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Dissecting Anion–Cation Interaction Energies in Protic Ionic Liquids

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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  • Verlaine Fossog,

    1. Universität des Saarlandes, Physikalische Chemie, 66123 Saarbrücken (Germany)
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  • Dipl.-Chem. Kai Wittler,

    1. Universität Rostock, Institut für Chemie, Abteilung für Physikalische Chemie, Dr.-Lorenz-Weg 1, 18059, Rostock (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 1191 “Ionic Liquids” and by the DFG Sonderforschungsbereich SFB 652.

Abstract

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The strength of the interaction between anions and cations in protic ionic liquids (PILs) can be extracted from far-IR spectra. A suitable set of specially synthesized PILs was used to correct the frequency shifts of these low vibrational modes for contributions resulting from changing reduced masses only. The experimental results were confirmed by DFT calculations.

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