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- Title
Validation of Structural Grounds for Anomalous Molecular Mobility in Ionic Liquid Glasses.
- Authors
Ivanov, Mikhail Yu.; Prikhod'ko, Sergey A.; Bakulina, Olga D.; Kiryutin, Alexey S.; Adonin, Nicolay Yu.; Fedin, Matvey V.
- 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.
- Subjects
IONIC mobility; SOLUBLE glass; IONIC liquids; ELECTRON paramagnetic resonance; ELECTRON spin
- Publication
Molecules, 2021, Vol 26, Issue 19, p5828
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules26195828