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FTIR spectroscopic and1H MAS NMR studies of the influence of lattice chemistry and structure on Brønsted acidity in zeolites

✍ Scribed by J. Jänchen; J. H. M. C. Wolput; L. J. M. Ven; J. W. Haan; R. A. Santen

Book ID
112412398
Publisher
Springer US
Year
1996
Tongue
English
Weight
514 KB
Volume
39
Category
Article
ISSN
1011-372X

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1H solid-state NMR studies of the geomet
1H solid-state NMR studies of the geometry of Brønsted acid sites in zeolites H-ZSM-5
✍ Michael Hunger; Dieter Freude; Dieter Fenzke; Harry Pfeifer 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 419 KB

Broad-line 'H NMR and 'H MAS NMR were used to determine the geometry of the Bransted acidic sites in zeolites H-ZSM-5. The signals obtained correspond to bridging hydroxyl groups in Si-OH-Al arrangements with an H-Al distance of 0.246-0.252 nm. The concentration of hypothetical SiOHSi groups must be