Gao Zihao Rei, Balestra Salvador R G, Li Jian, Camblor Miguel A
Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC), c/ Sor Juana Inés de la Cruz, 3, Madrid, 28049, Spain.
Berzelii Center EXSELENT on Porous Materials, Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, 10691, Sweden.
Chemistry. 2021 Dec 23;27(72):18109-18117. doi: 10.1002/chem.202103288. Epub 2021 Nov 17.
One common strategy in the search for new zeolites is the use of organic structure-directing agents (OSDA). Typically, one seeks to achieve a high specificity in the structure-directing effect of the OSDA. This study shows, however, that an OSDA lacking strong specificity towards any particular zeolite may provide opportunities for discovery when other synthesis parameters are systematically screened. Thus, 1-methyl-2-ethyl-3-n-propylimidazolium has allowed to crystallize the new large/medium pore zeolite HPM-16 as well as the recently reported extra-large pore -SYT and the medium/small pore and chiral STW. The sophisticated OSDA originally affording -SYT and the new simple OSDA have very little in common, both in terms of size, shape and flexibility, while both may still direct the synthesis of the same zeolite. In fact, molecular simulations show that the new OSDA is located in three different positions of the -SYT structure, including the discrete 8MR where the original organic could not fit.
寻找新型沸石的一种常见策略是使用有机结构导向剂（OSDA）。通常，人们试图在OSDA的结构导向作用中实现高特异性。然而，这项研究表明，当系统地筛选其他合成参数时，对任何特定沸石缺乏强特异性的OSDA可能会提供发现的机会。因此，1-甲基-2-乙基-3-正丙基咪唑鎓已使新型大/中孔沸石HPM-16以及最近报道的超大孔-SYT和中/小孔及手性STW得以结晶。最初生成-SYT的复杂OSDA和新的简单OSDA在尺寸、形状和柔韧性方面几乎没有共同之处，而两者仍可能指导相同沸石的合成。事实上，分子模拟表明，新的OSDA位于-SYT结构的三个不同位置，包括原始有机物无法适配的离散8元环处。
