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Radical-Induced Low-Field 1H Relaxation in Solid Pyruvic Acid Doped with Trityl-OX063

Jurkutat, Michael; Kouřilová, Hana; Peat, David; Kouřil, Karel; Khan, Alixander S.; Horsewill, Anthony J.; MacDonald, James F.; Owers-Bradley, John; Meier, Benno


Michael Jurkutat

Hana Kouřilová

David Peat

Karel Kouřil

Alixander S. Khan

Anthony J. Horsewill

John Owers-Bradley

Benno Meier


In dynamic nuclear polarization (DNP), radicals such as trityl provide a source for high nuclear spin polarization. Conversely, during the low-field transfer of hyperpolarized solids, the radicals’ dipolar or Non-Zeeman reservoir may act as a powerful nuclear polarization sink. Here, we report the low-temperature proton spin relaxation in pyruvic acid doped with trityl, for fields from 5 mT to 2 T. We estimate the heat capacity of the radical Non-Zeeman reservoir experimentally and show that a recent formalism by Wenckebach yields a parameter-free, yet quantitative model for the entire field range.


Jurkutat, M., Kouřilová, H., Peat, D., Kouřil, K., Khan, A. S., Horsewill, A. J., …Meier, B. (2022). Radical-Induced Low-Field 1H Relaxation in Solid Pyruvic Acid Doped with Trityl-OX063. Journal of Physical Chemistry Letters, 13(44), 10370-10376.

Journal Article Type Article
Acceptance Date Sep 30, 2022
Online Publication Date Oct 31, 2022
Publication Date Nov 10, 2022
Deposit Date Dec 15, 2022
Publicly Available Date Dec 15, 2022
Journal Journal of Physical Chemistry Letters
Electronic ISSN 1948-7185
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 13
Issue 44
Pages 10370-10376
Keywords General Materials Science, Physical and Theoretical Chemistry
Public URL
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