Research output: Contribution to journal › Article › peer-review
Radical ionic liquid: An efficient self-probe to study heterogeneous structure in glassy state using EPR spectroscopy. / Yu. Ivanov, Mikhail; Bakulina, Olga D.; Polienko, Yuliya F. et al.
In: Journal of Molecular Liquids, Vol. 381, 121830, 01.07.2023.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Radical ionic liquid: An efficient self-probe to study heterogeneous structure in glassy state using EPR spectroscopy
AU - Yu. Ivanov, Mikhail
AU - Bakulina, Olga D.
AU - Polienko, Yuliya F.
AU - Kirilyuk, Igor A.
AU - Prikhod'ko, Sergey A.
AU - Yu. Adonin, Nicolay
AU - Fedin, Matvey V.
N1 - This work is supported by the Russian Science Foundation (grant No. 19-13-00071-Π). Публикация для корректировки.
PY - 2023/7/1
Y1 - 2023/7/1
N2 - Ionic liquids (ILs) exhibit a number of unique properties, including formation of various heterogeneities in their liquid and glassy states. Electron Paramagnetic Resonance (EPR) spectroscopy has proven informative in studies of such heterogeneous nanostructures; however it employs additional small paramagnetic molecules – spin probes – dissolved in ILs as reporters. In this work we synthesized two radical-ILs, which include integrated paramagnetic fragments in their structures, and employed them in continuous wave (CW) and pulse EPR studies of structural peculiarities in IL glasses. In this approach no external-to-IL spin probe is required. We have shown that the trends observed with radical-ILs are similar to those obtained previously using external-to-IL spin probes. In particular, unusual structural anomalies near glass transition temperatures, which were previously found using external-to-IL spin probes, have been now observed using radical-ILs, thus confirming their genuine origin. In general, radical-ILs can be considered as efficient tools to study heterogeneous structure of ILs using EPR.
AB - Ionic liquids (ILs) exhibit a number of unique properties, including formation of various heterogeneities in their liquid and glassy states. Electron Paramagnetic Resonance (EPR) spectroscopy has proven informative in studies of such heterogeneous nanostructures; however it employs additional small paramagnetic molecules – spin probes – dissolved in ILs as reporters. In this work we synthesized two radical-ILs, which include integrated paramagnetic fragments in their structures, and employed them in continuous wave (CW) and pulse EPR studies of structural peculiarities in IL glasses. In this approach no external-to-IL spin probe is required. We have shown that the trends observed with radical-ILs are similar to those obtained previously using external-to-IL spin probes. In particular, unusual structural anomalies near glass transition temperatures, which were previously found using external-to-IL spin probes, have been now observed using radical-ILs, thus confirming their genuine origin. In general, radical-ILs can be considered as efficient tools to study heterogeneous structure of ILs using EPR.
KW - EPR
KW - Glasses
KW - Ionic liquids
KW - Nanostructuring
KW - Spin probes
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85152452356&origin=inward&txGid=ace59e3fe207f59d7c949b9bbb4aa0a2
UR - https://www.mendeley.com/catalogue/c4fbe739-3f1d-3fff-81e7-554e71b2bcc5/
U2 - 10.1016/j.molliq.2023.121830
DO - 10.1016/j.molliq.2023.121830
M3 - Article
VL - 381
JO - Journal of Molecular Liquids
JF - Journal of Molecular Liquids
SN - 0167-7322
M1 - 121830
ER -
ID: 59256881