Universal Behavior of Dielectric Responses of Glass Formers: Role of Dipole-Dipole Interactions

Physical Review Letters
M PaluchK L Ngai

Abstract

From an exhaustive examination of the molecular dynamics in practically all van der Waals molecular glass formers ever probed by dielectric spectroscopy, we found that the width of the α-loss peak at or near the glass transition temperature T_{g} is strongly anticorrelated with the polarity of the molecule. The larger the dielectric relaxation strength Δε(T_{g}) of the system, the narrower is the α-loss peak. This remarkable property is explained by the contribution from the dipole-dipole interaction potential V_{dd}(r)=-Dr^{-6} to the attractive part of the intermolecular potential, making the resultant potential more harmonic, and the effect increases rapidly with the dipole moment μ and Δε(T_{g}) in view of the relation, D∝(μ^{4}/kT_{g})∝kT_{g}[Δε(T_{g})]^{2}. Since the novel correlation discovered encompasses practically all van der Waals molecular glass formers studied by dielectric spectroscopy, it impacts the large dielectric research community as well as those engaged in solving the glass transition problem.

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Citations

Dec 6, 2016·European Journal of Pharmaceutical Sciences : Official Journal of the European Federation for Pharmaceutical Sciences·U SailajaK L Ngai
Dec 31, 2016·European Journal of Pharmaceutics and Biopharmaceutics : Official Journal of Arbeitsgemeinschaft Für Pharmazeutische Verfahrenstechnik E.V·E KaminskaM Paluch
Dec 30, 2017·Physical Review Letters·S Peter BierwirthCatalin Gainaru
Apr 18, 2020·Physical Chemistry Chemical Physics : PCCP·Thomas KörberErnst A Rössler
Oct 11, 2017·The Journal of Chemical Physics·Tao WuLi-Min Wang
Aug 16, 2017·The Journal of Chemical Physics·Aldona MineckaMarian Paluch
Feb 20, 2020·Physical Review. E·A JedrzejowskaM Paluch
May 4, 2017·Scientific Reports·Michela RomaniniJosep Ll Tamarit
Oct 3, 2019·Physical Review. E·Catalin Gainaru
Apr 9, 2021·The Journal of Physical Chemistry Letters·Florian PabstThomas Blochowicz
Apr 17, 2021·The Journal of Chemical Physics·Xiao JinLi-Min Wang
May 21, 2020·The Journal of Physical Chemistry. B·Adam P HoltCharles Michael Roland
Dec 18, 2020·The Journal of Physical Chemistry Letters·M Rams-BaronM Paluch
May 9, 2018·Molecular Pharmaceutics·Justyna Knapik-KowalczukMarian Paluch
Sep 22, 2018·The Journal of Physical Chemistry Letters·Hai-Bin YuKonrad Samwer
Jul 2, 2020·The Journal of Physical Chemistry Letters·Di XuR Richert
Oct 26, 2021·Physical Chemistry Chemical Physics : PCCP·Jennifer BolleChristian Sternemann

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