Zheng Meng and Chuan-Feng Chen*

A novel triply interlocked [2]rotaxane based on a triptycene-derived tris(crown ether) host and a guest embedded with three dibenzylammonium and three N-methyltriazolium recognition sites was designed and synthesized, which showed pulley-like shuttling motion controlled by acid and base.

This work has been published in Chem. Commun., 2015, 51, 8241-8244.