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Measurement of nuclear magnetic dipole—dipole couplings in magic angle spinning NMR

✍ Scribed by Robert Tycko; Gary Dabbagh

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
423 KB
Volume
173
Category
Article
ISSN
0009-2614

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✦ Synopsis

We describe a method for measuring nuclear magnetic dipole-dipole couplings in NMR spectra of solids undergoing rapid magic angle spinning (MA?+). We show in theory, simulations, and experiments that the couplings, which are averaged out by MAS alone, can be recovered by applying simple resonant radiofrequency pulse sequences in synchrony with the sample rotation.

Experimental "C dipolar powder pattern spectra of polycrystalliie ( "CH&C(OH)S03Na obtained in a two-dimensional experiment based on this method are presented. The method provides a means of determining internuclear distances in polycrystalline and noncrystalline solids while retaining the high resolution and sensitivity afforded by MAS.

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