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BP: Fachverband Biologische Physik

BP 41: Biomaterials and Biopolymers II (joint CPP/BP)

BP 41.12: Talk

Thursday, April 3, 2014, 18:15–18:30, ZEU 222

Dynamic glass transition in room temperature ionic liquids with calorimetric methods. — •Evgeni Shoifet^1,2, Heiko Huth¹, Sergey Verevkin^2,3, and Christoph Schick^1,2 — ¹Institute of Physics, Rostock University, Rostock, 18051, Germany — ²Interdisciplinary Faculty, Rostock University, Rostock, 18051, Germany — ³Institute of Chemistry, Rostock University, Rostock, 18051, Germany

Many ionic liquids are good glass formers. Nevertheless, only a few studies of the glass transition in ionic liquids are available so far. Particularly the frequency dependence of the dynamic glass transition (α-relaxation) is not known for most ionic liquids. The standard technique for such studies - dielectric spectroscopy - is not easily applicable to ionic liquids because of the high electrical conductivity. We try to use calorimetric techniques to obtain complex heat capacity and to investigate the dynamic glass transition of room temperature ionic liquids (RTILs) in a wide frequency range. This can give an insight in cooperative motions of ions and ion clusters in RTILs.