BPCPPDYSOE21 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 16: Charged Soft Matter - organized by Joachim Dzubiella (Albert Ludwigs University Freiburg, Freiburg)
CPP 16.3: Vortrag
Mittwoch, 24. März 2021, 10:00–10:20, CPPa
Hydrogen Bonding and Charge Transport in a Protic Polymerized Ionic Liquid — •Arthur Markus Anton1,2, Falk Frenzel2, Jiayin Yuan3, Martin Tress2,4, and Friedrich Kremer2 — 1The University of Sheffield, Department for Physics & Astronomy, Sheffield, UK — 2Leipzig University, Peter Debye Institute for Soft Matter Physics, Leipzig, Germany — 3Stockholm University, Department of Materials and Environmental Chemistry, Stockholm, Sweden — 4University of Tennessee Knoxville, Department of Chemistry, Knoxville, USA
Fourier transform infrared and broadband dielectric spectroscopy are combined in order to study hydrogen bonding and charge transport in the protic polymerized ionic liquid PAAPS in a wide temperature range from 170 to 300K. While the former allows to follow the formation of hydrogen bonds, the latter enables to record the complex conductivity in the spectral range from 10-2 to 10+9 Hz. On the one hand, the formation of the H-bond network exhibits a pronounced thermal hysteresis, whereas, on the other hand, the effective conductivity is reversibly affected by temperature. In combination with the fact that the conductivity changes with temperature by orders of magnitude, whereas the integrated absorbance of the N-H stretching vibration(being proportional to the number density of protons in the hydrogen bond network) changes only by a factor of 4, it is concluded that charge transport takes place predominantly due to dynamic glass transition assisted hopping conduction mechanism and is not significantly affected by the establishment of H-bonds.