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An EPR Study on Highly Stable Nitroxyl-Nitroxyl Biradicals for Dynamic Nuclear Polarization Applications at High Magnetic Fields Научная публикация

Журнал Molecules
, E-ISSN: 1420-3049
Вых. Данные Год: 2023, Том: 28, Номер: 4, Страницы: 1926 Страниц : 1 DOI: 10.3390/molecules28041926
Ключевые слова dynamic nuclear polarization; solid state NMR; EPR; biradicals
Авторы Asanbaeva Nargiz B. 1 , Dobrynin Sergey A. 1 , Morozov Denis A. 1 , Haro-Mares Nadia 2 , Gutmann Torsten 2 , Buntkowsky Gerd 2 , Bagryanskaya Elena G. 1
Организации
1 N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry of Siberian Branch of Russian Academy of Sciences
2 TU Darmstadt, Eduard-Zintl-Institute for Inorganic and Physical Chemistry

Реферат: Nitroxide biradicals are efficient polarizing agents in dynamic nuclear polarization (DNP) solid-state nuclear magnetic resonance. Many recently reported radicals possess substantial DNP efficiency in organic solvents but have poor solubility in water media which is unfavorable for biological applications. In this paper, we report DNP efficiency at a high magnetic field for two water-soluble biradicals resistant to reducing media. Water solubility was achieved by obtaining the radicals in the form of quaternary ammonium salts. Parameters of hyperfine interaction and exchange interaction were quantified by EPR spectroscopy, and their influence on the DNP effect was determined. The resistance of the biradicals to strongly reducing media was characterized. High stability was achieved using tetraethyl substituents and pyrrolidine moieties.
Библиографическая ссылка: Asanbaeva N.B. , Dobrynin S.A. , Morozov D.A. , Haro-Mares N. , Gutmann T. , Buntkowsky G. , Bagryanskaya E.G.
An EPR Study on Highly Stable Nitroxyl-Nitroxyl Biradicals for Dynamic Nuclear Polarization Applications at High Magnetic Fields
Molecules. 2023. V.28. N4. P.1926. DOI: 10.3390/molecules28041926 WOS Scopus РИНЦ OpenAlex
Даты:
Поступила в редакцию: 2 февр. 2023 г.
Принята к публикации: 15 февр. 2023 г.
Опубликована в печати: 17 февр. 2023 г.
Идентификаторы БД:
Web of science: WOS:000939993200001
Scopus: 2-s2.0-85149053613
РИНЦ: 60719654
OpenAlex: W4321375651
Цитирование в БД:
БД Цитирований
OpenAlex 6
Web of science 3
Scopus 3
Альметрики: