SKM 2023 – scientific programme

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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,Linnéstr.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)