Heteronuclear decoupling in MAS NMR in the intermediate to fast sample spinning regime

Asif Equbal, Morten Bjerring, Kshama Sharma, P. K. Madhu*, Niels Christian Nielsen

*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Abstract

Heteronuclear spin decoupling in solid-state magic-angle spinning NMR is investigated to present methods overcoming interferences between rf irradiation and sample spinning in the intermediate to fast spinning regime. We demonstrate that a recent phase-alternated variant of refocused CW irradiation (rCW ApA) provides efficient and robust decoupling in this regime. An extensive experimental and numerical comparison is presented for rCW ApA and PISSARRO (phase-inverted supercycled sequence for attenuation of rotary resonance), previously introduced to quench rotary-resonance recoupling effects, under conditions with spinning frequencies between 30 and 60 kHz. Simulations are used to identify the effect of decoupling for various nuclear spin interactions.

Original languageEnglish
JournalChemical Physics Letters
Volume644
Pages (from-to)243-249
Number of pages7
ISSN0009-2614
DOIs
Publication statusPublished - 2016

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