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Motional narrowing of 1H magic-angle-spinning nuclear magnetic resonace spectra

✍ Scribed by Sokei Sekine; Atsushi Kubo; Hirotoshi Sano

Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 554 KB
Volume: 171
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(90)85219-3

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✦ Synopsis

In this publication, we show experimentally and theoretically that if the intermolecular dipolar interaction is negligible and the molecule performs rotational motion around at least one axis, the linewidth of the 'H magi~angle-spinning (MAS) nuclear magnetic resonance (NMR) spectra becomes close to zero. A method for calculating the spinning sideband intensities arising from the 'H-'H homonuclear dipolar interactions is described. We observed a very narrow series of spinning sidebands in the 'H MAS NMR spectra of cyclophosphazene inclusion compounds. The sideband intensities were analyzed according to the proposed method and the motional models of the guest molecules were determined.

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