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Previous studies on amphiphilic CDs bearing 14 aliphatic chains at the secondary face and 7 oligoethylene glycol (OEG) chains at the primary face showed that the stability of the mesophase can be rationally tuned through implementation of terminal functional groups to the OEG chains. Here, we report the syntheses of first examples of crown ether\u2010functionalized amphiphilic cyclodextrins that unexpectedly form thermotropic bicontinuous cubic phases. This constitutes the first reported examples of cyclodextrins forming such phases, which are potentially capable of 3D ion transport. Lithium composites were made to assess lithium conduction in the material. XRD revealed the added lithium salt destabilizes the cubic phase in favour of the smectic phase. Solid\u2010state NMR studies showed that these materials conduct lithium ions with a very low activation energy.<\/jats:p>","DOI":"10.1002\/chem.202403232","type":"journal-article","created":{"date-parts":[[2024,10,9]],"date-time":"2024-10-09T09:13:44Z","timestamp":1728465224000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Unprecedented Cubic Mesomorphic Behaviour of Crown\u2010Ether Functionalized Amphiphilic Cyclodextrins"],"prefix":"10.1002","volume":"30","author":[{"given":"Jayar","family":"Espejo","sequence":"first","affiliation":[{"name":"Department of Chemistry University of Calgary  2500 University Drive NW Calgary, AB T2N\u20091N4, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carson O.","family":"Zellmann\u2010Parrotta","sequence":"additional","affiliation":[{"name":"Department of Chemistry Simon Fraser University  8888 University Dr W Burnaby, BC V5A\u20091S6, 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