Density-viscosity product of small-volume ionic liquid samples using quartz crystal impedance analysis

McHale, G, Hardacre, C, Ge, R, Doy, N, Allen, RWK, MacInnes, JM, Bown, MR and Newton, MI ORCID: 0000-0003-4231-1002, 2008. Density-viscosity product of small-volume ionic liquid samples using quartz crystal impedance analysis. Analytical Chemistry, 80, pp. 5806-5811. ISSN 0003-2700

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Quartz crystal impedance analysis has been developed as a technique to assess whether room-temperature ionic liquids are Newtonian fluids and as a small-volume method for determining the values of their viscosity-density product, Gη. Changes in the impedance spectrum of a 5-MHz fundamental frequency quartz crystal induced by a water-miscible room-temperature ionic liquid, 1-butyl-3-methylimiclazolium trifluoromethylsulfonate ([C4mim][OTf]), were measured. From coupled frequency shift and bandwidth changes as the concentration was varied from 0 to 100% ionic liquid, it was determined that this liquid provided a Newtonian response. A second water-immiscible ionic liquid, 1-butyl- 3-methylimidazolium bis(trifluoromethanesulfonyl)imide [C4mim][NTf2], with concentration varied using methanol, was tested and also found to provide a Newtonian response.

Item Type: Journal article
Publication Title: Analytical Chemistry
Creators: McHale, G., Hardacre, C., Ge, R., Doy, N., Allen, R.W.K., MacInnes, J.M., Bown, M.R. and Newton, M.I.
Publisher: American Chemical Society
Place of Publication: Washington, DC
Date: 2008
Volume: 80
ISSN: 0003-2700
Rights: Reprinted with permsision from [citation above]. Copyright © 2008 American Chemical Society.
Divisions: Schools > School of Science and Technology
Depositing User: EPrints Services
Date Added: 09 Oct 2015 09:50
Last Modified: 09 Jun 2017 13:12

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