Motional broadening: An important distinction between multiple-quantum and satellite-transition MAS NMR of quadrupolar nuclei

Sharon E. Ashbrook; Sasa Antonijevic; Andrew J. Berry; Stephen Wimperis

doi:10.1016/S0009-2614(02)01412-4

Motional broadening: An important distinction between multiple-quantum and satellite-transition MAS NMR of quadrupolar nuclei

Sharon E. Ashbrook, Sasa Antonijevic, Andrew J. Berry, Stephen Wimperis^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

69 Citations (Scopus)

Abstract

Multiple-quantum (MQ) and satellite-transition (ST) magic-angle spinning (MAS) are two very similar techniques used to obtain high-resolution or 'isotropic' NMR spectra of half-integer quadrupolar nuclei. In a variety of materials it is observed that some STMAS peaks are very broad compared with the corresponding MQMAS peaks, sometimes so broad that they are unobservable. We present ¹7O (I = 5/2) NMR spectra of two materials, chondrodite (2Mg₂SiO₄. Mg(OH)₂) and clinohumite (4Mg₂SiO₄.Mg(OH)₂), exhibiting this phenomenon and show that the cause is motional broadening arising from the combined e.ects of molecular reorientation, the quadrupolar interaction and MAS.

Original language	English
Pages (from-to)	634-642
Number of pages	9
Journal	Chemical Physics Letters
Volume	364
Issue number	5-6
DOIs	https://doi.org/10.1016/S0009-2614(02)01412-4
Publication status	Published - 16 Oct 2002

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title = "Motional broadening: An important distinction between multiple-quantum and satellite-transition MAS NMR of quadrupolar nuclei",

abstract = "Multiple-quantum (MQ) and satellite-transition (ST) magic-angle spinning (MAS) are two very similar techniques used to obtain high-resolution or 'isotropic' NMR spectra of half-integer quadrupolar nuclei. In a variety of materials it is observed that some STMAS peaks are very broad compared with the corresponding MQMAS peaks, sometimes so broad that they are unobservable. We present 17O (I = 5/2) NMR spectra of two materials, chondrodite (2Mg2SiO4. Mg(OH)2) and clinohumite (4Mg2SiO4.Mg(OH)2), exhibiting this phenomenon and show that the cause is motional broadening arising from the combined e.ects of molecular reorientation, the quadrupolar interaction and MAS.",

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T1 - Motional broadening

T2 - An important distinction between multiple-quantum and satellite-transition MAS NMR of quadrupolar nuclei

AU - Ashbrook, Sharon E.

AU - Antonijevic, Sasa

AU - Berry, Andrew J.

AU - Wimperis, Stephen

PY - 2002/10/16

Y1 - 2002/10/16

N2 - Multiple-quantum (MQ) and satellite-transition (ST) magic-angle spinning (MAS) are two very similar techniques used to obtain high-resolution or 'isotropic' NMR spectra of half-integer quadrupolar nuclei. In a variety of materials it is observed that some STMAS peaks are very broad compared with the corresponding MQMAS peaks, sometimes so broad that they are unobservable. We present 17O (I = 5/2) NMR spectra of two materials, chondrodite (2Mg2SiO4. Mg(OH)2) and clinohumite (4Mg2SiO4.Mg(OH)2), exhibiting this phenomenon and show that the cause is motional broadening arising from the combined e.ects of molecular reorientation, the quadrupolar interaction and MAS.

AB - Multiple-quantum (MQ) and satellite-transition (ST) magic-angle spinning (MAS) are two very similar techniques used to obtain high-resolution or 'isotropic' NMR spectra of half-integer quadrupolar nuclei. In a variety of materials it is observed that some STMAS peaks are very broad compared with the corresponding MQMAS peaks, sometimes so broad that they are unobservable. We present 17O (I = 5/2) NMR spectra of two materials, chondrodite (2Mg2SiO4. Mg(OH)2) and clinohumite (4Mg2SiO4.Mg(OH)2), exhibiting this phenomenon and show that the cause is motional broadening arising from the combined e.ects of molecular reorientation, the quadrupolar interaction and MAS.

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JO - Chemical Physics Letters

JF - Chemical Physics Letters

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Motional broadening: An important distinction between multiple-quantum and satellite-transition MAS NMR of quadrupolar nuclei

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