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Residual Dipolar Coupling to Quadrupolar Nuclei with Negative Gyromagnetic Ratios in MAS NMR. Implications for (29Si, 14N) Effects in 29Si Solid-State NMR Spectra

✍ Scribed by Alejandro C. Olivieri

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 289 KB
Volume: 34
Category: Article
ISSN: 0749-1581
DOI: 10.1002/(sici)1097-458x(199605)34:5<365::aid-omr880>3.0.co;2-a

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✦ Synopsis

531, Rosario (ZOOO), Argentina

The calculation of residual dipolar coupling effects between (observed) spin-1/2 nuclei and quadrupolar neighbours in magic angle spinning NMR spectra may face complications if the nuclei involved have negative gyromagnetic ratios. A procedure is described with which these cases can be conveniently handled in order to avoid potentially confusing situations. Specific literature examples, involving ("Si, I4N) residual dipolar coupling effects in Si,Ncontaining compounds, are discussed.