Understanding the polarity of ionic liquids

M. A. Ab Rani; A. Brant; L. Crowhurst; A. Dolan; N. H. Hassan; J. P. Hallett; P. A. Hunt; M. Lui; H. Niedermeyer; J. M. Perez-Arlandis; M. Schrems; T. Q. To; T. Welton; R. Wilding

doi:10.1039/c1cp21262a

Understanding the polarity of ionic liquids

M. A. Ab Rani, A. Brant, L. Crowhurst, A. Dolan, N. H. Hassan, J. P. Hallett, P. A. Hunt, M. Lui, H. Niedermeyer, J. M. Perez-Arlandis, M. Schrems, T. Q. To, T. Welton^*, R. Wilding

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

459 Citations (Scopus)

Abstract

The polarities of a wide range of ionic liquids have been determined using the Kamlet-Taft empirical polarity scales α, β and π, with the dye set Reichardt’s Dye, N, N-diethyl-4-nitroaniline and 4-nitroaniline. These have been compared to measurements of these parameters with different dye sets and to different polarity scales. The results emphasise the importance of recognising the role that the nature of the solute plays in determining these scales. It is particularly noted that polarity scales based upon charged solutes can give very different values for the polarity of ionic liquids compared to those based upon neutral probes. Finally, the effects of commonplace impurities in ionic liquids are reported.

Original language	English
Pages (from-to)	16831-16840
Number of pages	10
Journal	Physical Chemistry Chemical Physics
Volume	13
Issue number	37
DOIs	https://doi.org/10.1039/c1cp21262a
Publication status	Published - 7 Oct 2011

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@article{d9b299fae388468893997815e8181a5b,

title = "Understanding the polarity of ionic liquids",

abstract = "The polarities of a wide range of ionic liquids have been determined using the Kamlet-Taft empirical polarity scales α, β and π, with the dye set Reichardt{\textquoteright}s Dye, N, N-diethyl-4-nitroaniline and 4-nitroaniline. These have been compared to measurements of these parameters with different dye sets and to different polarity scales. The results emphasise the importance of recognising the role that the nature of the solute plays in determining these scales. It is particularly noted that polarity scales based upon charged solutes can give very different values for the polarity of ionic liquids compared to those based upon neutral probes. Finally, the effects of commonplace impurities in ionic liquids are reported.",

author = "{Ab Rani}, {M. A.} and A. Brant and L. Crowhurst and A. Dolan and Hassan, {N. H.} and Hallett, {J. P.} and Hunt, {P. A.} and M. Lui and H. Niedermeyer and Perez-Arlandis, {J. M.} and M. Schrems and To, {T. Q.} and T. Welton and R. Wilding",

note = "Acknowledgements: We would like to thank the European Research Council for the award of an Advanced Investigator grant and BASF for their continuing support of our research. Publisher copyright: {\textcopyright} the Owner Societies 2011",

year = "2011",

month = oct,

day = "7",

doi = "10.1039/c1cp21262a",

language = "English",

volume = "13",

pages = "16831--16840",

journal = "Physical Chemistry Chemical Physics",

issn = "1463-9076",

publisher = "Royal Society of Chemistry",

number = "37",

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TY - JOUR

T1 - Understanding the polarity of ionic liquids

AU - Ab Rani, M. A.

AU - Brant, A.

AU - Crowhurst, L.

AU - Dolan, A.

AU - Hassan, N. H.

AU - Hallett, J. P.

AU - Hunt, P. A.

AU - Lui, M.

AU - Niedermeyer, H.

AU - Perez-Arlandis, J. M.

AU - Schrems, M.

AU - To, T. Q.

AU - Welton, T.

AU - Wilding, R.

N1 - Acknowledgements: We would like to thank the European Research Council for the award of an Advanced Investigator grant and BASF for their continuing support of our research. Publisher copyright: © the Owner Societies 2011

PY - 2011/10/7

Y1 - 2011/10/7

N2 - The polarities of a wide range of ionic liquids have been determined using the Kamlet-Taft empirical polarity scales α, β and π, with the dye set Reichardt’s Dye, N, N-diethyl-4-nitroaniline and 4-nitroaniline. These have been compared to measurements of these parameters with different dye sets and to different polarity scales. The results emphasise the importance of recognising the role that the nature of the solute plays in determining these scales. It is particularly noted that polarity scales based upon charged solutes can give very different values for the polarity of ionic liquids compared to those based upon neutral probes. Finally, the effects of commonplace impurities in ionic liquids are reported.

AB - The polarities of a wide range of ionic liquids have been determined using the Kamlet-Taft empirical polarity scales α, β and π, with the dye set Reichardt’s Dye, N, N-diethyl-4-nitroaniline and 4-nitroaniline. These have been compared to measurements of these parameters with different dye sets and to different polarity scales. The results emphasise the importance of recognising the role that the nature of the solute plays in determining these scales. It is particularly noted that polarity scales based upon charged solutes can give very different values for the polarity of ionic liquids compared to those based upon neutral probes. Finally, the effects of commonplace impurities in ionic liquids are reported.

UR - https://doi.org/10.1039/C1CP90197D

UR - http://www.scopus.com/inward/record.url?scp=80052528682&partnerID=8YFLogxK

U2 - 10.1039/c1cp21262a

DO - 10.1039/c1cp21262a

M3 - Journal article

AN - SCOPUS:80052528682

SN - 1463-9076

VL - 13

SP - 16831

EP - 16840

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

IS - 37

ER -

Understanding the polarity of ionic liquids

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