A Heterowheel [3]Pseudorotaxane by Integrating β-Cyclodextrin and Cucurbit[8]uril Inclusion Complexes

A heterowheel [3]pseudorotaxane was prepared by integrating two binary inclusion complexes of β-cyclodextrin-hydroxynaphthalene (β-CD·<b>3</b>) with a cucurbit[8]uril-viologen derivative (CB[8]·<b>2</b>), in which simultaneous molecular recognition of the adamantine moiety in <b>2</b> by β-CD and the charge-transfer interaction of <b>3</b> with the viologen nucleus of <b>2</b> in the cavity of CB[8] are two crucial factors for the formation of the quaternary complex.