Imperial College London
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Prof Jason P. Hallett

Faculty of Engineering, Department of Chemical Engineering

Professor of Sustainable Chemical Technology
 
 
 
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Contact

 

+44 (0)20 7594 5388j.hallett Website

 
 
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Location

 

228bBone BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Claudio:2014:10.1039/c3cp55285c,
author = {Claudio, AFM and Swift, L and Hallett, JP and Welton, T and Coutinho, JAP and Freire, MG},
doi = {10.1039/c3cp55285c},
journal = {Physical Chemistry Chemical Physics},
pages = {6593--6601},
title = {Extended scale for the hydrogen-bond basicity of ionic liquids},
url = {http://dx.doi.org/10.1039/c3cp55285c},
volume = {16},
year = {2014}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In the past decade, ionic liquids (ILs) have been the focus of intensive research regarding their use as potential and alternative solvents in many chemical applications. Targeting their effectiveness, recent investigations have attempted to establish polarity scales capable of ranking ILs according to their chemical behaviours. However, some major drawbacks have been found since polarity scales only report relative ranks because they depend on the set of probe dyes used, and they are sensitive to measurement conditions, such as purity levels of the ILs and procedures employed. Due to all these difficulties it is of crucial importance to find alternative and/or predictive methods and to evaluate them as a priori approaches capable of providing the chemical properties of ILs. Furthermore, the large number of ILs available makes their experimental characterization, usually achieved by a trial and error methodology, burdensome. In this context, we firstly evaluated COSMO-RS, COnductor-like Screening MOdel for Real Solvents, as an alternative tool to estimate the hydrogen-bond basicity of ILs. After demonstrating a straight-line correlation between the experimental hydrogen-bond basicity values and the COSMO-RS hydrogen-bonding energies in equimolar cation–anion pairs, an extended scale for the hydrogen-bond accepting ability of IL anions is proposed here. This new ranking of the ILs' chemical properties opens the possibility to pre-screen appropriate ILs (even those not yet synthesized) for a given task or application.
AU  - Claudio,AFM
AU  - Swift,L
AU  - Hallett,JP
AU  - Welton,T
AU  - Coutinho,JAP
AU  - Freire,MG
DO  - 10.1039/c3cp55285c
EP  - 6601
PY  - 2014///
SN  - 1463-9084
SP  - 6593
TI  - Extended scale for the hydrogen-bond basicity of ionic liquids
T2  - Physical Chemistry Chemical Physics
UR  - http://dx.doi.org/10.1039/c3cp55285c
UR  - http://hdl.handle.net/10044/1/34284
VL  - 16
ER  -
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