Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 26: Poster: Charged Soft Matter, Polyelectrolytes, Ionic Liquids
CPP 26.1: Poster
Dienstag, 8. März 2016, 18:15–21:00, Poster B2
Static dielectric properties of dense ionic fluids — •Grigorii Zarubin1,2 and Markus Bier1,2 — 1Max Planck Institute IS — 2University of Stuttgart
In order to interpret surface force apparatus measurements recent experimental work [1] suggests that room temperature ionic liquids (RTILs) can be viewed as dilute electrolyte solutions with a few mobile ions in an effective solvent made of temporary paired ions. In this work we attempt to answer whether this model is viable looking at RTILs from the point of view of their dielectric properties.
Using calculated electrical susceptibility χ(k)=ε(k)−1 we showed [2] that RTILs are expected to behave plasma-like on sufficiently long distances however exhibiting dipolar fluid-like dielectric properties for small separations. Thus, the recently debated interpretation of RTILs as dilute electrolyte solutions [1] might not be simply a yes-no-question but it might depend on the considered lengthscale.
[1] M. Gebbie et al., Proc. Natl. Acad. Sci. U. S. A. 110, 9674 (2013)
[2] G. Zarubin and M. Bier, J. Chem. Phys. 142, 184502 (2015)