Two-Dimensional Satellite-Transition MAS NMR of Quadrupolar Nuclei: Shifted Echoes, High-Spin Nuclei and Resolution

Kevin J Pike; Sharon Elizabeth Ashbrook; Stephen Wimperis

doi:10.1016/s0009-2614(01)00912-5

Two-Dimensional Satellite-Transition MAS NMR of Quadrupolar Nuclei: Shifted Echoes, High-Spin Nuclei and Resolution

Kevin J Pike, Sharon Elizabeth Ashbrook, Stephen Wimperis

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

Abstract

Modifications to the satellite-transition magic angle spinning (STMAS) experiment for obtaining high-resolution NMR spectra of quadrupolar nuclei are discussed. A phase-modulated 'shifted-echo' STMAS experiment that yields pure absorptive lineshapes is presented and shown to be compatible with the 'split-t(1)' technique used in multiple-quantum (MQ) MAS NMR to reduce the duration of t(2) acquisition and avoid shearing the final two-dimensional spectrum. The application of STMAS to nuclei with spin greater than I = 3/2 is also considered. the dispersion of isotropic shifts achieved by STMAS and MQMAS are compared, and the effects of anisotropic 'cross-term' broadening mechanisms on linewidths in 'isotropic' STMAS spectra are discussed. (C) 2001 Elsevier Science B.V. All rights reserved.

Original language	English
Pages (from-to)	400-408
Number of pages	9
Journal	Chemical Physics Letters
Volume	345
DOIs	https://doi.org/10.1016/s0009-2614(01)00912-5
Publication status	Published - 21 Sept 2001

Keywords

RESIDUAL DIPOLAR COUPLINGS
SPECTRA

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10.1016/s0009-2614(01)00912-5

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title = "Two-Dimensional Satellite-Transition MAS NMR of Quadrupolar Nuclei: Shifted Echoes, High-Spin Nuclei and Resolution",

abstract = "Modifications to the satellite-transition magic angle spinning (STMAS) experiment for obtaining high-resolution NMR spectra of quadrupolar nuclei are discussed. A phase-modulated 'shifted-echo' STMAS experiment that yields pure absorptive lineshapes is presented and shown to be compatible with the 'split-t(1)' technique used in multiple-quantum (MQ) MAS NMR to reduce the duration of t(2) acquisition and avoid shearing the final two-dimensional spectrum. The application of STMAS to nuclei with spin greater than I = 3/2 is also considered. the dispersion of isotropic shifts achieved by STMAS and MQMAS are compared, and the effects of anisotropic 'cross-term' broadening mechanisms on linewidths in 'isotropic' STMAS spectra are discussed. (C) 2001 Elsevier Science B.V. All rights reserved.",

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AU - Pike, Kevin J

AU - Ashbrook, Sharon Elizabeth

AU - Wimperis, Stephen

PY - 2001/9/21

Y1 - 2001/9/21

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AB - Modifications to the satellite-transition magic angle spinning (STMAS) experiment for obtaining high-resolution NMR spectra of quadrupolar nuclei are discussed. A phase-modulated 'shifted-echo' STMAS experiment that yields pure absorptive lineshapes is presented and shown to be compatible with the 'split-t(1)' technique used in multiple-quantum (MQ) MAS NMR to reduce the duration of t(2) acquisition and avoid shearing the final two-dimensional spectrum. The application of STMAS to nuclei with spin greater than I = 3/2 is also considered. the dispersion of isotropic shifts achieved by STMAS and MQMAS are compared, and the effects of anisotropic 'cross-term' broadening mechanisms on linewidths in 'isotropic' STMAS spectra are discussed. (C) 2001 Elsevier Science B.V. All rights reserved.

KW - RESIDUAL DIPOLAR COUPLINGS

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DO - 10.1016/s0009-2614(01)00912-5

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JO - Chemical Physics Letters

JF - Chemical Physics Letters

ER -

Two-Dimensional Satellite-Transition MAS NMR of Quadrupolar Nuclei: Shifted Echoes, High-Spin Nuclei and Resolution

Abstract

Keywords

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