title: Equilibrium of contact and solvent-separated ion pairs in mixtures of protic ionic liquids and molecular solvents controlled by polarity.
abstract: Polarity controls the equilibrium constants and free energies of contact ion pairs (CIPs) and solvent-separated ion pairs (SIPs) in mixtures of protic ionic liquids and molecular solvents. The subtle balance between the ionic species was studied by far-infrared difference spectra and related DFT-calculated properties for solvents of low and high polarity and for different solvent concentrations.
authors.affiliation: Universität Rostock, Institut für Chemie, Abteilung für Physikalische Chemie, Dr.-Lorenz-Weg 1, 18059, Rostock (Germany).
authors.forename: Koichi
authors.initials: K
authors.lastname: Fumino
authors.forename: Peter
authors.initials: P
authors.lastname: Stange
authors.forename: Verlaine
authors.initials: V
authors.lastname: Fossog
authors.forename: Rolf
authors.initials: R
authors.lastname: Hempelmann
authors.forename: Ralf
authors.initials: R
authors.lastname: Ludwig
mesh_terms: D052578:Ionic Liquids / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D012997:Solvents / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013816:Thermodynamics
chemical_list: D052578:Ionic Liquids; D007477:Ions; D012997:Solvents
keywords: FTIR spectroscopy; density functional calculations; ion pairing; ionic liquids; polarity