SSZ-27: a small pore zeolite with large heart-shaped cavities determined using multi‐crystal electron diffraction
Abstract
The high‐silica zeolite SSZ‐27 was synthesized using one of the isomers of the organic structure‐directing agent that is known to produce the large‐pore zeolite SSZ‐26 (CON). The structure of the as‐synthesized form was solved using multi‐crystal electron diffraction data. Data were collected on eighteen crystals, and to obtain a high‐quality and complete data set for structure refinement, hierarchical cluster analysis was employed to select the data sets most suitable for merging. The framework structure of SSZ‐27 can be described as a combination of two types of cavities, one of which is shaped like a heart. The cavities are connected through shared 8‐ring windows to create straight channels that are linked together in pairs to form a one‐dimensional channel system. Once the framework structure was known, molecular modelling was used to find the best fitting isomer, and this, in turn, was isolated to improve the synthesis conditions for SSZ‐27.
Additional Information
© 2019 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim. 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. Accepted manuscript online: 26 July 2019; Manuscript accepted: 19 July 2019; Manuscript revised: 18 July 2019; Manuscript received: 23 April 2019. We thank Chevron Energy Technology Company for support and the continued interest in new zeolite materials from Dr. Robert Saxton and Dr. Georgie Scheuerman. We thank Dr. Ana Pinar and Dr. Antonio Cervellino for the powder diffraction measurements on the Materials Science Beamline at the SLS in Villigen, Switzerland and Dr. Kelvin Stone for help with measurements at the 2‐1 Powder Diffraction Beamline at the SSRL in Stanford (CA), US. We thank Kaustav Chaudhuri for the SEM images. This work was supported by the Swiss National Science Foundation (award numbers 165282 & 177761). The electron diffraction experiments were supported by the Knut and Alice Wallenberg Foundation (3DEM‐NATUR). The NMR facility at the California Institute of Technology was supported by the National Science Foundation (NSF) under Grant Number 9724240 and partially supported by the MRSEC Program of the NSF under Award Number DMR‐520565. The authors declare no conflict of interest.Attached Files
Published - Smeets_et_al-2019-Angewandte_Chemie_International_Edition.pdf
Supplemental Material - anie201905049-s1-ssz-27_as-synthesized.cif
Supplemental Material - anie201905049-s2-ssz-26_minor_phase.cif
Supplemental Material - anie201905049-s3-supporting_information.pdf
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Additional details
- PMCID
- PMC6773097
- Eprint ID
- 97440
- Resolver ID
- CaltechAUTHORS:20190726-100549302
- Chevron Energy Technology Company
- 165282
- Swiss National Science Foundation (SNSF)
- 177761
- Swiss National Science Foundation (SNSF)
- 3DEM-NATUR
- Knut and Alice Wallenberg Foundation
- DMR-9724240
- NSF
- DMR-520565
- NSF
- Created
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2019-07-26Created from EPrint's datestamp field
- Updated
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2022-02-17Created from EPrint's last_modified field