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Updated: Oct 2, 2026

Transport Properties of Ibuprofen Encapsulated in Cyclodextrin Nanosponge Hydrogels: A Proton HR-MAS NMR Spectroscopy Study
Published on: August 15, 2016
Cyclodextrin Rotaxane with Switchable Pirouetting
Qi-Wei Zhang1, Jaroslav Zajíček1, Bradley D Smith1
1Department of Chemistry and Biochemistry , University of Notre Dame , 236 Nieuwland Science Hall , Notre Dame , Indiana 46556 , United States.
Abstract:
A [1]rotaxane with two threaded α-cyclodextrin (α-CD) wheels was synthesized in 92% yield using a one-pot process at room temperature that employed spontaneous α-CD threading onto a 12-carbon alkyl chain in water followed by an oxime condensation reaction that attached two boronic acid-containing stopper groups. Rapid pirouetting of the threaded α-CD wheels around the encapsulated dumbbell was switched "ON" or "OFF" by the presence of chemical additives that controlled boronate ester bond formation between the interlocked components.
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