Magnetic Resonance
Magnetic Resonance
MR
Articles | Volume 1, issue 2
Articles | Volume 1, issue 2
https://doi.org/10.5194/mr-1-237-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/mr-1-237-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 1, issue 2
Research article
 | 
14 Oct 2020
Research article |  | 14 Oct 2020

Surprising absence of strong homonuclear coupling at low magnetic field explored by two-field nuclear magnetic resonance spectroscopy

Ivan V. Zhukov, Alexey S. Kiryutin, Ziqing Wang, Milan Zachrdla, Alexandra V. Yurkovskaya, Konstantin L. Ivanov, and Fabien Ferrage

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Cited articles

Appelt, S., Häsing, F. W., Sieling, U., Gordji-Nejad, A., Glöggler, S., and Blümich, B.: Paths from Weak to Strong Coupling in NMR, Phys. Rev. A, 81, 023420, https://doi.org/10.1103/PhysRevA.81.023420, 2010. 
Blanchard, J. W. and Budker, D.: Zero- to Ultralow-Field NMR, eMagRes, 5, 1395–1409, https://doi.org/10.1002/9780470034590.emrstm1369, 2016. 
Bodenhausen, G., Freeman, R., Morris, G. A., and Turner, D. L.: Proton-Coupled Carbon-13 J Spectra in the Presence of Strong Coupling. II, J. Magn. Reson., 28, 17–28, https://doi.org/10.1016/0022-2364(77)90252-9, 1977. 
Bolik-Coulon, N., Kaderavek, P., Pelupessy, P., Dumez, J. N., Ferrage, F., and Cousin, S. F.: Theoretical and Computational Framework for the Analysis of the Relaxation Properties of Arbitrary Spin Systems. Application to High-Resolution Relaxometry, J. Magn. Reson., 313, 106718, https://doi.org/10.1016/j.jmr.2020.106718, 2020. 
Braunschweiler, L. and Ernst, R. R.: Coherence Transfer by Isotropic Mixing – Application to Proton Correlation Spectroscopy, J. Magn. Reson., 53, 521–528, https://doi.org/10.1016/0022-2364(83)90226-3, 1983. 
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We studied spin dynamics in nuclear spin systems at low magnetic fields, where strong coupling among nuclear spins of the same kind, here 13C, is expected. Such conditions are known to be favorable for coherent polarization transfer. However, to our surprise, interactions with other nuclei, i.e., protons, lead to a breakdown of the strong coupling conditions. By using a two-field nuclear magnetic resonance approach, we can manipulate low field-spin dynamics and reintroduce strong coupling.
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