The assembly-disassembly-organization-reassembly mechanism for 3D-2D-3D transformation of germanosilicate IWW zeolite

Pavla Chlubná-Eliášová; Yuyang Tian; Ana B Pinar; Martin Kubů; Jiří Čejka; Russell E Morris

doi:10.1002/anie.201400600

The assembly-disassembly-organization-reassembly mechanism for 3D-2D-3D transformation of germanosilicate IWW zeolite

Angew Chem Int Ed Engl. 2014 Jul 1;53(27):7048-52. doi: 10.1002/anie.201400600. Epub 2014 May 13.

Authors

Pavla Chlubná-Eliášová¹, Yuyang Tian, Ana B Pinar, Martin Kubů, Jiří Čejka, Russell E Morris

Affiliation

¹ Department of Synthesis and Catalysis, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of Czech Republic, v.v.i. Dolejškova 3, 18223 Prague (Czech Republic) http://www.jh-inst.cas.cz.

Abstract

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.

Keywords: ADOR; IWW; germanosilicate; solid-state transformation; zeolites.

© 2014 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.