Abstract
The interzeolite conversion of silicoaluminophosphate-type zeolite, SAPO-5 with AFI topology, was performed using a cyclic secondary amine, pyrrolidine, as an organic structure-directing-agent (OSDA). The introduced quantity of silica (SiO2) in SAPO-5 zeolite severely affected the framework structures of the products formed, and SAPO-5 possessing minimally reduced SiO2 content caused the interconversion to successfully yield a novel topological crystal, designated as GAM-4. Structural elucidation revealed that GAM-4 is found to be a new open-framework microporous crystal with 1-dimensional 10-ring channels along the a-axis constructing by polyhedral (4-, 5-, and 6-coordinated) Al and tetrahedral P atoms.
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Acknowledgements
This study was carried out by partial financial support through JSPS KAKENHI Grant Number 18K05200. T.I. thanks for the financial support by JSPS KAKENHI Grant Number 19H02513. All authors offer their thanks to Prof. K. Yamamoto (Kitakyushu univ.) for his measurement of water adsorption of GAM-4.
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Komura, K., Aoki, H. & Ikeda, T. GAM-4: a novel microporous silicoaluminophosphate crystal formed by the interzeolite conversion of SAPO-5 zeolite. J Porous Mater 29, 583–590 (2022). https://doi.org/10.1007/s10934-021-01183-0
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DOI: https://doi.org/10.1007/s10934-021-01183-0