title: On the collective network of ionic liquid/water mixtures. IV. Kinetic and rotational depolarization.
abstract: Dielectric spectroscopy is a measure of the collective Coulomb interaction in liquid systems. Adding ionic liquids to an aqueous solution results in a decrease of the static value of the generalized dielectric constant which cannot be attributed to kinetic depolarization models characterized by the static conductivity and rotational relaxation constant. However, a dipolar Poisson-Boltzmann model computing the water depolarization in the proximity of ions is not only successful for simple electrolytes but also in case of molecular ionic liquids. Moreover, our simple geometric hydration model is also capable to explain the dielectric depolarization. Both models compute the dielectric constant of water and obtain the overall dielectric constant by averaging the values of its components, water and the ionic liquid, weighted by their volume occupancies. In this sense, aqueous ionic liquid mixtures seem to behave like polar mixtures.
authors.affiliation: Department of Computational Biological Chemistry, University of Vienna, Währingerstrasse 17, A- 1090 Vienna, Austria.
authors.forename: Christian
authors.initials: C
authors.lastname: Schröder
authors.affiliation: Department of Computational Biological Chemistry, University of Vienna, Währingerstrasse 17, A- 1090 Vienna, Austria.
authors.forename: Marcello
authors.initials: M
authors.lastname: Sega
authors.affiliation: Department of Computational Biological Chemistry, University of Vienna, Währingerstrasse 17, A- 1090 Vienna, Austria.
authors.forename: Michael
authors.initials: M
authors.lastname: Schmollngruber
authors.affiliation: Department of Computational Biological Chemistry, University of Vienna, Währingerstrasse 17, A- 1090 Vienna, Austria.
authors.forename: Elias
authors.initials: E
authors.lastname: Gailberger
authors.affiliation: Department of Computational Biological Chemistry, University of Vienna, Währingerstrasse 17, A- 1090 Vienna, Austria.
authors.forename: Daniel
authors.initials: D
authors.lastname: Braun
authors.affiliation: Department of Computational Biological Chemistry, University of Vienna, Währingerstrasse 17, A- 1090 Vienna, Austria.
authors.forename: Othmar
authors.initials: O
authors.lastname: Steinhauser
mesh_terms: D004573:Electrolytes; D052578:Ionic Liquids / Q000737:chemistry*; D007700:Kinetics; D008956:Models, Chemical; D014867:Water / Q000737:chemistry*
chemical_list: D004573:Electrolytes; D052578:Ionic Liquids; D014867:Water