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10.3390/molecules26195828
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Communication

Validation of Structural Grounds for Anomalous Molecular Mobility in Ionic Liquid Glasses

by
Mikhail Yu. Ivanov
1,*,
Sergey A. Prikhod’ko
2,
Olga D. Bakulina
1,
Alexey S. Kiryutin
1,
Nicolay Yu. Adonin
2 and
Matvey V. Fedin
1,*
1
International Tomography Center SB RAS, Institutskaya Street 3a, 630090 Novosibirsk, Russia
2
Boreskov Institute of Catalysis SB RAS, Lavrentiev Avenue 5, 630090 Novosibirsk, Russia
*
Authors to whom correspondence should be addressed.
Molecules 2021, 26(19), 5828; https://doi.org/10.3390/molecules26195828
Submission received: 18 August 2021 / Revised: 21 September 2021 / Accepted: 23 September 2021 / Published: 26 September 2021
(This article belongs to the Special Issue Spectroscopic and Spectrometric Techniques for Structural Analysis)
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Abstract

Ionic liquid (IL) glasses have recently drawn much interest as unusual media with unique physicochemical properties. In particular, anomalous suppression of molecular mobility in imidazolium IL glasses vs. increasing temperature was evidenced by pulse Electron Paramagnetic Resonance (EPR) spectroscopy. Although such behavior has been proven to originate from dynamics of alkyl chains of IL cations, the role of electron spin relaxation induced by surrounding protons still remains unclear. In this work we synthesized two deuterated imidazolium-based ILs to reduce electron–nuclear couplings between radical probe and alkyl chains of IL, and investigated molecular mobility in these glasses. The obtained trends were found closely similar for deuterated and protonated analogs, thus excluding the relaxation-induced artifacts and reliably demonstrating structural grounds of the observed anomalies in heterogeneous IL glasses.
Keywords: ionic liquids; glasses; molecular mobility; spin probe; deuteration effect; nanostructure ionic liquids; glasses; molecular mobility; spin probe; deuteration effect; nanostructure
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MDPI and ACS Style

Ivanov, M.Y.; Prikhod’ko, S.A.; Bakulina, O.D.; Kiryutin, A.S.; Adonin, N.Y.; Fedin, M.V. Validation of Structural Grounds for Anomalous Molecular Mobility in Ionic Liquid Glasses. Molecules 2021, 26, 5828. https://doi.org/10.3390/molecules26195828

AMA Style

Ivanov MY, Prikhod’ko SA, Bakulina OD, Kiryutin AS, Adonin NY, Fedin MV. Validation of Structural Grounds for Anomalous Molecular Mobility in Ionic Liquid Glasses. Molecules. 2021; 26(19):5828. https://doi.org/10.3390/molecules26195828

Chicago/Turabian Style

Ivanov, Mikhail Yu., Sergey A. Prikhod’ko, Olga D. Bakulina, Alexey S. Kiryutin, Nicolay Yu. Adonin, and Matvey V. Fedin. 2021. "Validation of Structural Grounds for Anomalous Molecular Mobility in Ionic Liquid Glasses" Molecules 26, no. 19: 5828. https://doi.org/10.3390/molecules26195828

APA Style

Ivanov, M. Y., Prikhod’ko, S. A., Bakulina, O. D., Kiryutin, A. S., Adonin, N. Y., & Fedin, M. V. (2021). Validation of Structural Grounds for Anomalous Molecular Mobility in Ionic Liquid Glasses. Molecules, 26(19), 5828. https://doi.org/10.3390/molecules26195828

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