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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 20: Polymer and Molecular Dynamics, Friction and Rheology
CPP 20.10: Talk
Tuesday, March 28, 2023, 12:15–12:30, ZEU 255
Orientation Polarization Spectroscopy — •Friedrich Kremer, Wycliffe Kipnusu, and Markus Anton — Leipzig University, Peter Debye Institute for Soft Matter Physics,LinnĂ©str.5,04103Leipzig,Germany
The theory of orientation polarization and dielectric relaxation was developed by P. Debye more than 100 years ago. It is based on approximating a molecule by a sphere having one or more dipole moments. By that the detailed intra- and inter-molecular interactions are explicitly not taken into consideration. In this contribution the principal limitations of the Debye approximation are discussed and novel experiments based on Quantum Cascade IR-Lasers are presented [1] which enable to determine the orientation polarization of selected molecular moieties for the example of the glass forming liquid glycerol. [1] Kremer, F. et al. Int. J. Mol. Sci. 23, 8254 (2022)