Acidic properties of SSZ-33 and SSZ-35 novel zeolites: a complex infrared and MAS NMR study
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F08%3A00315585" target="_blank" >RIV/61388955:_____/08:00315585 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Acidic properties of SSZ-33 and SSZ-35 novel zeolites: a complex infrared and MAS NMR study
Original language description
Two novel zeolites SSZ-33 and SSZ-35 were investigated with respect to their acidic properties using different probe molecules to characterize the accessibility and acid strength of Lewis and Bronsted acid sites. Ammonia, pyridine, pivalonitrile, and acetonitrile-d(3) were used as probe molecules, and the results were correlated with Al-27 and H-1 magic angle spinning NMR. Both SSZ-33 and SSZ-35 zeolites were found to possess bridging Si-OH-Al groups of virtually uniform and high acid strength. For bothSSZ-33 and SSZ-35, there is the typical presence of highly disturbed OH groups (IR band around 3500 cm-1), which amounts to almost half of the overall Bronsted acidity. It was found that almost all bridging Si-OH-Al groups in SSZ-33 are located in the 12-MR rings. Both acetonitrile-d(3) and pyridine sorptions suggest the presence of two types of Lewis sites in SSZ-35, differing in acid strength and electron-acceptor properties, whereas in the SSZ-33 zeolite only one type is present.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2008
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Zeolites and Related Materials: Trends, Targets and Challenges
ISBN
978-0-444-53297-8
ISSN
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e-ISSN
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Number of pages
6
Pages from-to
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Publisher name
Elsevier B.V./Ltd
Place of publication
Oxford
Event location
Paris
Event date
Sep 1, 2008
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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