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Their use holds promise to regulate physicochemical properties of zeolitic materials toward enhancing the relevant catalytic performances. In this study, a stepwise alkylation of 1,4\u2010diazabicyclo[2.2.2]octane (Dab) to generate asymmetric di\u2010quaternary derivatives has been established, enabling their use as OSDAs in large pore zeolite synthesis. Through exploratory syntheses, we showed that small Me\u2010Dab\u2010Et can direct the formation of\n                    <jats:bold>SBT<\/jats:bold>\n                    zeolite in multiple inorganic cation (Cs\n                    <jats:sup>+<\/jats:sup>\n                    \u2500Na\n                    <jats:sup>+<\/jats:sup>\n                    ) crystallization, while the bulky Me\u2010Dab\u2010\n                    <jats:italic>i<\/jats:italic>\n                    Pr and Me\u2010Dab\u2010\n                    <jats:italic>s<\/jats:italic>\n                    Bu lead to the formation of\n                    <jats:bold>FAU<\/jats:bold>\n                    \u2010\n                    <jats:bold>SBT<\/jats:bold>\n                    \u2010\n                    <jats:bold>SBS<\/jats:bold>\n                    intergrowths. The obtained\n                    <jats:bold>SBT<\/jats:bold>\n                    zeolite exhibited higher olefin selectivity in catalytic upgrading of pyrolysis oil derived from polyethylene, with respect to alike cage\u2010containing faujasite (\n                    <jats:bold>FAU<\/jats:bold>\n                    ) zeolite. Our findings expand the library of asymmetric di\u2010quaternary OSDAs and highlight their capability to achieve phase selective synthesis of large pore zeolites.\n                  <\/jats:p>","DOI":"10.1002\/chem.202500969","type":"journal-article","created":{"date-parts":[[2025,6,25]],"date-time":"2025-06-25T03:43:04Z","timestamp":1750822984000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Phase Selective Synthesis of SBT and FAU\u2010SBT\u2010SBS Intergrown Zeolites Using Asymmetric Organic Structure\u2010Directing Agents for Upgrading of Polyethylene Pyrolysis Oil"],"prefix":"10.1002","volume":"31","author":[{"given":"Xiuyang","family":"Gong","sequence":"first","affiliation":[{"name":"State Key Laboratory of Green Chemical Engineering and Industrial Catalysis East China University of Science and Technology  Shanghai 200237 P.R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yang","family":"Gao","sequence":"additional","affiliation":[{"name":"School of Chemical Science and Engineering Tongji University  Shanghai 200092 P.R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yanxia","family":"Guo","sequence":"additional","affiliation":[{"name":"Luoyang Jalon Micro\u2010Nano New Materials Co., Ltd  Luoyang Henan Province 471900 P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hongliang","family":"Cao","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Green Chemical Engineering and Industrial Catalysis East China University of Science and Technology  Shanghai 200237 P.R. 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