Issue 1, 2015

ITQ-54: a multi-dimensional extra-large pore zeolite with 20 × 14 × 12-ring channels

Abstract

A multi-dimensional extra-large pore silicogermanate zeolite, named ITQ-54, has been synthesised by in situ decomposition of the N,N-dicyclohexylisoindolinium cation into the N-cyclohexylisoindolinium cation. Its structure was solved by 3D rotation electron diffraction (RED) from crystals of ca. 1 μm in size. The structure of ITQ-54 contains straight intersecting 20 × 14 × 12-ring channels along the three crystallographic axes and it is one of the few zeolites with extra-large channels in more than one direction. ITQ-54 has a framework density of 11.1 T atoms per 1000 Å3, which is one of the lowest among the known zeolites. ITQ-54 was obtained together with GeO2 as an impurity. A heavy liquid separation method was developed and successfully applied to remove this impurity from the zeolite. ITQ-54 is stable up to 600 °C and exhibits permanent porosity. The structure was further refined using powder X-ray diffraction (PXRD) data for both as-made and calcined samples.

Graphical abstract: ITQ-54: a multi-dimensional extra-large pore zeolite with 20 × 14 × 12-ring channels

Supplementary files

Article information

Article type
Edge Article
Submitted
25 Aug 2014
Accepted
08 Oct 2014
First published
08 Oct 2014
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2015,6, 480-485

Author version available

ITQ-54: a multi-dimensional extra-large pore zeolite with 20 × 14 × 12-ring channels

J. Jiang, Y. Yun, X. Zou, J. L. Jorda and A. Corma, Chem. Sci., 2015, 6, 480 DOI: 10.1039/C4SC02577F

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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