Triarylmethyl Radicals: An EPR Study of C-13 Hyperfine Coupling Constants

Triarylmethyl Radicals: An EPR Study of C-13 Hyperfine Coupling Constants Full article

Journal

Zeitschrift fur Physikalische Chemie -INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS
ISSN: 0942-9352 , E-ISSN: 1865-7117

Output data

Year: 2017, Volume: 231, Number: 4, Pages: 777-794 Pages count : 18 DOI: 10.1515/zpch-2016-0811

Tags

triarylmethyl radical

Authors

Kuzhelev Andrey A. ¹ , Tormyshev Victor M. ^1,2 , Rogozhnikova Olga Yu. ¹ , Trukhin Dmitry V. ¹ , Troitskaya Tatiana I. ¹ , Strizhakov Rodion K. ¹ , Krumkacheva Olesya A. ^2,3 , Fedin Matvey V. ³ , Bagryanskaya Elena G. ^1,2

Affiliations

1	(Данные Web of science) RAS, NN Vorozhtsov Novosibirsk Inst Organ Chem, SB, Novosibirsk 630090, Russia
2	(Данные Web of science) Novosibirsk State Univ, Novosibirsk 630090, Russia
3	(Данные Web of science) RAS, Int Tomog Ctr, SB, Novosibirsk 630090, Russia

Triarylmethyl (TAM) radicals are widely used in electron paramagnetic resonance (EPR) spectroscopy as spin labels and in EPR imaging as spin probes for in vivo oxymetry. One of the key advantages of TAMs is the extremely narrow EPR line, especially in case of deuterated analogs (-2.5 mu T). Another advantage is their slow spin relaxation even at physiological temperatures; in particular, this characteristic enables the use of pulsed dipolar EPR methods for distance measurements in biomolecules. In this study, a large series of TAM radicals and their deuterated analogs was synthesized, and the corresponding spectroscopic parameters including C-13 hyperfine constants were determined for the first time. We observed negligible dependence of C-13 hyperfine constants on the solvent or on the structure or number of substituents at para-C atoms of the aromatic rings. In addition, we demonstrated that C-13 signals at natural abundance can be used for successful distance measurements at room temperature by pulsed electron double resonance (PELDOR or DEER).

Kuzhelev A.A. , Tormyshev V.M. , Rogozhnikova O.Y. , Trukhin D.V. , Troitskaya T.I. , Strizhakov R.K. , Krumkacheva O.A. , Fedin M.V. , Bagryanskaya E.G.
Triarylmethyl Radicals: An EPR Study of C-13 Hyperfine Coupling Constants

Zeitschrift fur Physikalische Chemie -INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS. 2017. V.231. N4. P.777-794. DOI: 10.1515/zpch-2016-0811 WOS Scopus РИНЦ OpenAlex

Full text from publisher

Published online:	Oct 5, 2016
Published print:	Jan 1, 2017

Web of science:	WOS:000394164200005
Scopus:	2-s2.0-85012298696
Elibrary:	29491959
OpenAlex:	W2566759609

DB	Citing
Web of science	27
Scopus	26
Elibrary	24
OpenAlex	26