Display options
Cite
Tošner Z, Purea A, Struppe JO, et al. Radiofrequency fields in MAS solid state NMR probes. J Magn Reson. 2017;284:20-32doi: 10.1016/j.jmr.2017.09.002.
Tošner, Z., Purea, A., Struppe, J. O., Wegner, S., Engelke, F., Glaser, S. J., & Reif, B. (2017). Radiofrequency fields in MAS solid state NMR probes. Journal of magnetic resonance (San Diego, Calif. : 1997), 28420-32. https://doi.org/10.1016/j.jmr.2017.09.002
Tošner, Zdeněk, et al. "Radiofrequency fields in MAS solid state NMR probes." Journal of magnetic resonance (San Diego, Calif. : 1997) vol. 284 (2017): 20-32. doi: https://doi.org/10.1016/j.jmr.2017.09.002
Tošner Z, Purea A, Struppe JO, Wegner S, Engelke F, Glaser SJ, Reif B. Radiofrequency fields in MAS solid state NMR probes. J Magn Reson. 2017 Nov;284:20-32. doi: 10.1016/j.jmr.2017.09.002. Epub 2017 Sep 06. PMID: 28946058.
Copy Download .nbib Format: NLM
Share it on

J Magn Reson. 2017 Nov;284:20-32. doi: 10.1016/j.jmr.2017.09.002. Epub 2017 Sep 06.

Radiofrequency fields in MAS solid state NMR probes.

Journal of magnetic resonance (San Diego, Calif. : 1997)

Zdeněk Tošner, Armin Purea, Jochem O Struppe, Sebastian Wegner, Frank Engelke, Steffen J Glaser, Bernd Reif

Affiliations

  1. Munich Center for Integrated Protein Science (CIPS-M) at Department of Chemistry, Technical University of Munich, Lichtenbergstr. 4, 85747 Garching, Germany; Department of Chemistry, Technical University of Munich, Lichtenbergstr. 4, 85747 Garching, Germany; Department of Chemistry, Faculty of Science, Charles University, Hlavova 8, 12842 Prague 2, Czech Republic. Electronic address: [email protected].
  2. Bruker BioSpin, Silberstreifen 4, 76287 Rheinstetten, Germany.
  3. Bruker BioSpin, 15 Fortune Dr, Billerica, MA 01821, USA.
  4. Department of Chemistry, Technical University of Munich, Lichtenbergstr. 4, 85747 Garching, Germany.
  5. Munich Center for Integrated Protein Science (CIPS-M) at Department of Chemistry, Technical University of Munich, Lichtenbergstr. 4, 85747 Garching, Germany; Department of Chemistry, Technical University of Munich, Lichtenbergstr. 4, 85747 Garching, Germany; Helmholtz-Zentrum München (HMGU), Deutsches Forschungszentrum für Gesundheit und Umwelt, Ingolstädter Landstr. 1, 85764 Neuherberg, Germany.

PMID: 28946058 DOI: 10.1016/j.jmr.2017.09.002

Abstract

We present a detailed analysis of the radiofrequency (RF) field over full volume of a rotor that is generated in a solenoid coil. On top of the usually considered static distribution of amplitudes along the coil axis we describe dynamic radial RF inhomogeneities induced by sample rotation. During magic angle spinning (MAS), the mechanical rotation of the sample about the magic angle, a spin packet travels through areas of different RF fields and experiences periodical modulations of both the RF amplitude and the phase. These modulations become particularly severe at the end regions of the coil where the relative RF amplitude varies up to ±25% and the RF phase changes within ±30°. Using extensive numerical simulations we demonstrate effects of RF inhomogeneity on pulse calibration and for the ramped CP experiment performed at a wide range of MAS rates. In addition, we review various methods to map RF fields using a B

Copyright © 2017 Elsevier Inc. All rights reserved.

Keywords: Cross-polarization; Magic angle spinning; Nutation experiment; Radiofrequency amplitude and phase modulation; Radiofrequency field inhomogeneity; Solenoid coil; Solid state NMR

Publication Types