Double-rotation 27Al NMR studies of the aluminophosphate molecular sieve AlPO4-11
โ Scribed by Patrick J. Barrie; Mark E. Smith; Jacek Klinowski
- Book ID
- 107735132
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 512 KB
- Volume
- 180
- Category
- Article
- ISSN
- 0009-2614
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๐ SIMILAR VOLUMES
Solid-state 27AI NMR spectra of seve ra l aluminophosphate molecular sieves have been recorded with conventional magic-angle spinning (MAS), double-rotation (DOR) and quadrupole nutation with fast MAS. Enhanced resolution was obtained in the quadrupole nutation experiment at certain radiofrcqucncy p
Al double rotation (DOR) NMR spectroscopy has been applied to investigate the framework ordering in the aluminophosphate molecular sieve AlPO,-8 during the hydration process. Relative well-resolved peaks in the DOR spectra of both dehydrated and successively rehydrated AlPO,-8 allow the isotropic sh
AlPO,-H2 is a microporous hydrated aluminophosphate, structurally related to VPIS, whose framework has highly elliptical lo-ring channels (2.9 x 7.6 A) parallel to the c crystallographic axis. To resolve a previously reported discrepancy between nuclear magnetic resonance (NMR) and X-ray diffraction