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Issue 18, 2017
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Alternative probe for the determination of the hydrogen-bond acidity of ionic liquids and their aqueous solutions

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Abstract

Although highly relevant to a priori select adequate solvents for a given application, the determination of the hydrogen-bond acidity or proton donor ability of aqueous solutions of ionic liquids is a difficult task due to the poor solubility of the commonly used probes in aqueous media. In this work, we demonstrate the applicability of the pyridine-N-oxide probe to determine the hydrogen-bond acidity of both neat ionic liquids and their aqueous solutions, based on 13C NMR chemical shifts, and the suitability of these values to appraise the ability of ionic liquids to form aqueous two-phase systems.

Graphical abstract: Alternative probe for the determination of the hydrogen-bond acidity of ionic liquids and their aqueous solutions

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Supplementary files

Article information


Submitted
01 Dec 2016
Accepted
03 Apr 2017
First published
06 Apr 2017

Phys. Chem. Chem. Phys., 2017,19, 11011-11016
Article type
Communication

Alternative probe for the determination of the hydrogen-bond acidity of ionic liquids and their aqueous solutions

P. P. Madeira, H. Passos, J. Gomes, J. A. P. Coutinho and M. G. Freire, Phys. Chem. Chem. Phys., 2017, 19, 11011
DOI: 10.1039/C6CP08210F

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