Coherence selection in double CP MAS NMR spectroscopy
β Scribed by Jen-Hsien Yang; Fang-Chieh Chou; Der-Lii M. Tzou
- Book ID
- 108184917
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 346 KB
- Volume
- 195
- Category
- Article
- ISSN
- 1090-7807
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π SIMILAR VOLUMES
A new pulse sequence for high-resolution solid-state heteronuclear double-quantum MAS NMR spectroscopy of dipolar-coupled spin-12 nuclei is introduced. It is based on the five-pulse sequence known from solution-state NMR, which is here applied synchronously to both spin species. The heteronuclear do
spectra of aluminium acetylacetonate show distinct lineshapes depending on the experimental conditions as the different orientations within the powder cross-polarize with differmg efficiencies. Selective polarization transfer to the l/2++-l/2 transition occurs at rfpower levels corresponding to 3w,