Intergrown New Zeolite Beta Polymorphs with Interconnected 12-Ring Channels Solved by Combining Electron Crystallography and Single-Crystal X-ray Diffraction
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- 作者：Zheng-Bao Yu ; Yu Han ; Lan Zhao ; Shiliang Huang ; Qi-Yu Zheng ; Shuangzheng Lin ; Armando C贸rdova ; Xiaodong Zou ; Junliang Sun
- 刊名：Chemistry of Materials
- 出版年：2012
- 出版时间：October 9, 2012
- 年：2012
- 卷：24
- 期：19
- 页码：3701-3706
- 全文大小：360K
- 年卷期：v.24,no.19(October 9, 2012)
- ISSN：1520-5002
文摘
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 掳C.