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

doi:10.1016/j.cplett.2015.12.014

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

Chemistry

Research output: Contribution to journal › Article › peer-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 language	English (US)
Pages (from-to)	243-249
Number of pages	7
Journal	Chemical Physics Letters
Volume	644
DOIs	https://doi.org/10.1016/j.cplett.2015.12.014
State	Published - Jan 16 2016

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/j.cplett.2015.12.014

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title = "Heteronuclear decoupling in MAS NMR in the intermediate to fast sample spinning regime",

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 (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.",

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AU - Equbal, Asif

AU - Bjerring, Morten

AU - Sharma, Kshama

AU - Madhu, P. K.

AU - Nielsen, Niels Chr

PY - 2016/1/16

Y1 - 2016/1/16

N2 - 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.

AB - 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.

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JO - Chemical Physics Letters

JF - Chemical Physics Letters

ER -

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

Abstract

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