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Broadband MAS NMR spectroscopy in the low-power limit
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
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Number of Authors: 52018 (English)In: Chemical Physics Letters, ISSN 0009-2614, E-ISSN 1873-4448, Vol. 697, p. 29-37Article in journal (Refereed) Published
Abstract [en]

We investigate the performance of broadband adiabatic inversion pulses in the high-power (short high-powered adiabatic pulse, SHAP) and low-power (single-sideband-selective adiabatic pulse, S(3)AP) RF regimes on a spin system subjected to large anisotropic interactions. We show by combined experimental results and spin dynamics simulations that when the magic-angle spinning rate exceeds 100 kHz S(3)APs begin outperforming SHAPs. This is especially true for low-gamma nuclei, such as Li-6 in paramagnetic Li-ion battery materials. Finally, we show how S3APs can be improved by combining multiple waveforms sweeping over multiple sidebands simultaneously, in order to produce inverted sideband profiles free from intensity biasing.

Place, publisher, year, edition, pages
2018. Vol. 697, p. 29-37
Keywords [en]
Adiabatic pulses, Ultrafast MAS, Paramagnetic NMR, Broadband NMR, Li-ion battery
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-154695DOI: 10.1016/j.cplett.2018.01.028ISI: 000427454000006OAI: oai:DiVA.org:su-154695DiVA, id: diva2:1198147
Available from: 2018-04-16 Created: 2018-04-16 Last updated: 2018-04-16Bibliographically approved

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Pell, Andrew J.
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