title: One-pot synthesis of donor-acceptor [2]rotaxanes based on cryptand-paraquat recognition motif.
abstract: Two novel cryptand-based [2]rotaxanes were synthesized by a facile one-pot reaction from three neutral precursors: easily accessible cryptand host 1 and commercially available 4,4'-bipyridine and 3,5-di-tert-butylbenzyl bromide. Their structures were confirmed by (1)H NMR, 2D NMR, HRMS and X-ray analysis. Moreover, two [2]pseudorotaxanes based on the same cryptand hosts and dibenzyl viologen guest 3 were also demonstrated both in solution and in the solid state, which are different from previously reported [3]pseudorotaxane-like complexes formed by dimethyl viologen guest 2 and the cryptands.
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou, 510631, P. R. China.
authors.forename: Zhikai
authors.initials: Z
authors.lastname: Xu
authors.forename: Lasheng
authors.initials: L
authors.lastname: Jiang
authors.forename: Yahui
authors.initials: Y
authors.lastname: Feng
authors.forename: Suhui
authors.initials: S
authors.lastname: Zhang
authors.forename: Jidong
authors.initials: J
authors.lastname: Liang
authors.forename: Shaowu
authors.initials: S
authors.lastname: Pan
authors.forename: Yu
authors.initials: Y
authors.lastname: Yang
authors.forename: Dengke
authors.initials: D
authors.lastname: Yang
authors.forename: Yuepeng
authors.initials: Y
authors.lastname: Cai