title: Synthesis of a [2]rotaxane incorporating a Ni(II)-salen moiety: evidence of ring-opening-and-closing protocol.
abstract: [reaction: see text] We have synthesized a [2]rotaxane from a crown-ether-like macrocycle that undergoes ring opening and closing through cleavage and formation of imino bonds of a salen moiety; the self-assembly of this macrocycle and a dumbbell-shaped rodlike component, followed by addition of nickel acetate, afforded, after counterion exchange, a [2]rotaxane that is stabilized through coordination of the Ni ion to the macrocycle's salen moiety.
authors.affiliation: Nanoarchitectonics Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Ibaraki, Japan.
authors.forename: Il
authors.initials: I
authors.lastname: Yoon
authors.forename: Mamiko
authors.initials: M
authors.lastname: Narita
authors.forename: Midori
authors.initials: M
authors.lastname: Goto
authors.forename: Toshimi
authors.initials: T
authors.lastname: Shimizu
authors.forename: Masumi
authors.initials: M
authors.lastname: Asakawa