Magnetic Resonance
Magnetic Resonance
MR
Articles | Volume 2, issue 1
Articles | Volume 2, issue 1
https://doi.org/10.5194/mr-2-523-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/mr-2-523-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 2, issue 1
Research article
 | 
01 Jul 2021
Research article |  | 01 Jul 2021

Effects of radial radio-frequency field inhomogeneity on MAS solid-state NMR experiments

Kathrin Aebischer, Zdeněk Tošner, and Matthias Ernst

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Cited articles

Aebischer, K., Wili, N., Tošner, Z., and Ernst, M.: Using nutation-frequency-selective pulses to reduce radio-frequency field inhomogeneity in solid-state NMR, Magn. Reson., 1, 187–195, https://doi.org/10.5194/mr-1-187-2020, 2020. a, b, c, d
Aebischer, K., Tošner, Z., and Ernst, M.: Effects of radial radio-frequency field inhomogeneity on MAS solid-state NMR experiments, ETH Zurich [data set], https://doi.org/10.3929/ethz-b-000488476, 2021. a
Barnaal, D. and Lowe, I. J.: Effects of Rotating Magnetic Fields on Free-Induction Decay Shapes, Phys. Rev. Lett., 11, 258–260, https://doi.org/10.1103/PhysRevLett.11.258, 1963. a
Bielecki, A., Kolbert, A. C., and Levitt, M. H.: Frequency-switched pulse sequences: homonuclear decoupling and dilute spin NMR in solids, Chem. Phys. Lett., 155, 341–346, 1989. a, b, c
Bielecki, A., Kolbert, A. C., De Groot, H. J. M., Griffin, R. G., and Levitt, M. H.: Frequency-switched Lee–Goldburg sequences in solids, Advances in Magnetic and Optical Resonance, 14, 111–124, 1990. a, b, c
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Short summary
The radio-frequency (rf) field amplitude in solid-state NMR probes changes over the sample volume, i.e. different parts of the sample will experience different nutation frequencies. If the sample is rotated inside the coil as it is typical for magic angle spinning in solid-state NMR, such a position-dependent inhomogeneity leads to an additional time dependence of the rf field amplitude. We show that such time-dependent modulations do not play an important role in many experiments.
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