title: [2]Pseudorotaxanes based on the recognition of cryptands to vinylogous viologens.
abstract: Host-guest complexation between two crown ether-based cryptands and two vinylogous viologens has been studied. Formation of [2]pseudorotaxanes from a dibenzo-24-crown-8-based cryptand and these vinylogous viologens can be reversibly controlled by adding and removing potassium cation in acetone. Furthermore, the complexation between a bis(m-phenylene)-32-crown-10-based cryptand and a vinylogous viologen exhibits a high association constant, 1.18 × 10(6) M(-1) in acetone, and leads to the formation of a supramolecular poly[2]pseudorotaxane in the solid state.
authors.affiliation: Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China.
authors.forename: Xuzhou
authors.initials: X
authors.lastname: Yan
authors.forename: Peifa
authors.initials: P
authors.lastname: Wei
authors.forename: Mingming
authors.initials: M
authors.lastname: Zhang
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Chi
authors.forename: Jiyong
authors.initials: J
authors.lastname: Liu
authors.forename: Feihe
authors.initials: F
authors.lastname: Huang