| Abstract
| - A novel triptycene-based cylindrical macrotricyclic host 1 containing an anthracene unit and two dibenzo[24]crown-8 moieties was synthesized, and its cation binding properties were studied. It was found thatthe host could not only form complex with the paraquat derivative 4, but also show selective templatedcomplexation with pyromellitic diimide 2 and anthraquinone 3 in the presence of lithium and potassiumions, respectively. Consequently, two novel cascade complexes with neutral molecules as bridging specieswere formed in solution and in the solid state, which were structurally studied by NMR, MS spectra, andX-ray methods. Moreover, we also found that the association and dissociation of the complexes could beeasily achieved by the addition and removal of lithium or potassium ions, which resulted in three cation-controlled switchable processes.
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