Cai Xianshu, Zhao Yue, Zi Wenwen, Jiao Feng, Du Hongbin
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China.
College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, P. R. China.
Chemistry. 2022 Aug 10;28(45):e202200934. doi: 10.1002/chem.202200934. Epub 2022 Jun 30.
Extra-large-pore zeolites have great application potential in various industrial fields, such as oil refinery, fine chemicals and biomass processing. Herein, we report the synthesis of an extra-large-pore germanosilicate zeolite (named NUD-13) by using an easily obtained aromatic organic cation 1,2-dimethyl-3-propyl-benzimidazolium as organic structure-directing agents. NUD-13 possesses a rare 15-member ring extra-large-pore channel intersecting with two elliptical 12-member ring channels, which is isostructural to germanosilicate zeolite GeZA synthesized by using triphenylsulfonium. The germanium in NUD-13 can be partially substituted by acid treatment to obtain stable high silica zeolite. In addition, aluminium is added into the framework of NUD-13 during the post-synthesis treatment process, which provides a foundation for catalytic application.
超大孔沸石在炼油、精细化工和生物质加工等各种工业领域具有巨大的应用潜力。在此，我们报道了通过使用易于获得的芳香族有机阳离子1,2-二甲基-3-丙基苯并咪唑鎓作为有机结构导向剂来合成超大孔锗硅酸盐沸石（命名为NUD-13）。NUD-13具有罕见的15元环超大孔道，与两个椭圆形的12元环孔道相交，它与使用三苯基锍合成的锗硅酸盐沸石GeZA同构。NUD-13中的锗可以通过酸处理进行部分取代，以获得稳定的高硅沸石。此外，在合成后处理过程中，铝被引入到NUD-13的骨架中，这为催化应用奠定了基础。
