|
Title
|
|
|
|
Design of zeolite by inverse sigma transformation
|
|
|
Author
|
|
|
|
|
|
|
Abstract
|
|
|
|
| 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. |
|
|
|
Language
|
|
|
|
English
|
|
|
Source (journal)
|
|
|
|
Nature materials. - London, 2002, currens
|
|
|
Publication
|
|
|
|
London
:
2012
|
|
|
ISSN
|
|
|
|
1476-1122
[print]
1476-4660
[online]
|
|
|
Volume/pages
|
|
|
|
11
:12
(2012)
, p. 1059-1064
|
|
|
ISI
|
|
|
|
000311432600025
|
|
|
Full text (Publisher's DOI)
|
|
|
|
|
|
|
Full text (publisher's version - intranet only)
|
|
|
|
|
|