Rudzinski, Joseph F. ; Kloth, Sebastian ; Wörner, Svenja ; Pal, Tamisra ; Kremer, Kurt ; Bereau, Tristan ; Vogel, Michael (2021)
Dynamical properties across different coarse-grained models for ionic liquids.
In: Journal of Physics: Condensed Matter, 33 (22)
doi: 10.1088/1361-648X/abe6e1
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
Room-temperature ionic liquids (RTILs) stand out among molecular liquids for their rich physicochemical characteristics, including structural and dynamic heterogeneity. The significance of electrostatic interactions in RTILs results in long characteristic length- and timescales, and has motivated the development of a number of coarse-grained (CG) simulation models. In this study, we aim to better understand the connection between certain CG parameterization strategies and the dynamical properties and transferability of the resulting models. We systematically compare five CG models: a model largely parameterized from experimental thermodynamic observables; a refinement of this model to increase its structural accuracy; and three models that reproduce a given set of structural distribution functions by construction, with varying intramolecular parameterizations and reference temperatures. All five CG models display limited structural transferability over temperature, and also result in various effective dynamical speedup factors, relative to a reference atomistic model. On the other hand, the structure-based CG models tend to result in more consistent cation–anion relative diffusion than the thermodynamic-based models, for a single thermodynamic state point. By linking short- and long-timescale dynamical behaviors, we demonstrate that the varying dynamical properties of the different CG models can be largely collapsed onto a single curve, which provides evidence for a route to constructing dynamically-consistent CG models of RTILs.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Rudzinski, Joseph F. ; Kloth, Sebastian ; Wörner, Svenja ; Pal, Tamisra ; Kremer, Kurt ; Bereau, Tristan ; Vogel, Michael |
| Art des Eintrags: | Bibliographie |
| Titel: | Dynamical properties across different coarse-grained models for ionic liquids |
| Sprache: | Englisch |
| Publikationsjahr: | 4 Mai 2021 |
| Verlag: | IOP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Physics: Condensed Matter |
| Jahrgang/Volume einer Zeitschrift: | 33 |
| (Heft-)Nummer: | 22 |
| Kollation: | 15 Seiten |
| DOI: | 10.1088/1361-648X/abe6e1 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | Room-temperature ionic liquids (RTILs) stand out among molecular liquids for their rich physicochemical characteristics, including structural and dynamic heterogeneity. The significance of electrostatic interactions in RTILs results in long characteristic length- and timescales, and has motivated the development of a number of coarse-grained (CG) simulation models. In this study, we aim to better understand the connection between certain CG parameterization strategies and the dynamical properties and transferability of the resulting models. We systematically compare five CG models: a model largely parameterized from experimental thermodynamic observables; a refinement of this model to increase its structural accuracy; and three models that reproduce a given set of structural distribution functions by construction, with varying intramolecular parameterizations and reference temperatures. All five CG models display limited structural transferability over temperature, and also result in various effective dynamical speedup factors, relative to a reference atomistic model. On the other hand, the structure-based CG models tend to result in more consistent cation–anion relative diffusion than the thermodynamic-based models, for a single thermodynamic state point. By linking short- and long-timescale dynamical behaviors, we demonstrate that the varying dynamical properties of the different CG models can be largely collapsed onto a single curve, which provides evidence for a route to constructing dynamically-consistent CG models of RTILs. |
| Freie Schlagworte: | room-temperature ionic liquids, multiscale modeling, coarse-grained dynamics, structural-dynamical relationships |
| Zusätzliche Informationen: | Art.No.: 224001; Erstveröffentlichung |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Festkörperphysik (2021 umbenannt in Institut für Physik Kondensierter Materie (IPKM)) 05 Fachbereich Physik > Institut für Festkörperphysik (2021 umbenannt in Institut für Physik Kondensierter Materie (IPKM)) > Molekulare Dynamik in kondensierter Materie |
| Hinterlegungsdatum: | 06 Mai 2021 13:05 |
| Letzte Änderung: | 05 Mär 2024 11:15 |
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Dynamical properties across different coarse-grained models for ionic liquids. (deposited 09 Jan 2024 10:46)
- Dynamical properties across different coarse-grained models for ionic liquids. (deposited 06 Mai 2021 13:05) [Gegenwärtig angezeigt]
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