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51V and 59Co Off-MAS NMR Spectra: Determination of Quadrupole Coupling, Chemical Shift Anisotropy and Their Relative Orientation

✍ Scribed by Shigenobu Hayashi

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 603 KB
Volume: 34
Category: Article
ISSN: 0749-1581
DOI: 10.1002/(sici)1097-458x(199610)34:10<791::aid-omr971>3.0.co;2-x

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✦ Synopsis

Quadruple coupling and chemical shift anisotropy are of comparable magnitudes in the NMR of quadrupole nuclei of heavy atoms. Magic angle spinning (MAS) and off-MAS NMR spectra of 'lV and 59C0 nuclei were measured for vanadium(V)aitrilotriacetate complex, cobalt(0) acetylacetonate and ammonium metavanadate. Spinning sidebands originating from satellite transitions are erased experimentally in the off-MAS spectra. The patterns of the central transition in the off-MAS spectra were analysed theoretically and parameters of quadrupole coupling, chemical shift anisotropy and their relative orientation were obtained.

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