Magnetic Resonance
Magnetic Resonance
MR
Articles | Volume 3, issue 2
Articles | Volume 3, issue 2
https://doi.org/10.5194/mr-3-161-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/mr-3-161-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 3, issue 2
Research article
 | 
10 Aug 2022
Research article |  | 10 Aug 2022

Reverse dynamic nuclear polarisation for indirect detection of nuclear spins close to unpaired electrons

Nino Wili, Jan Henrik Ardenkjær-Larsen, and Gunnar Jeschke

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Cited articles

Bornet, A., Milani, J., Vuichoud, B., Perez Linde, A. J., Bodenhausen, G., and Jannin, S.: Microwave frequency modulation to enhance Dissolution Dynamic Nuclear Polarization, Chem. Phys. Lett., 602, 63–67, https://doi.org/10.1016/j.cplett.2014.04.013, 2014. a
Can, T. V., Walish, J. J., Swager, T. M., and Griffin, R. G.: Time domain DNP with the NOVEL sequence, J. Chem. Phys., 143, 054201, https://doi.org/10.1063/1.4927087, 2015. a
Can, T. V., Weber, R. T., Walish, J. J., Swager, T. M., and Griffin, R. G.: Ramped-amplitude NOVEL, J. Chem. Phys., 146, 154204, https://doi.org/10.1063/1.4980155, 2017. a
Chen, H., Maryasov, A. G., Rogozhnikova, O. Y., Trukhin, D. V., Tormyshev, V. M., and Bowman, M. K.: Electron spin dynamics and spin–lattice relaxation of trityl radicals in frozen solutions, Phys. Chem. Chem. Phys., 18, 24954–24965, https://doi.org/10.1039/C6CP02649D, 2016. a
Doll, A. and Jeschke, G.: Wideband frequency-swept excitation in pulsed EPR spectroscopy, J. Magn. Reson., 280, 46–62, https://doi.org/10.1016/j.jmr.2017.01.004, 2017. a, b
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Short summary
Dynamic nuclear polarisation (DNP) transfers polarisation from electron to nuclear spins. This is usually combined with direct detection of the latter. Here, we show that it is possible to reverse the transfer at 1.2 T. This allows us to investigate the spin dynamics of nuclear spins close to electrons – something that is notoriously difficult with established methods. We expect reverse DNP to be useful in the study of spin diffusion or as a building block for more elaborate pulse sequences.
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