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Issue 1, 2015
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ITQ-54: a multi-dimensional extra-large pore zeolite with 20 × 14 × 12-ring channels

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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

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Publication details

The article was received on 25 Aug 2014, accepted on 08 Oct 2014 and first published on 08 Oct 2014


Article type: Edge Article
DOI: 10.1039/C4SC02577F
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Chem. Sci., 2015,6, 480-485
  • Open access: Creative Commons BY license
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    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

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