Luo Yi, Smeets Stef, Peng Fei, Etman Ahmed S, Wang Zhendong, Sun Junliang, Yang Weimin
State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Sinopec Shanghai Research Institute of Petrochemical Technology, 1658 Pudong Beilu, Shanghai, 201208, P. R. China.
Department of Materials and Environmental Chemistry, Stockholm University, 106 91, Stockholm, Sweden.
Chemistry. 2017 Nov 27;23(66):16829-16834. doi: 10.1002/chem.201703361. Epub 2017 Nov 3.
SCM-14 (Sinopec Composite Material No. 14), a new stable germanosilicate zeolite with a 12×8×8-ring channel system, was synthesized using commercially available 4-pyrrolidinopyridine as organic structure-directing agents (OSDAs) in fluoride medium. The framework structure of SCM-14 was determined using rotation electron diffraction (RED), and refined against synchrotron X-ray powder diffraction (SXPD) data for both as-made and calcined materials. The framework structure of SCM-14 is closely related to that of three known zeolites: mordenite (MOR), GUS-1 (GON), and IM-16 (UOS). SCM-14 has the same projection as that of mordenite and GUS-1 when viewed along the 12-ring channels, and possesses two more straight 8-ring channels running perpendicular to the 12-ring channels. The structure of SCM-14 can be constructed by either the same layers as that of GUS-1 or the same columns as that of IM-16. Based on their structural relationship, three topologically reasonable hypothetical zeolites were predicted.
SCM-14（中石化复合材料14号）是一种新型稳定的锗硅沸石，具有12×8×8环孔道体系，它是在氟化物介质中使用市售的4-吡咯烷基吡啶作为有机结构导向剂（OSDAs）合成的。利用旋转电子衍射（RED）确定了SCM-14的骨架结构，并根据合成态和煅烧材料的同步加速器X射线粉末衍射（SXPD）数据进行了精修。SCM-14的骨架结构与三种已知沸石密切相关：丝光沸石（MOR）、GUS-1（GON）和IM-16（UOS）。当沿12元环孔道观察时，SCM-14与丝光沸石和GUS-1具有相同的投影，并且拥有另外两条垂直于12元环孔道的直的8元环孔道。SCM-14的结构可以由与GUS-1相同的层或与IM-16相同的柱构建而成。基于它们的结构关系，预测了三种拓扑合理的假设沸石。
