Macroscopic and microscopic study of 1-Ethyl-3-methyl-imidazolium acetate-water mixtures

Craig A. Hall, Kim A. Le, Cyrielle Rudaz, Asanah Radhi, Christopher S. Lovell, Robin A. Damion, Tatiana Budtova, Michael E. Ries*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

84 Citations (Scopus)

Abstract

Mixtures of 1-ethyl-3-methyl-imidazolium acetate ([C2mim][OAc]) and water across the entire composition range, from pure [C2mim][OAc] to pure water, have been investigated using density, viscosity, and NMR spectroscopy, relaxometry, and diffusion measurements. These results have been compared to ideal mixing laws for the microscopic data obtained from the NMR results and macroscopic data through the viscosity and density. It was also found that the mixing of the two fluids is exothermal. The proton spectra indicate though that [C2mim][OAc] and water are interacting without the formation of new compounds. The maximal deviations of experimental data from theoretical mixing rules were all found to occur within the range 0.74 ± 0.06 mol fraction of water, corresponding to approximately three water molecules per [C2mim][OAc] molecule.

Original languageEnglish
Pages (from-to)12810-12818
Number of pages9
JournalJournal of Physical Chemistry B
Volume116
Issue number42
DOIs
Publication statusPublished - 25 Oct 2012

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