Structural Anomalies in Ionic Liquids near the Glass Transition Revealed by Pulse EPR | Sciact - CRIS-система Института катализа

Structural Anomalies in Ionic Liquids near the Glass Transition Revealed by Pulse EPR Научная публикация

Журнал

Journal of Physical Chemistry Letters
ISSN: 1948-7185

Вых. Данные

Год: 2018, Том: 9, Страницы: 4607-4612 Страниц : 6 DOI: 10.1021/acs.jpclett.8b02097

Ключевые слова

Electron spin resonance spectroscopy Glass Ionic liquids Molecular dynamics Paramagnetic resonance Stereochemistry

Авторы

Ivanov Mikhail Yu. ^1,2 , Prikhod'ko Sergey A. ³ , Adonin Nicolay Yu. ³ , Kirilyuk Igor A. ⁴ , Adichtchev Sergey V. ⁵ , Surovtsev Nikolay V. ⁵ , Dzuba Sergei A. ⁶ , Fedin Matvey V. ^1,2

Организации

1	International Tomography Center SB RAS, Institutskaya Street 3a, 630090 Novosibirsk, Russia
2	Novosibirsk State University, Pirogova Street 2, 630090 Novosibirsk, Russia
3	Boreskov Institute of Catalysis SB RAS, Lavrentiev Avenue 5, 630090 Novosibirsk, Russia
4	N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, Lavrentiev Avenue 9, 630090 Novosibirsk, Russia
5	Institute of Automation and Electrometry SB RAS, Koptyug Avenue 1, 630090 Novosibirsk, Russia
6	Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya Street 3, 630090 Novosibirsk, Russia

Информация о финансировании (2)

1	Российский научный фонд	14-13-00826
2	Федеральное агентство научных организаций России	0333-2017-0002

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.

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 CAPlusCA PMID

Поступила в редакцию:	4 июл. 2018 г.
Принята к публикации:	27 июл. 2018 г.
Опубликована online:	27 июл. 2018 г.
Опубликована в печати:	16 авг. 2018 г.

≡ Web of science:	WOS:000442446900022
≡ Scopus:	2-s2.0-85051137186
≡ РИНЦ:	35732483
≡ OpenAlex:	W2884948680
≡ Chemical Abstracts:	2018:1401962
≡ Chemical Abstracts (print):	169:242516
≡ PMID (PubMed):	30052047

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≡ Scopus	37	Сбор данных от 15.02.2026
≡ РИНЦ	40	Сбор данных от 15.02.2026
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