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A Germanosilicate Structure with 11×11×12‐Ring Channels Solved by Electron Crystallography
Author(s) -
Hua Wei,
Chen Hong,
Yu ZhengBao,
Zou Xiaodong,
Lin Jianhua,
Sun Junliang
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201309766
Subject(s) - zeolite , ring (chemistry) , crystallography , electron diffraction , selectivity , materials science , catalysis , diffraction , sorption , chemistry , organic chemistry , physics , adsorption , optics
Zeolites have been widely used in industry owing to their ordered micropores and stable frameworks. The pore sizes and shapes are the key parameters that affect the selectivity and efficiency in their applications in catalysis, sorption, and separation. Zeolites with pores defined by 10 and 12 TO 4 tetrahedra are often used for various catalytic processes. To optimize the performance of zeolites, it is extremely desirable to fine‐tune the pore sizes/shapes. The first germanosilicate zeolite with a three‐dimensional 11×11×12‐ring channel system, PKU‐16 (PKU, Peking University) is presented. Nanosized PKU‐16 was structurally characterized by the new three‐dimensional rotation electron diffraction (RED) technique. PKU‐16 is structurally related to the zeolite β polymorph C (BEC, 12×12×12‐ring channels) by rotating half of the four‐rings in double mtw units.