The Assembly-Disassembly-Organization-Reassembly Mechanism for 3D-2D-3D Transformation of Germanosilicate IWW Zeolite

Hydrolysis of germanosilicate zeolites with the IWW structure shows two different outcomes depending on the composition of the starting materials. Ge‐rich IWW (Si/Ge=3.1) is disassembled into a layered material (IPC‐5P), which can be reassembled into an almost pure silica IWW on treatment with dieth...

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Bibliographic Details
Published in:Angewandte Chemie 2014-07, Vol.126 (27), p.7168-7172
Main Authors: Chlubná-Eliášová, Pavla, Tian, Yuyang, Pinar, Ana B., Kubů, Martin, Čejka, Jiří, Morris, Russell E.
Format: Article
Language:eng ; ger
Subjects:
ADOR
Aluminum
Chemistry
Dismantling
Festkörperreaktionen
Germanium
Germanosilicate
Hydrolysis
IWW
Layered materials
Silicon
Three dimensional
Transformations
Zeolites
Zeolithe
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Summary:Hydrolysis of germanosilicate zeolites with the IWW structure shows two different outcomes depending on the composition of the starting materials. Ge‐rich IWW (Si/Ge=3.1) is disassembled into a layered material (IPC‐5P), which can be reassembled into an almost pure silica IWW on treatment with diethoxydimethylsilane. Ge‐poor IWW (Si/Ge=6.4) is not completely disassembled on hydrolysis, but retains some 3D connectivity. This structure can be reassembled into IWW by incorporation of Al to fill the defects left when the Ge is removed. Ätzen und ersetzen: Mithilfe des ADOR‐Mechanismus – kurz für Aufbau‐Abbau‐Organisation‐Neuaufbau – werden Germanosilicat‐Zeolithe mit IWW‐Gerüst manipuliert. Welche Produkte dabei entstehen, hängt entscheidend vom Si/Ge‐Verhältnis des Ausgangsmaterials ab.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201400600