title: Parking and restarting a molecular shuttle in situ.
abstract: Herein we report an easy-to-synthesize [2]rotaxane, which incorporates two ionic monopyridinium stations and one 2,2'-bipyridine station as the shaft of the dumbbell-shaped component and a bis-p-xylyl[26]crown-6 (BPX26C6) unit as the macrocyclic component. In this molecular shuttle, the BPX26C6 unit can be docked selectively on either the central 2,2'-bipyridine station or one of the two terminal pyridinium stations, and subsequently, returned to its shuttling molecular motion through the in situ addition of simple reagents (acid/base or metal ion/metal-ion-complexing ligand pairs).
authors.affiliation: Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, Taiwan, ROC.
authors.forename: Nai-Chia
authors.initials: NC
authors.lastname: Chen
authors.forename: Chien-Chen
authors.initials: CC
authors.lastname: Lai
authors.forename: Yi-Hung
authors.initials: YH
authors.lastname: Liu
authors.forename: Shie-Ming
authors.initials: SM
authors.lastname: Peng
authors.forename: Sheng-Hsien
authors.initials: SH
authors.lastname: Chiu
mesh_terms: D015082:2,2'-Dipyridyl / Q000737:chemistry; D043844:Crown Ethers / Q000737:chemistry; D018360:Crystallography, X-Ray; D046911:Macromolecular Substances / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy / Q000379:methods / Q000592:standards; D008958:Models, Molecular; D015394:Molecular Structure; D011726:Pyridinium Compounds / Q000737:chemistry; D012015:Reference Standards; D043862:Rotaxanes / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D043844:Crown Ethers; D046911:Macromolecular Substances; D011726:Pyridinium Compounds; D043862:Rotaxanes; C529529:bis-4-xylyl(26)crown-6; D015082:2,2'-Dipyridyl