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Investigation of Dynamic Behavior of Confined Ionic Liquid [BMIM](+)[TCM](−) in Silica Material SBA-15 Using NMR
The molecular dynamics of 1-butyl-3-methyl imidazolium tricyanomethanide ionic liquid [BMIM](+)[TCM](−) confined in SBA-15 mesoporous silica were examined using (1)H NMR spin-lattice (T(1)) relaxation and diffusion measurements. An extensive temperature range (100 K–400 K) was considered in order to...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10095388/ https://www.ncbi.nlm.nih.gov/pubmed/37047711 http://dx.doi.org/10.3390/ijms24076739 |
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author | Gkoura, Lydia Panopoulos, Nikolaos Karagianni, Marina Romanos, George Chatzichristos, Aris Papavassiliou, George Hassan, Jamal Fardis, Michael |
author_facet | Gkoura, Lydia Panopoulos, Nikolaos Karagianni, Marina Romanos, George Chatzichristos, Aris Papavassiliou, George Hassan, Jamal Fardis, Michael |
author_sort | Gkoura, Lydia |
collection | PubMed |
description | The molecular dynamics of 1-butyl-3-methyl imidazolium tricyanomethanide ionic liquid [BMIM](+)[TCM](−) confined in SBA-15 mesoporous silica were examined using (1)H NMR spin-lattice (T(1)) relaxation and diffusion measurements. An extensive temperature range (100 K–400 K) was considered in order to study both the liquid and glassy states. The hydrogen dynamics in the two states and the self-diffusion coefficients of the cation [BMIM](+) above the glass transition temperature were extracted from the experimental data. The results were then compared to the corresponding bulk substance. The effects of confinement on the dynamic properties of the ionic liquid clearly manifest themselves in both temperature regimes. In the high-temperature liquid state, the mobility of the confined cations reduces significantly compared to the bulk; interestingly, confinement drives the ionic liquid to the glassy state at a higher temperature T(g) than the bulk ionic liquid, whereas an unusual T(1) temperature dependence is observed in the high-temperature regime, assigned to the interaction of the ionic liquid with the silica-OH species. |
format | Online Article Text |
id | pubmed-10095388 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-100953882023-04-13 Investigation of Dynamic Behavior of Confined Ionic Liquid [BMIM](+)[TCM](−) in Silica Material SBA-15 Using NMR Gkoura, Lydia Panopoulos, Nikolaos Karagianni, Marina Romanos, George Chatzichristos, Aris Papavassiliou, George Hassan, Jamal Fardis, Michael Int J Mol Sci Article The molecular dynamics of 1-butyl-3-methyl imidazolium tricyanomethanide ionic liquid [BMIM](+)[TCM](−) confined in SBA-15 mesoporous silica were examined using (1)H NMR spin-lattice (T(1)) relaxation and diffusion measurements. An extensive temperature range (100 K–400 K) was considered in order to study both the liquid and glassy states. The hydrogen dynamics in the two states and the self-diffusion coefficients of the cation [BMIM](+) above the glass transition temperature were extracted from the experimental data. The results were then compared to the corresponding bulk substance. The effects of confinement on the dynamic properties of the ionic liquid clearly manifest themselves in both temperature regimes. In the high-temperature liquid state, the mobility of the confined cations reduces significantly compared to the bulk; interestingly, confinement drives the ionic liquid to the glassy state at a higher temperature T(g) than the bulk ionic liquid, whereas an unusual T(1) temperature dependence is observed in the high-temperature regime, assigned to the interaction of the ionic liquid with the silica-OH species. MDPI 2023-04-04 /pmc/articles/PMC10095388/ /pubmed/37047711 http://dx.doi.org/10.3390/ijms24076739 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Gkoura, Lydia Panopoulos, Nikolaos Karagianni, Marina Romanos, George Chatzichristos, Aris Papavassiliou, George Hassan, Jamal Fardis, Michael Investigation of Dynamic Behavior of Confined Ionic Liquid [BMIM](+)[TCM](−) in Silica Material SBA-15 Using NMR |
title | Investigation of Dynamic Behavior of Confined Ionic Liquid [BMIM](+)[TCM](−) in Silica Material SBA-15 Using NMR |
title_full | Investigation of Dynamic Behavior of Confined Ionic Liquid [BMIM](+)[TCM](−) in Silica Material SBA-15 Using NMR |
title_fullStr | Investigation of Dynamic Behavior of Confined Ionic Liquid [BMIM](+)[TCM](−) in Silica Material SBA-15 Using NMR |
title_full_unstemmed | Investigation of Dynamic Behavior of Confined Ionic Liquid [BMIM](+)[TCM](−) in Silica Material SBA-15 Using NMR |
title_short | Investigation of Dynamic Behavior of Confined Ionic Liquid [BMIM](+)[TCM](−) in Silica Material SBA-15 Using NMR |
title_sort | investigation of dynamic behavior of confined ionic liquid [bmim](+)[tcm](−) in silica material sba-15 using nmr |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10095388/ https://www.ncbi.nlm.nih.gov/pubmed/37047711 http://dx.doi.org/10.3390/ijms24076739 |
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