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

[Image: see text] 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. Her...

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Autores principales: Jurkutat, Michael, Kouřilová, Hana, Peat, David, Kouřil, Karel, Khan, Alixander S., Horsewill, Anthony J., MacDonald, James F., Owers-Bradley, John, Meier, Benno
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9661535/
https://www.ncbi.nlm.nih.gov/pubmed/36316011
http://dx.doi.org/10.1021/acs.jpclett.2c02357
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author Jurkutat, Michael
Kouřilová, Hana
Peat, David
Kouřil, Karel
Khan, Alixander S.
Horsewill, Anthony J.
MacDonald, James F.
Owers-Bradley, John
Meier, Benno
author_facet Jurkutat, Michael
Kouřilová, Hana
Peat, David
Kouřil, Karel
Khan, Alixander S.
Horsewill, Anthony J.
MacDonald, James F.
Owers-Bradley, John
Meier, Benno
author_sort Jurkutat, Michael
collection PubMed
description [Image: see text] 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.
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spelling pubmed-96615352022-11-15 Radical-Induced Low-Field (1)H 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 J Phys Chem Lett [Image: see text] 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. American Chemical Society 2022-10-31 2022-11-10 /pmc/articles/PMC9661535/ /pubmed/36316011 http://dx.doi.org/10.1021/acs.jpclett.2c02357 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Jurkutat, Michael
Kouřilová, Hana
Peat, David
Kouřil, Karel
Khan, Alixander S.
Horsewill, Anthony J.
MacDonald, James F.
Owers-Bradley, John
Meier, Benno
Radical-Induced Low-Field (1)H Relaxation in Solid Pyruvic Acid Doped with Trityl-OX063
title Radical-Induced Low-Field (1)H Relaxation in Solid Pyruvic Acid Doped with Trityl-OX063
title_full Radical-Induced Low-Field (1)H Relaxation in Solid Pyruvic Acid Doped with Trityl-OX063
title_fullStr Radical-Induced Low-Field (1)H Relaxation in Solid Pyruvic Acid Doped with Trityl-OX063
title_full_unstemmed Radical-Induced Low-Field (1)H Relaxation in Solid Pyruvic Acid Doped with Trityl-OX063
title_short Radical-Induced Low-Field (1)H Relaxation in Solid Pyruvic Acid Doped with Trityl-OX063
title_sort radical-induced low-field (1)h relaxation in solid pyruvic acid doped with trityl-ox063
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9661535/
https://www.ncbi.nlm.nih.gov/pubmed/36316011
http://dx.doi.org/10.1021/acs.jpclett.2c02357
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