Articles | Volume 1, issue 1
https://doi.org/10.5194/mr-1-13-2020
https://doi.org/10.5194/mr-1-13-2020
Research article
 | 
19 Feb 2020
Research article |  | 19 Feb 2020

Origin of the residual line width under frequency-switched Lee–Goldburg decoupling in MAS solid-state NMR

Johannes Hellwagner, Liam Grunwald, Manuel Ochsner, Daniel Zindel, Beat H. Meier, and Matthias Ernst

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Cited articles

Agarwal, V., Penzel, S., Szekely, K., Cadalbert, R., Testori, E., Oss, A., Past, J., Samoson, A., Ernst, M., Böckmann, A., and Meier, B. H.: DeNovo 3-D Structure Determination from Sub-milligram Protein Samples by Solid-State 100 kHz MAS NMR Spectroscopy, Angew. Chem. Int. Ed., 53, 12253–12256, https://doi.org/10.1002/anie.201405730, 2014. 
Andreas, L. B., Jaudzems, K., Stanek, J., Lalli, D., Bertarello, A., Le Marchand, T., Cala-De Paepe, D., Kotelovica, S., Akopjana, I., Knott, B., Wegner, S., Engelke, F., Lesage, A., Emsley, L., Tars, K., Herrmann, T., and Pintacuda, G.: Structure of fully protonated proteins by proton-detected magic-angle spinning NMR, P. Natl. Acad. Sci. USA, 113, 9187–9192, https://doi.org/10.1073/pnas.1602248113, 2016. 
Barbara, T. M., Martin, J. F., and Wurl, J. G.: Phase transients in NMR probe circuits, J. Magn. Reson., 93, 497–508, https://doi.org/10.1016/0022-2364(91)90078-8, 1991. 
Barfield, M.: Structural dependencies of interresidue scalar coupling h3JNC' and donor 1H chemical shifts in the hydrogen bonding regions of proteins, J. Am. Chem. Soc., 124, 4158–4168, https://doi.org/10.1021/ja012674v, 2002. 
Berglund, B. and Vaughan, R. W.: Correlations between proton chemical shift tensors, deuterium quadrupole couplings, and bond distances for hydrogen bonds in solids, J. Chem. Phys., 73, 2037–2043, https://doi.org/10.1063/1.440423, 1980. 
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Short summary
This paper analyzes a commonly used line-narrowing mechanism (homonuclear decoupling) in solid-state NMR and discusses what limits the achievable line width. Based on theoretical considerations, the contribution of different effects to the line width is discussed and a new contributing term is identified. This research allows us to evaluate new ways to improve the line width in such homonuclear decoupled spectra.