Peek Inside the Water Mixtures of Ionic Liquids at Molecular Level: Microscopic Properties Probed by EPR Spectroscopy Full article
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International Journal of Molecular Sciences
ISSN: 1422-0067 , E-ISSN: 1661-6596 |
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| Output data | Year: 2021, Volume: 22, Number: 21, Article number : 11900, Pages count : 9 DOI: 10.3390/ijms222111900 | ||||||||
| Tags | ionic liquids; EPR spectroscopy; nanostructure; emulsions; green chemistry | ||||||||
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| Affiliations |
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Funding (1)
| 1 | Russian Science Foundation | 19-13-00071 |
Abstract:
Many ionic liquids (ILs) can be mixed with water, forming either true solutions or emulsions. This favors their applications in many respects, but at the same time might strongly alter their physicochemical properties. A number of methods exist for studying the macroscopic properties of such mixtures, whereas understanding their characteristics at micro/nanoscale is rather challenging. In this work we investigate microscopic properties, such as viscosity and local structuring, in binary water mixtures of IL [Bmim]BF4 in liquid and glassy states. For this sake, we use continuous wave and pulse electron paramagnetic resonance (EPR) spectroscopy with dedicated spin probes, located preferably in IL-rich domains or distributed in IL- and water-rich domains. We demonstrate that the glassy-state nanostructuring of IL-rich domains is very similar to that in neat ILs. At the same time, in liquid state the residual water makes local viscosity in IL-rich domains noticeably different compared to neat ILs, even though the overwhelming amount of water is contained in water-rich domains. These results have to be taken into account in various applications of IL-water mixtures, especially in those cases demanding the combinations of optimum micro- and macroscopic characteristics.
Cite:
Ivanov M.Y.
, Polienko Y.F.
, Kirilyuk I.A.
, Prikhod’ko S.A.
, Adonin N.Y.
, Fedin M.V.
Peek Inside the Water Mixtures of Ionic Liquids at Molecular Level: Microscopic Properties Probed by EPR Spectroscopy
International Journal of Molecular Sciences. 2021. V.22. N21. 11900 :1-9. DOI: 10.3390/ijms222111900 WOS Scopus РИНЦ ANCAN PMID OpenAlex
Peek Inside the Water Mixtures of Ionic Liquids at Molecular Level: Microscopic Properties Probed by EPR Spectroscopy
International Journal of Molecular Sciences. 2021. V.22. N21. 11900 :1-9. DOI: 10.3390/ijms222111900 WOS Scopus РИНЦ ANCAN PMID OpenAlex
Dates:
| Submitted: | Oct 12, 2021 |
| Accepted: | Oct 29, 2021 |
| Published print: | Nov 2, 2021 |
| Published online: | Nov 2, 2021 |
Identifiers:
| Web of science: | WOS:000721530100001 |
| Scopus: | 2-s2.0-85118251100 |
| Elibrary: | 47519102 |
| Chemical Abstracts: | 2021:2516468 |
| Chemical Abstracts (print): | 177:125043 |
| PMID: | 34769336 |
| OpenAlex: | W3208287408 |