title: Versatile formation of [2]catenane and [2]pseudorotaxane structures; threading and noncovalent stoppering by a self-assembled macrocycle.
abstract: A self-assembled dimeric macrocycle between 4,4'-bis(4-pyridylmethoxy)biphenyl (L) and (en)Pd(NO(3))(2) was constructed, and its interactions with cyclodextrins of different cavity size resulted in the formation of [2]catenane and [2]pseudorotaxane systems, respectively. The structures were identified by 1D and 2D NMR spectroscopy and cold spray ionization mass (CSI-MS) spectrometry.
authors.affiliation: Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-747, Korea.
authors.forename: Choon Woo
authors.initials: CW
authors.lastname: Lim
authors.forename: Shigeru
authors.initials: S
authors.lastname: Sakamoto
authors.forename: Kentaro
authors.initials: K
authors.lastname: Yamaguchi
authors.forename: Jong-In
authors.initials: JI
authors.lastname: Hong