Hyperfine Interactions of Narrow-Line Trityl Radical with Solvent Molecules | Sciact - CRIS-система Института катализа

Hyperfine Interactions of Narrow-Line Trityl Radical with Solvent Molecules Научная публикация

Журнал

Journal of Magnetic Resonance
ISSN: 1090-7807 , E-ISSN: 1096-0856

Вых. Данные

Год: 2013, Том: 233, Страницы: 29 - 36 Страниц : 8 DOI: 10.1016/j.jmr.2013.04.017

Ключевые слова

DNP, ENDOR, Trityl radical

Авторы

Trukhan S.N. ^1,2 , Yudanov V.F. ¹ , Tormyshev V.M. ^2,3 , Rogozhnikova O.Yu. ³ , Trukhin D.V. ³ , Bowman M.K. ⁴ , Krzyaniak M.D. ⁴ , Chen H. ⁴ , Martyanov O.N. ¹

Организации

1	Boreskov Institute of Catalysis, pr. Ak. Lavrentieva, 5, Novosibirsk 630090, Russia
2	Department of Natural Sciences, Novosibirsk State University, 2 Pirogov St., Novosibirsk 630090, Russia
3	Vorozhtsov Novosibirsk Institute of Organic Chemistry, pr. Ak. Lavrentieva, 9, Novosibirsk 630090, Russia
4	Chemistry Department, The University of Alabama, Box 870336, Tuscaloosa, AL 35487-0336, USA

Информация о финансировании (4)

1	Российский фонд фундаментальных исследований	13-04-00680
2	National Science Foundation	CHE-0079498
3	National Science Foundation	CHE-0342921
4	National Institute of Biomedical Imaging and Bioengineering	5P41EB002034

The electron nuclear dipolar interactions responsible for some dynamic nuclear polarization (DNP) mechanisms also are responsible for the presence formally in CW EPR spectra of forbidden satellite lines in which both the electron spin and a nuclear spin flip. Such lines arising from 1H nuclei are easily resolved in CW EPR measurements of trityl radicals, a popular family of DNP reagents. The satellite lines overlap some of the hyperfine features from 13C in natural abundance in the trityl radical, but their intensity can be easily determined by simple simulations of the EPR spectra using the hyperfine parameters of the trityl radical. Isotopic substitution of 2H for 1H among the hydrogens of the trityl radical and/or the solvent allows the dipolar interactions from the 1H on the trityl radical and from the solvent to be determined. The intensity of the dipolar interactions, integrated over all the 1H in the system, is characterized by the traditional parameter called reff. For the so-called Finland trityl in methanol, the reff values indicate that collectively the 1H in the unlabeled solvent have a stronger integrated dipolar interaction with the unpaired electron spin of the Finland trityl than do the 1H in the radical and consequently will be a more important DNP route. Although reff has the dimensions of distance, it does not correspond to any simple physical dimension in the trityl radical because the details of the unpaired electron spin distribution and the hydrogen distribution are important in the case of trityls.

Trukhan S.N. , Yudanov V.F. , Tormyshev V.M. , Rogozhnikova O.Y. , Trukhin D.V. , Bowman M.K. , Krzyaniak M.D. , Chen H. , Martyanov O.N.
Hyperfine Interactions of Narrow-Line Trityl Radical with Solvent Molecules

Journal of Magnetic Resonance. 2013. V.233. P.29 - 36. DOI: 10.1016/j.jmr.2013.04.017 WOS Scopus РИНЦ CAPlusCA PMID OpenAlex

Полный текст от издателя

Поступила в редакцию:	28 мар. 2013 г.
Опубликована online:	9 мая 2013 г.
Опубликована в печати:	1 авг. 2013 г.

Web of science:	WOS:000322209600004
Scopus:	2-s2.0-84878258259
РИНЦ:	21467850
Chemical Abstracts:	2013:1105758
Chemical Abstracts (print):	160:333312
PMID (PubMed):	23722184
OpenAlex:	W2015909174

БД	Цитирований
Web of science	42
Scopus	44
РИНЦ	41
OpenAlex	47