Zeolites with extra-large pores have been attracted great attention because of their important applications such as in hydrocracking, catalysis, and separation of large molecules. Despite much progress has been made during the past decades, the synthesis of these materials remains a big challenge. Here we present a generalized synthetic approach to the extra-large pore zeolites based on supramolecular assemblies of organic cations as structure-directing agents (SDAs). By using this strategy, a variety of zeolites were produced, including extra-large pore zeolites ITQ-37 (30-membered ring, 30-MR), ITQ-43 (28-MR), ITQ-44 (18-MR) and ITQ-33 (18-MR), extra-large cage ITQ-29, and large pore zeolites ITQ-24 (12-MR), ITQ-21 (12-MR) and IM-20 (12-MR). XRD, elemental analysis, TGA, NMR and photoluminescent studies showed that the formation of supramolecular aggregates self-assembled via p-p interactions between the aromatic rings in organic cations contributed to the formation of extra-large pore zeolites.

Synthesis of ultra-large pore zeolites

248th National Meeting (2014)

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