Dynamics of Ionic Liquids in Confinement by Means of NMR Relaxometry—EMIM-FSI in a Silica Matrix as an Example

(1)H and (19)F spin–lattice relaxation studies for 1-ethyl-3-methylimidazolium bis(fluorosulfonyl)imide in bulk and mesoporous MCM-41 silica matrix confinement were performed under varying temperatures in a broad range of magnetic fields, corresponding to (1)H resonance frequency from 5Hz to 30MHz.A...

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Autores principales: Kruk, Danuta, Wojciechowski, Milosz, Florek-Wojciechowska, Malgorzata, Singh, Rajendra Kumar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7579494/
https://www.ncbi.nlm.nih.gov/pubmed/33007881
http://dx.doi.org/10.3390/ma13194351
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author Kruk, Danuta
Wojciechowski, Milosz
Florek-Wojciechowska, Malgorzata
Singh, Rajendra Kumar
author_facet Kruk, Danuta
Wojciechowski, Milosz
Florek-Wojciechowska, Malgorzata
Singh, Rajendra Kumar
author_sort Kruk, Danuta
collection PubMed
description (1)H and (19)F spin–lattice relaxation studies for 1-ethyl-3-methylimidazolium bis(fluorosulfonyl)imide in bulk and mesoporous MCM-41 silica matrix confinement were performed under varying temperatures in a broad range of magnetic fields, corresponding to (1)H resonance frequency from 5Hz to 30MHz.A thorough analysis of the relaxation data revealed a three-dimensional translation diffusion of the ions in the bulk liquid and two-dimensional diffusion in the vicinity of the confining walls in the confinement. Parameters describing the translation dynamics were determined and compared. The rotational motion of both kinds of ions in the confinement was described by two correlation times that might be attributed to anisotropic reorientation of these species.
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spelling pubmed-75794942020-10-29 Dynamics of Ionic Liquids in Confinement by Means of NMR Relaxometry—EMIM-FSI in a Silica Matrix as an Example Kruk, Danuta Wojciechowski, Milosz Florek-Wojciechowska, Malgorzata Singh, Rajendra Kumar Materials (Basel) Article (1)H and (19)F spin–lattice relaxation studies for 1-ethyl-3-methylimidazolium bis(fluorosulfonyl)imide in bulk and mesoporous MCM-41 silica matrix confinement were performed under varying temperatures in a broad range of magnetic fields, corresponding to (1)H resonance frequency from 5Hz to 30MHz.A thorough analysis of the relaxation data revealed a three-dimensional translation diffusion of the ions in the bulk liquid and two-dimensional diffusion in the vicinity of the confining walls in the confinement. Parameters describing the translation dynamics were determined and compared. The rotational motion of both kinds of ions in the confinement was described by two correlation times that might be attributed to anisotropic reorientation of these species. MDPI 2020-09-30 /pmc/articles/PMC7579494/ /pubmed/33007881 http://dx.doi.org/10.3390/ma13194351 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kruk, Danuta
Wojciechowski, Milosz
Florek-Wojciechowska, Malgorzata
Singh, Rajendra Kumar
Dynamics of Ionic Liquids in Confinement by Means of NMR Relaxometry—EMIM-FSI in a Silica Matrix as an Example
title Dynamics of Ionic Liquids in Confinement by Means of NMR Relaxometry—EMIM-FSI in a Silica Matrix as an Example
title_full Dynamics of Ionic Liquids in Confinement by Means of NMR Relaxometry—EMIM-FSI in a Silica Matrix as an Example
title_fullStr Dynamics of Ionic Liquids in Confinement by Means of NMR Relaxometry—EMIM-FSI in a Silica Matrix as an Example
title_full_unstemmed Dynamics of Ionic Liquids in Confinement by Means of NMR Relaxometry—EMIM-FSI in a Silica Matrix as an Example
title_short Dynamics of Ionic Liquids in Confinement by Means of NMR Relaxometry—EMIM-FSI in a Silica Matrix as an Example
title_sort dynamics of ionic liquids in confinement by means of nmr relaxometry—emim-fsi in a silica matrix as an example
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7579494/
https://www.ncbi.nlm.nih.gov/pubmed/33007881
http://dx.doi.org/10.3390/ma13194351
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