IDM-1: A Zeolite with Intersecting Medium and Extra-Large Pores Built as an Expansion of Zeolite MFI |
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| Authors: | Dr. Luis A. Villaescusa Dr. Jian Li Zihao Gao Prof. Junliang Sun Prof. Miguel A. Camblor |
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| Affiliation: | 1. Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat de València-Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain;2. College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, 5 Yiheyuan Road, Beijing, 100871 China;3. Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC), c/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain |
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| Abstract: | ![]()
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 SiO2 and hydrophilic SiO(2−x)(OH)2x 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. |
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| Keywords: | extra-large pores pentasil rotation electron diffraction structure solution zeolites |
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