The protonation of a cyclic tertiary amine, integrated into the structure of a dumbbell-shaped guest molecule, accelerates the sliding of the guest through the cavity of a crown ether macrocycle to yield a stable pseudo-rotaxane complex. The use of an amine with the appropriate ring size followed by a proton transfer reaction leads to the formation of an interlocked rotaxane species.
A. C. Catalán and J. Tiburcio, Chem. Commun., 2016, 52, 9526 DOI: 10.1039/C6CC04619C
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