Structural Anomalies in Ionic Liquids near the Glass Transition Revealed by Pulse EPR Full article
| Journal |
Journal of Physical Chemistry Letters
ISSN: 1948-7185 |
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| Output data | Year: 2018, Volume: 9, Pages: 4607-4612 Pages count : 6 DOI: 10.1021/acs.jpclett.8b02097 | ||||||||||||
| Tags | Electron spin resonance spectroscopy Glass Ionic liquids Molecular dynamics Paramagnetic resonance Stereochemistry | ||||||||||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Science Foundation | 14-13-00826 |
| 2 | Federal Agency for Scientific Organizations | 0333-2017-0002 |
Abstract:
Unusual physical and chemical properties of ionic liquids (ILs) open up prospects for various applications. We report the first observation of density/rigidity heterogeneities in a series of ILs near the glass transition temperature (Tg) by means of pulse electron paramagnetic resonance (EPR). Unprecedented suppression of molecular mobility is evidenced near the glass transition, which is assigned to unusual structural rearrangements of ILs on the nanometer scale. Indeed, pulse and continuous wave EPR clearly indicate the occurrence of heterogeneities near Tg, which exist in a rather broad temperature range of ∼50 K. The two types of local environments are evidenced, being drastically different by their stiffness. The more rigid one suppresses molecular mobility, whereas the softer one instead promotes diffusive molecular rotation. Such properties of ILs near Tg are of general importance; moreover, the observed density/rigidity heterogeneities controlled by temperature might be considered as a new type of tunable reaction nanoenvironment.
Cite:
Ivanov M.Y.
, Prikhod'ko S.A.
, Adonin N.Y.
, Kirilyuk I.A.
, Adichtchev S.V.
, Surovtsev N.V.
, Dzuba S.A.
, Fedin M.V.
Structural Anomalies in Ionic Liquids near the Glass Transition Revealed by Pulse EPR
Journal of Physical Chemistry Letters. 2018. V.9. P.4607-4612. DOI: 10.1021/acs.jpclett.8b02097 WOS Scopus РИНЦ OpenAlex ANCAN PMID
Structural Anomalies in Ionic Liquids near the Glass Transition Revealed by Pulse EPR
Journal of Physical Chemistry Letters. 2018. V.9. P.4607-4612. DOI: 10.1021/acs.jpclett.8b02097 WOS Scopus РИНЦ OpenAlex ANCAN PMID
Dates:
| Submitted: | Jul 4, 2018 |
| Accepted: | Jul 27, 2018 |
| Published online: | Jul 27, 2018 |
| Published print: | Aug 16, 2018 |
Identifiers:
| ≡ Web of science: | WOS:000442446900022 |
| ≡ Scopus: | 2-s2.0-85051137186 |
| ≡ Elibrary: | 35732483 |
| ≡ OpenAlex: | W2884948680 |
| ≡ Chemical Abstracts: | 2018:1401962 |
| ≡ Chemical Abstracts (print): | 169:242516 |
| ≡ PMID: | 30052047 |