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Predicting the Activity of Single Isolated Lewis Acid Sites in Solid Catalysts

✍ Scribed by Mercedes Boronat; Avelino Corma; Michael Renz; Pedro M. Viruela


Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
425 KB
Volume
12
Category
Article
ISSN
0947-6539

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Solid-state NMR studies of the geometry
✍ Dieter Freude; Jacek Klinowski; Halimaton Hamdan πŸ“‚ Article πŸ“… 1988 πŸ› Elsevier Science 🌐 English βš– 673 KB

H 2'AI and %i solid-state NMR was used to determine the geometry of the Brsnsted acid site in zeolites. The mean distance between acidic protons in bridging hydroxyl groups and the nearest framework Al atom is 2.38 ? 0.04 8, in zeolite H-Y and 2.48 2 0.04 A in H-ZSM-5. The quadrupole frequency of fr