Low-temperature molecular motions in a deep eutectic solvent choline chloride/urea studied by spin-probe EPR

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Low-temperature molecular motions in a deep eutectic solvent choline chloride/urea studied by spin-probe EPR. / Golysheva, E. A.; Dzuba, S. A.

In: Russian Chemical Bulletin, Vol. 70, No. 12, 12.2021, p. 2366-2369.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{658515e9a9fa4934b38be13cc649e14a,

title = "Low-temperature molecular motions in a deep eutectic solvent choline chloride/urea studied by spin-probe EPR",

abstract = "Deep eutectic solvents (DESs) are eutectic mixtures of substances with the melting points considerably lower than those for their individual components. The study of various properties of DESs is currently attracting great attention due to the possibilities of their use as solvents in a wide variety of technological fields. In this work, it is shown using a choline chloride/urea mixture (1:2) that the method of pulsed spin-probe EPR can be used to study low-temperature stochastic molecular librations in DESs. A peculiarity of this type of motion is its sensitivity to the nanostructure of the substance under study. The studies carried out in this work showed that the choline chloride/urea mixture (1:2) exhibits a glass transition considerably broadened in temperature and starting below macroscopic glass transition. This broadening indicates that its nanostructure is rather loosely packed.",

keywords = "choline chloride/urea, electron spin echo, glass transition, nitroxyl radicals, stochastic molecular librations",

author = "Golysheva, {E. A.} and Dzuba, {S. A.}",

note = "Funding Information: The work was financially supported by the Russian Foundation for Basic Research (Project No. 19-33-90027). Publisher Copyright: {\textcopyright} 2021, Springer Science+Business Media LLC.",

year = "2021",

month = dec,

doi = "10.1007/s11172-021-3354-5",

language = "English",

volume = "70",

pages = "2366--2369",

journal = "Russian Chemical Bulletin",

issn = "1066-5285",

publisher = "Springer Nature",

number = "12",

}

RIS

TY - JOUR

T1 - Low-temperature molecular motions in a deep eutectic solvent choline chloride/urea studied by spin-probe EPR

AU - Golysheva, E. A.

AU - Dzuba, S. A.

PY - 2021/12

Y1 - 2021/12

N2 - Deep eutectic solvents (DESs) are eutectic mixtures of substances with the melting points considerably lower than those for their individual components. The study of various properties of DESs is currently attracting great attention due to the possibilities of their use as solvents in a wide variety of technological fields. In this work, it is shown using a choline chloride/urea mixture (1:2) that the method of pulsed spin-probe EPR can be used to study low-temperature stochastic molecular librations in DESs. A peculiarity of this type of motion is its sensitivity to the nanostructure of the substance under study. The studies carried out in this work showed that the choline chloride/urea mixture (1:2) exhibits a glass transition considerably broadened in temperature and starting below macroscopic glass transition. This broadening indicates that its nanostructure is rather loosely packed.

AB - Deep eutectic solvents (DESs) are eutectic mixtures of substances with the melting points considerably lower than those for their individual components. The study of various properties of DESs is currently attracting great attention due to the possibilities of their use as solvents in a wide variety of technological fields. In this work, it is shown using a choline chloride/urea mixture (1:2) that the method of pulsed spin-probe EPR can be used to study low-temperature stochastic molecular librations in DESs. A peculiarity of this type of motion is its sensitivity to the nanostructure of the substance under study. The studies carried out in this work showed that the choline chloride/urea mixture (1:2) exhibits a glass transition considerably broadened in temperature and starting below macroscopic glass transition. This broadening indicates that its nanostructure is rather loosely packed.

KW - choline chloride/urea

KW - electron spin echo

KW - glass transition

KW - nitroxyl radicals

KW - stochastic molecular librations

UR - http://www.scopus.com/inward/record.url?scp=85123550516&partnerID=8YFLogxK

U2 - 10.1007/s11172-021-3354-5

DO - 10.1007/s11172-021-3354-5

M3 - Article

AN - SCOPUS:85123550516

VL - 70

SP - 2366

EP - 2369

JO - Russian Chemical Bulletin

JF - Russian Chemical Bulletin

SN - 1066-5285

IS - 12

ER -

ID: 35385408