| Abstract
| - A chemically addressable, bistable [2]rotaxane, which incorporates a dumbbell-shaped componentcontaining both secondary dialkylammonium and 1,2-bis(pyridinium)ethane recognition sites forits ring component, dibenzo[24]crown-8 (DB24C8), has been assembled. 1H NMR spectroscopy hasdemonstrated that deprotonation (and reprotonation) of the secondary dialkylammonium (dialkylamine) recognition site induces the DB24C8 ring to move away from this site to the 1,2-bis(pyridinium)ethane one (and back again) in a discrete manner, particularly when the experimentis performed in CDCl3 solution.
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