Asselman Karel, Pellens Nick, Radhakrishnan Sambhu, Chandran C Vinod, Martens Johan A, Taulelle Francis, Verstraelen Toon, Hellström Matti, Breynaert Eric, Kirschhock Christine E A
COK-Kat, KU Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium.
NMRCoRe, KU Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium.
Mater Horiz. 2021 Aug 31;8(9):2576-2583. doi: 10.1039/d1mh00733e.
In inorganic zeolite formation, a direct correspondence between liquid state species in the synthesis and the supramolecular decoration of the pores in the as-made final zeolite has never been reported. In this paper, a direct link between the sodium speciation in the synthesis mixture and the pore structure and content of the final zeolite is demonstrated in the example of hydroxysodalite. Super-ions with 4 sodium cations bound by mono- and bihydrated hydroxide are identified as structure-directing agents for the formation of this zeolite. This documentation of inorganic solution species acting as a templating agent in zeolite formation opens new horizons for zeolite synthesis by design.
在无机沸石的形成过程中，合成过程中的液态物种与最终制成的沸石孔道的超分子修饰之间从未有过直接对应关系的报道。本文以羟基方钠石为例，证明了合成混合物中的钠形态与最终沸石的孔结构和含量之间存在直接联系。由单水合和二水合氢氧根结合的含有4个钠离子的超离子被确定为这种沸石形成的结构导向剂。这种无机溶液物种在沸石形成过程中充当模板剂的记录为通过设计合成沸石开辟了新的视野。
