The effect of 1H offset and flip-angle on heteronuclear decoupling efficiency in ROSPAC pulsed sequence: A Floquet description
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Date
2023-04-21Type
- Journal Article
ETH Bibliography
yes
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Abstract
A new heteronuclear decoupling sequence for solid-state NMR and magic angle spinning faster than 60 kHz was recently introduced [Simion et al., J. Chem. Phys. 157, 014202 (2022)]. It was dubbed ROtor-Synchronized Phase-Alternated Cycles (ROSPAC), and it offers robustness for a large range of chemical shifts and low radio-frequency (RF) powers and is almost independent of the radio-frequency power. Here, we theoretically explore the robustness of the ROSPAC sequence toward 1H offset and RF field inhomogeneities, as well as the spacing effect of the π pulses on the decoupling efficiency. We use a generalized theoretical framework based on the Floquet theory to assess these parameters. The optimum decoupling conditions, where the magnitude of the second-order cross-terms and first-order resonance conditions are small, were identified. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000610194Publication status
publishedExternal links
Journal / series
The Journal of Chemical PhysicsVolume
Pages / Article No.
Publisher
American Institute of PhysicsOrganisational unit
08829 - Ernst, Matthias (Tit.-Prof.)
Funding
188988 - Method Development in Solid-State NMR and Dissolution DNP (SNF)
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ETH Bibliography
yes
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