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Intergrown New Zeolite Beta Polymorphs with Interconnected 12-Ring Channels Solved by Combining Electron Crystallography and Single-Crystal X-ray Diffraction

DOI: 10.1021/cm301654d DOI Help

Authors: Zheng-bao Yu (Stockholm University, Sweden) , Yu Han (King Abdullah University of Science and Technology, Saudi Arabia) , Lan Zhao (King Abdullah University of Science and Technology, Saudi Arabia) , Shiliang Huang (Stockholm University, Sweden) , Qi-yu Zheng (Beijing National Laboratory for Molecular Sciences, China) , Shuangzheng Lin (Stockholm University, Sweden) , Armando Córdova (Stockholm University, Sweden) , Xiaodong Zou (Stockholm University, Sweden) , Junliang Sun (Stockholm University, Sweden)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chemistry Of Materials , VOL 24 (19)

State: Published (Approved)
Published: September 2012

Abstract: Two new polymorphs of zeolite beta, denoted as SU-78A and SU-78B, were synthesized by employing dicyclohexylammonium hydroxides as organic structure-directing agents. The structure was solved by combining transmission electron microscopy and single-crystal X-ray diffraction. SU-78 is an intergrowth of SU-78A and SU-78B and contains interconnected 12-ring channels in three directions. The two polymorphs are built from the same building layer, similar to that for the zeolite beta family. The layer stacking in SU-78, however, is different from those in zeolite beta polymorph A, B, and C, showing new zeolite framework topologies. SU-78 is thermally stable up to 600 °C.

Journal Keywords: crystal structure determination; electron crystallography; intergrowth; polymorph; porous material; transmission electron microscopy; zeolite; zeolite beta

Subject Areas: Chemistry

Instruments: I19-Small Molecule Single Crystal Diffraction

Added On: 01/10/2012 09:14

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