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IDM‐1: A Zeolite with Intersecting Medium and Extra‐Large Pores Built as an Expansion of Zeolite MFI
Author(s) -
Villaescusa Luis A.,
Li Jian,
Gao Zihao,
Sun Junliang,
Camblor Miguel A.
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202001740
Subject(s) - zeolite , calcination , diffraction , materials science , catalysis , thermal stability , thermal expansion , synchrotron , powder diffraction , chemical engineering , molecular sieve , x ray crystallography , crystallography , chemistry , composite material , organic chemistry , optics , physics , engineering
IDM‐1 is a new silica zeolite with an ordered and well‐defined framework constructed by alternating pentasil layers and interrupted layers, giving rise to an intersecting system of straight medium pores and undulating extra‐large lobed pores. This unique structure was solved by rotation electron diffraction and refined against synchrotron powder X‐ray diffraction data. Despite the presence of both Si(OSi) 3 (OH) and Si(OSi) 2 (OH) 2 sites, this new zeolite presents high thermal stability, withstanding calcination even to 1000 °C. The location of defects at specific sites of the structure results in alternating hydrophobic SiO 2 and hydrophilic SiO (2− x ) (OH) 2 x intracrystalline regions. This peculiar combination of intersecting medium and extra‐large pores and alternating regions of different chemical character may provide this zeolite with unique catalytic properties.