Kinetic dielectric decrement revisited

Autor(en)

Marcello Sega, Sofia Kantorovich, Axel Arnold

Abstrakt

With the help of a recently developed non-equilibrium approach, we investigate the ionic strength dependence of the Hubbard-Onsager dielectric decrement. We compute the depolarization of water molecules caused by the motion of ions in sodium chloride solutions from the dilute regime (0.035 M) up close to the saturation concentration (4.24 M), and find that the kinetic decrement displays a strong non-monotonic behavior, in contrast to the prediction of available models. We introduce a phenomenological modification of the Hubbard-Onsager continuum theory, which takes into account the screening due to the ionic cloud at the mean-field level and, which is able to describe the kinetic decrement at high concentrations including the presence of a pronounced minimum.

Organisation(en)

Institut für Computergestützte Biologische Chemie, Computergestützte Physik und Physik der Weichen Materie

Externe Organisation(en)

Ural Federal University, Universität Stuttgart

Journal

Physical Chemistry Chemical Physics

Band

17

Seiten

130-133

Anzahl der Seiten

4

ISSN

1463-9076

DOI

https://doi.org/10.1039/c4cp04182h

Publikationsdatum

2015

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie, 104017 Physikalische Chemie, 103019 Mathematische Physik

Schlagwörter

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie, Physical and Theoretical Chemistry

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/551b360c-1e78-4b4d-8925-3a4906aa7a38