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Equilibrium of Contact and Solvent-Separated Ion Pairs in Mixtures of Protic Ionic Liquids and Molecular Solvents Controlled by Polarity

Authors

  • Dr. Koichi Fumino,

    1. Universität Rostock, Institut für Chemie, Abteilung für Physikalische Chemie, Dr.-Lorenz-Weg 1, 18059, Rostock (Germany)
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  • B. Sc. Peter Stange,

    1. Universität Rostock, Institut für Chemie, Abteilung für Physikalische Chemie, Dr.-Lorenz-Weg 1, 18059, Rostock (Germany)
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  • M. Sc. Verlaine Fossog,

    1. Universität des Saarlandes, Physikalische Chemie, 66123 Saarbrücken (Germany)
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  • Prof. Dr. Rolf Hempelmann,

    1. Universität des Saarlandes, Physikalische Chemie, 66123 Saarbrücken (Germany)
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  • Prof. Dr. Ralf Ludwig

    Corresponding author
    1. Universität Rostock, Institut für Chemie, Abteilung für Physikalische Chemie, Dr.-Lorenz-Weg 1, 18059, Rostock (Germany)
    2. Leibniz-Institut für Katalyse an der Universität Rostock e.V. Albert-Einstein-Strasse 29a, 18059 Rostock (Germany)
    • Universität Rostock, Institut für Chemie, Abteilung für Physikalische Chemie, Dr.-Lorenz-Weg 1, 18059, Rostock (Germany)

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  • This work was supported by the DFG Priority Programme SPP 1191 “Ionic liquids” and by the DFG Collaborative Research Area SFB 652 “Strong correlations and collective effects in radiation fields: Coulomb systems, clusters and particles”.

Abstract

original image

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.

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