title: Vapourisation of ionic liquids.
abstract: Eight common imidazolium based ionic liquids have been successfully evaporated in ultra-high vacuum, their vapours analysed by line of sight mass spectrometry and their heats (enthalpy) of vapourisation determined. They were found to evaporate as ion pairs, with heats of vapourisation which depend primarily on the coulombic interactions within the liquid phase and the gas phase ion pair. An electrostatic model is presented relating the heats of vapourisation to the molar volumes of the ionic liquids.
authors.affiliation: Department of Physical Chemistry, School of Chemistry, University Park, University of Nottingham, Nottingham, UK.
authors.forename: James P
authors.initials: JP
authors.lastname: Armstrong
authors.forename: Christopher
authors.initials: C
authors.lastname: Hurst
authors.forename: Robert G
authors.initials: RG
authors.lastname: Jones
authors.forename: Peter
authors.initials: P
authors.lastname: Licence
authors.forename: Kevin R J
authors.initials: KR
authors.lastname: Lovelock
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Satterley
authors.forename: Ignacio J
authors.initials: IJ
authors.lastname: Villar-Garcia
mesh_terms: D005740:Gases; D006358:Hot Temperature; D007093:Imidazoles / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry*; D013058:Mass Spectrometry; D055672:Static Electricity; D014835:Volatilization
chemical_list: D005740:Gases; D007093:Imidazoles; D052578:Ionic Liquids