Two-Dimensional MAS Multiple-Quantum NMR of Quadrupolar Nuclei. Removal of Inhomogeneous Second-Order Broadening
โ Scribed by Steven P. Brown; Stephen J. Heyes; Stephen Wimperis
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 153 KB
- Volume
- 119
- Category
- Article
- ISSN
- 1064-1858
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๐ SIMILAR VOLUMES
## Cross-polarization from 1 H to the multiple-quantum coherences of a quadrupolar nucleus is used in combination with the twodimensional multiple-quantum magic angle spinning (MQMAS) NMR experiment in order to extract high-resolution CPMAS NMR spectra. The technique is demonstrated on 23 Na (S โซุ
The distributions of both the quadrupolar and the isotopic chemical shift interactions are shown to give multiple-quantum MAS spectra that remain tilted after shearing. For both types of distribution, the theoretical slopes, formed by the resulting distribution of the centers of gravity of the signa