1H solid-state NMR studies of the geomet
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Michael Hunger; Dieter Freude; Dieter Fenzke; Harry Pfeifer
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Article
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1992
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Elsevier Science
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English
β 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