Berlin 2018 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 62: Charged Soft Matter, Polyelectrolytes and Ionic Liquids III

CPP 62.11: Vortrag

Donnerstag, 15. März 2018, 12:15–12:30, C 243

Dielectric Spectroscopy on Choline-Chloride Based Deep Eutectic Solvents — •Daniel Reuter, Peter Lunkenheimer, and Alois Loidl — Experimental Physics V, University of Augsburg, Germany

Deep eutectic solvents (DES) are a promising new class of ionic liquid analogues [1]. Via mixing of two solid materials in eutectic composition, a DES liquid phase is obtained that is characterized by its low melting point compared to its individual constituents. Prominent examples are the mixtures of Choline Chloride (ChCl) with various hydrogen bound donors like, e.g., glycerol [2]. In this talk, we present dielectric spectroscopy data of three ChCl based DES in a broad frequency and temperature range. Especially, we investigate the so far widely neglected molecular reorientational dynamics and its correlation to the ionic conductivity. Here, our findings provide valuable information on molecular and ion diffusion in DES.
E. Smith, A. Abbott, and K. Ryder, Chem. Rev. 114, 11060 (2014). [2] D. Wagle, H. Zhao, and G. Baker, Acc. Chem. Res. 47, 2299 (2014).