Sulfonium-based organic structure-directing agents for microporous aluminophosphate synthesis

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Sulfur-centered phenyl, n-butyl, p-tolyl, and benzyl sulfoniums and sulfides were tested as organic structure-directing agents (SDAs) for the synthesis of crystalline microporous aluminophosphates (AIPOs) over various ranges of gel compositions, hydrothermal treatment temperatures, and crystallization times. Among the investigated compounds, triphenylsulfonium gave single-phase products of ATS-type AlPO and silicoaluminophosphate. Other sulfoniums yielded only non-porous, dense crystalline AlPOs. On the other hand, diaryl sulfides gave a tiny amount of AFI-type AlPO amid tridymite and amorphous phases. Based on the results, it was found to be reasonable that weakly basic sulfide could hardly act as a zeotype SDA due to the low protonation to sulfonium at the present synthesis pH.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2019-05
Language
English
Article Type
Article
Citation

Microporous and Mesoporous Materials, v.280, pp.75 - 81

ISSN
1387-1811
DOI
10.1016/j.micromeso.2019.01.048
URI
http://hdl.handle.net/10203/261019
Appears in Collection
CH-Journal Papers(저널논문)
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