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

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

Research output: Contribution to journalArticlepeer-review


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 (rCWApA) provides efficient and robust decoupling in this regime. An extensive experimental and numerical comparison is presented for rCWApA 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 (US)
Pages (from-to)243-249
Number of pages7
JournalChemical Physics Letters
StatePublished - Jan 16 2016

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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