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Transverse Dephasing Optimised NMR Spectroscopy in Solids: Natural-Abundance 13C Correlation Spectra

✍ Scribed by Gaël De Paëpe; Anne Lesage; Stefan Steuernagel; Lyndon Emsley

Publisher: John Wiley and Sons
Year: 2004
Tongue: English
Weight: 243 KB
Volume: 5
Category: Article
ISSN: 1439-4235
DOI: 10.1002/cphc.200301062

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✦ Synopsis

Abstract

The transverse dephasing optimized (TDOP) approach can be used to obtain heteronuclear decoupling sequences that increase significantly coherence lifetimes in solid‐state NMR spectroscopy, leading to a dramatic improvement in the sensitivity of correlation experiments. Herein we demonstrate experimentally on several model organic compounds that, by applying this procedure, solid‐state ^13^C‐refocused INADEQUATE experiments are feasible at natural abundance on medium‐sized molecules. Examples are provided for powdered crystalline cholesteryl acetate as well as for a sample of brucine, a less ordered compound. Effects of molecular dynamics on the sensitivity of the experiment are also discussed for a sample of tyrosine ethyl ester.

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