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Title
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Design of zeolite by inverse sigma transformation
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Author
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Abstract
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| Although the search for new zeolites has traditionally been based on trial and error, more rational methods are now available. The theoretical concept of inverse transformation of a zeolite framework to generate a new structure by removal of a layer of framework atoms and contraction has for the first time been achieved experimentally. The reactivity of framework germanium atoms in strong mineral acid was exploited to selectively remove germanium-containing four-ring units from an UTL type germanosilicate zeolite. Annealing of the leached framework through calcination led to the new all-silica COK-14 zeolite with intersecting 12- and 10-membered ring channel systems. An intermediate stage of this inverse transformation with dislodged germanate four-rings still residing in the pores could be demonstrated. Inverse transformation involving elimination of germanium-containing structural units opens perspectives for the synthesis of many more zeolites. |
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Language
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English
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Source (journal)
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Nature materials. - London, 2002, currens
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Publication
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London
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2012
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ISSN
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1476-1122
[print]
1476-4660
[online]
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DOI
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10.1038/NMAT3455
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Volume/pages
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11
:12
(2012)
, p. 1059-1064
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ISI
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000311432600025
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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