

TY - JOUR

T1 - Ionic liquids in polyethylene glycol aqueous solutions

T2 - Salting-in and salting-out effects

AU - Visak, Zoran P.

AU - Canongia Lopes, José N.

AU - Rebelo, Luis Paulo N.

PY - 2007/11/1

Y1 - 2007/11/1

N2 - Changes of the fluid phase behaviour of polyethylene glycol (PEG) aqueous solutions - viz. critical solution temperature shifts at atmospheric pressure - were produced by the addition of different ionic liquids, namely 1-ethyl-3-methylimidazolium ethyl sulfate and 1-alkyl-3-methylimidazolium chloride (alkyl = ethyl to decyl). The addition of ionic liquids with long alkyl chains improves the solubility of PEG in water (salting-in effect), whereas the impact of short-chain ionic liquids is usually the contrary (salting-out effect). The results are interpreted taking into account the kosmotropic (water-structuring) or chaotropic (water-structure-breaking) nature of ionic liquids, as compared to other inorganic salts.

AB - Changes of the fluid phase behaviour of polyethylene glycol (PEG) aqueous solutions - viz. critical solution temperature shifts at atmospheric pressure - were produced by the addition of different ionic liquids, namely 1-ethyl-3-methylimidazolium ethyl sulfate and 1-alkyl-3-methylimidazolium chloride (alkyl = ethyl to decyl). The addition of ionic liquids with long alkyl chains improves the solubility of PEG in water (salting-in effect), whereas the impact of short-chain ionic liquids is usually the contrary (salting-out effect). The results are interpreted taking into account the kosmotropic (water-structuring) or chaotropic (water-structure-breaking) nature of ionic liquids, as compared to other inorganic salts.

KW - Aqueous PEG solutions

KW - Ionic Liquids

KW - Kosmotropic and chaotropic salts

KW - Salting-out effects

UR - https://www.scopus.com/pages/publications/35648997963

UR - https://link.springer.com/article/10.1007%2Fs00706-007-0721-3

U2 - 10.1007/s00706-007-0721-3

DO - 10.1007/s00706-007-0721-3

M3 - Article

AN - SCOPUS:35648997963

SN - 0026-9247

VL - 138

SP - 1153

EP - 1157

JO - Monatshefte fur Chemie

JF - Monatshefte fur Chemie

IS - 11

ER -

Ionic liquids in polyethylene glycol aqueous solutions: Salting-in and salting-out effects

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this