Water in Ionic Liquids: Correlation between Anion Hydrophilicity and Near-Infrared Fingerprints

Elena TomŠík; Natalia Gospodinova

doi:10.1002/cphc.201600115

Water in Ionic Liquids: Correlation between Anion Hydrophilicity and Near-Infrared Fingerprints

Chemphyschem. 2016 Jun 3;17(11):1586-90. doi: 10.1002/cphc.201600115. Epub 2016 Mar 22.

Authors

Elena TomŠík¹, Natalia Gospodinova²

Affiliations

¹ Department of Conducting polymers, Institute of Macromolecular Chemistry, v.v.i. Academy of Science of the Czech Republic, Heyrovsky Sq. 2, 162 06, Prague 6, Czech Republic.
² Department of Conducting polymers, Institute of Macromolecular Chemistry, v.v.i. Academy of Science of the Czech Republic, Heyrovsky Sq. 2, 162 06, Prague 6, Czech Republic. gospodinova@imc.cas.cz.

PMID: 27001562
DOI: 10.1002/cphc.201600115

Abstract

We show that fingerprints of the different states of water association can be clearly distinguished in the range of the first overtone of water's symmetric O-H stretching in the spectra of water-saturated [EMIm](+) -based ionic liquids with anions of substantially different hydrophilicity, such as hydrophobic [(CF3 SO2 )2 N](-) , moderately hydrophilic [CF3 SO3 ](-) , and highly hydrophilic [HSO4 ](-) .

Keywords: NIR spectroscopy; anions; hydrophilicity; ionic liquids; water.

Publication types

Research Support, Non-U.S. Gov't