title: A redox-controllable molecular switch based on weak recognition of BPX26C6 at a diphenylurea station.
abstract: The Na+ ion-assisted recognition of urea derivatives by BPX26C6 has allowed the construction of a redox-controllable [2]rotaxane-type molecular switch based on two originally very weakly interacting host/guest systems. Using NOBF4 to oxidize the triarylamine terminus into a corresponding radical cation attracted the macrocyclic component toward its adjacent carbamate station; subsequent addition of Zn powder moved the macrocyclic component back to its urea station.
authors.affiliation: Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan. f99223182@ntu.edu.tw.
authors.forename: Jia-Cheng
authors.initials: JC
authors.lastname: Chang
authors.affiliation: Institute of Molecular Biology, National Chung Hsing University, Taichung 402, Taiwan. lailai@dragon.nchu.edu.tw.
authors.forename: Chien-Chen
authors.initials: CC
authors.lastname: Lai
authors.affiliation: Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan. shchiu@ntu.edu.tw.
authors.forename: Sheng-Hsien
authors.initials: SH
authors.lastname: Chiu
mesh_terms: D002224:Carbanilides / Q000737:chemistry*; D043844:Crown Ethers / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D008968:Molecular Conformation; D010084:Oxidation-Reduction; D043862:Rotaxanes / Q000138:chemical synthesis; D012964:Sodium / Q000737:chemistry; D015032:Zinc / Q000737:chemistry
chemical_list: D002224:Carbanilides; D043844:Crown Ethers; D043862:Rotaxanes; C529529:bis-4-xylyl(26)crown-6; D012964:Sodium; D015032:Zinc