Brønsted ionic liquids for sustainable processes: synthesis and physical properties

Álvarez, V. H., Dosil, N., Gonzalez-Cabaleiro, R. , Mattedi, S., Martin-Pastor, M., Iglesias, M. and Navaza, J. M. (2010) Brønsted ionic liquids for sustainable processes: synthesis and physical properties. Journal of Chemical and Engineering Data, 55(2), pp. 625-632. (doi:10.1021/je900550v)

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Abstract

This report describes the synthesis of ionic liquids that incorporate the N-methyl-2-hydroxyethylammonium cation with various carboxylic acid anions and the study of some of their physical properties, including self-diffusion coefficients, density, speed of sound, viscosity, and refractive index. 1H and 13C NMR spectra were used to characterize the chemical structure of the species in concordance with FT-IR spectra. DOSY NMR spectra was used to determine the self-diffusion coefficients of the components, which were consistent with the formation of a lamellar or micellar liquid-crystal phase in samples containing an alkyl chain in the anion species. Thermoacoustic parameters showed that anion alkyl chain has an influence on the molecular packing of these ionic liquids. In addition, the effect of temperature on the properties seems to be related to the size and the type of aliphatic chain of the ionic liquid.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Gonzalez-Cabaleiro, Dr Rebeca
Authors: Álvarez, V. H., Dosil, N., Gonzalez-Cabaleiro, R., Mattedi, S., Martin-Pastor, M., Iglesias, M., and Navaza, J. M.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:Journal of Chemical and Engineering Data
Publisher:American Chemical Society
ISSN:0021-9568
ISSN (Online):1520-5134
Published Online:10 January 2010

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