Structure and dynamics in protic ionic liquids: a combined optical Kerr-effect and dielectric relaxation spectroscopy study

Turton, D.A., Sonnleitner, T., Ortner, A., Walther, M., Hefter, G., Seddon, K.R., Stana, S., Plechkova, N.V., Buchner, R. and Wynne, K. (2012) Structure and dynamics in protic ionic liquids: a combined optical Kerr-effect and dielectric relaxation spectroscopy study. Faraday Discussions, 154, pp. 145-153. (doi:10.1039/c1fd00054c)

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Abstract

The structure and dynamics of ionic liquids (ILs) are unusual due to the strong interactions between the ions and counter ions. These microscopic properties determine the bulk transport properties critical to applications of ILs such as advanced fuel cells. The terahertz dynamics and slower relaxations of simple alkylammonium nitrate protic ionic liquids (PILs) are here studied using femtosecond optical Kerr-effect spectroscopy, dielectric relaxation spectroscopy, and terahertz time-domain spectroscopy. The observed dynamics give insight into more general liquid behaviour while comparison with glass-forming liquids reveals an underlying power-law decay and relaxation rates suggest supramolecular structure and nanoscale segregation.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Turton, Dr David and Wynne, Professor Klaas
Authors: Turton, D.A., Sonnleitner, T., Ortner, A., Walther, M., Hefter, G., Seddon, K.R., Stana, S., Plechkova, N.V., Buchner, R., and Wynne, K.
Subjects:Q Science > QD Chemistry
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Faraday Discussions
Publisher:Royal Society of Chemistry
ISSN:1359-6640
ISSN (Online):1364-5498
Published Online:14 July 2011
Copyright Holders:Copyright © 2012 The Royal Society of Chemistry
First Published:First published in Faraday Discussions 154:145-153
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
559071Two-dimensional terahertz/IR spectroscopy: a unique probe of ultrafast hydrogen-bond dynamics of liquid water and model systems.Klaas WynneEngineering & Physical Sciences Research Council (EPSRC)EP/F06926X/1CHEM - CHEMISTRY
571341Liquid-liquid transitions in molecular liquids: from supramolecular structure to phase separationKlaas WynneEngineering & Physical Sciences Research Council (EPSRC)EP/J004790/1CHEM - CHEMISTRY
563561Terahertz spectroscopy of aqueous ionic solutions to understand the role of hydrogen-bond network breaking and strengthening in the HofmeisterKlaas WynneEngineering & Physical Sciences Research Council (EPSRC)EP/E046541/1CHEM - CHEMISTRY