A Triptycene-Based Bis(crown ether) Host: Complexation with Both Paraquat Derivatives and Dibenzylammonium Salts

A novel triptycene-based bis(crown ether) host (1) incorporating two dibenzo-24-crown-8 ether moieties has been synthesized. It can form not
only a new bis[2]pseudorotaxane with dibenzylammonium salts but also stable clip-shaped complexes with paraquat derivatives. Moreover,
the complexation process between 1 and the two classes of guests can be chemically controlled.