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Electron spin dynamics and spin-lattice relaxation of trityl radicals in frozen solutions Full article

Journal Physical Chemistry Chemical Physics
ISSN: 1463-9076 , E-ISSN: 1463-9084
Output data Year: 2016, Volume: 18, Number: 36, Pages: 24954-24965 Pages count : 12 DOI: 10.1039/c6cp02649d
Authors Chen Hanjiao 1 , Maryasov Alexander G. 2 , Rogozhnikova Olga Yu. 3,4 , Trukhin Dmitry V. 3,4 , Tormyshev Victor M. 3,4 , Bowman Michael K. 1
Affiliations
1 (Данные Web of science) Univ Alabama, Dept Chem, Box 870336, Tuscaloosa, AL 35487 USA
2 (Данные Web of science) VV Voevodsky Inst Chem Kinet & Combust, 3 Inst Skaya St, Novosibirsk 630090, Russia
3 (Данные Web of science) NN Vorozhtsov Novosibirsk Inst Organ Chem, 9 Academician Lavrentiev Ave, Novosibirsk 630090, Russia
4 (Данные Web of science) Novosibirsk State Univ, 2 Pirogova St, Novosibirsk 630090, Russia

Abstract: Electron spin-lattice relaxation of two trityl radicals, d(24)-OX063 and Finland trityl, were studied under conditions relevant to their use in dissolution dynamic nuclear polarization (DNP). The dependence of relaxation kinetics on temperature up to 100 K and on concentration up to 60 mM was obtained at X-and W-bands (0.35 and 3.5 Tesla, respectively). The relaxation is quite similar at both bands and for both trityl radicals. At concentrations typical for DNP, relaxation is mediated by excitation transfer and spin-diffusion to fast-relaxing centers identified as triads of trityl radicals that spontaneously form in the frozen samples. These centers relax by an Orbach-Aminov mechanism and determine the relaxation, saturation and electron spin dynamics during DNP.
Cite: Chen H. , Maryasov A.G. , Rogozhnikova O.Y. , Trukhin D.V. , Tormyshev V.M. , Bowman M.K.
Electron spin dynamics and spin-lattice relaxation of trityl radicals in frozen solutions
Physical Chemistry Chemical Physics. 2016. V.18. N36. P.24954-24965. DOI: 10.1039/c6cp02649d WOS Scopus РИНЦ
Files: Full text from publisher
Identifiers:
Web of science WOS:000384249300021
Scopus 2-s2.0-84988024325
Elibrary 27576422
OpenAlex W2513217505
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