title: Macroscopic and microscopic study of 1-ethyl-3-methyl-imidazolium acetate-water mixtures.
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.
authors.affiliation: School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom.
authors.forename: Craig A
authors.initials: CA
authors.lastname: Hall
authors.forename: Kim A
authors.initials: KA
authors.lastname: Le
authors.forename: Cyrielle
authors.initials: C
authors.lastname: Rudaz
authors.forename: Asanah
authors.initials: A
authors.lastname: Radhi
authors.forename: Christopher S
authors.initials: CS
authors.lastname: Lovell
authors.forename: Robin A
authors.initials: RA
authors.lastname: Damion
authors.forename: Tatiana
authors.initials: T
authors.lastname: Budtova
authors.forename: Michael E
authors.initials: ME
authors.lastname: Ries
mesh_terms: D004058:Diffusion; D007093:Imidazoles / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D014783:Viscosity; D014867:Water / Q000737:chemistry*
chemical_list: D007093:Imidazoles; D014867:Water; C518739:1-ethyl-3-methylimidazolium