17O MQMAS NMR studies of zeolite HY
β Scribed by Luming Peng; Hua Huo; Zhehong Gan; Clare P. Grey
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 290 KB
- Volume
- 109
- Category
- Article
- ISSN
- 1387-1811
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π SIMILAR VOLUMES
Multiple-quantum magic-angle spinning and double-rotation NMR techniques were applied in the high field of 17.6 T to the study of oxygen-17-enriched zeolites A and LSX with the ratio Si/Al = 1. A monotonic correlation between the isotropic value of the chemical shift and the Si-O-Al bond angle Ξ± (ta
## Abstract ^17^O NMR spectra of some oximes were measured at natural isotopic abudance in pyridine and acetonitrile solutions; a clear Ξ΄ effect was observed. No correlation with the SCS treatment was found for __para__ substitution.