A Germanosilicate Structure with 11 x 11 x 12-Ring Channels Solved by Electron Crystallography

作者：Hua, Wei; Chen, Hong; Yu, Zheng-Bao; Zou, Xiaodong; Lin, Jianhua^*; Sun, Junliang

来源：Angewandte Chemie - International Edition, 2014, 53(23): 5868-5871.

DOI：10.1002/anie.201309766

• electron microscopy
• porous materials
• powder X-ray diffraction
• structure elucidation
• zeolites

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 TO4 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 x 11 x 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 beta polymorph C (BEC, 12 x 12 x 12-ring channels) by rotating half of the four-rings in double mtw units.

• 出版日期2014-6
• 单位北京大学; 中国地质大学（北京）