Peek Inside the Water Mixtures of Ionic Liquids at Molecular Level: Microscopic Properties Probed by EPR Spectroscopy

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 mixture...

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Autores principales:	Mikhail Yu. Ivanov, Yuliya F. Polienko, Igor A. Kirilyuk, Sergey A. Prikhod’ko, Nicolay Yu. Adonin, Matvey V. Fedin
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	ionic liquids EPR spectroscopy nanostructure emulsions green chemistry Biology (General) QH301-705.5 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/a81808d6043745a79d52bec161e479ad
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spelling	oai:doaj.org-article:a81808d6043745a79d52bec161e479ad2021-11-11T17:19:17ZPeek Inside the Water Mixtures of Ionic Liquids at Molecular Level: Microscopic Properties Probed by EPR Spectroscopy10.3390/ijms2221119001422-00671661-6596https://doaj.org/article/a81808d6043745a79d52bec161e479ad2021-11-01T00:00:00Zhttps://www.mdpi.com/1422-0067/22/21/11900https://doaj.org/toc/1661-6596https://doaj.org/toc/1422-0067Many 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]BF<sub>4</sub> 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.Mikhail Yu. IvanovYuliya F. PolienkoIgor A. KirilyukSergey A. Prikhod’koNicolay Yu. AdoninMatvey V. FedinMDPI AGarticleionic liquidsEPR spectroscopynanostructureemulsionsgreen chemistryBiology (General)QH301-705.5ChemistryQD1-999ENInternational Journal of Molecular Sciences, Vol 22, Iss 11900, p 11900 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ionic liquids EPR spectroscopy nanostructure emulsions green chemistry Biology (General) QH301-705.5 Chemistry QD1-999
spellingShingle	ionic liquids EPR spectroscopy nanostructure emulsions green chemistry Biology (General) QH301-705.5 Chemistry QD1-999 Mikhail Yu. Ivanov Yuliya F. Polienko Igor A. Kirilyuk Sergey A. Prikhod’ko Nicolay Yu. Adonin Matvey V. Fedin Peek Inside the Water Mixtures of Ionic Liquids at Molecular Level: Microscopic Properties Probed by EPR Spectroscopy
description	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]BF<sub>4</sub> 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.
format	article
author	Mikhail Yu. Ivanov Yuliya F. Polienko Igor A. Kirilyuk Sergey A. Prikhod’ko Nicolay Yu. Adonin Matvey V. Fedin
author_facet	Mikhail Yu. Ivanov Yuliya F. Polienko Igor A. Kirilyuk Sergey A. Prikhod’ko Nicolay Yu. Adonin Matvey V. Fedin
author_sort	Mikhail Yu. Ivanov
title	Peek Inside the Water Mixtures of Ionic Liquids at Molecular Level: Microscopic Properties Probed by EPR Spectroscopy
title_short	Peek Inside the Water Mixtures of Ionic Liquids at Molecular Level: Microscopic Properties Probed by EPR Spectroscopy
title_full	Peek Inside the Water Mixtures of Ionic Liquids at Molecular Level: Microscopic Properties Probed by EPR Spectroscopy
title_fullStr	Peek Inside the Water Mixtures of Ionic Liquids at Molecular Level: Microscopic Properties Probed by EPR Spectroscopy
title_full_unstemmed	Peek Inside the Water Mixtures of Ionic Liquids at Molecular Level: Microscopic Properties Probed by EPR Spectroscopy
title_sort	peek inside the water mixtures of ionic liquids at molecular level: microscopic properties probed by epr spectroscopy
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a81808d6043745a79d52bec161e479ad
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Peek Inside the Water Mixtures of Ionic Liquids at Molecular Level: Microscopic Properties Probed by EPR Spectroscopy

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