title: Stepwise guest adsorption with large hysteresis in a coordination polymer {[Cu(bhnq)(THF)2](THF)}n constructed from a flexible hingelike ligand.
abstract: Reversible vapochromic behavior of a porous copper(II) coordination polymer {[Cu(bhnq)(THF)2](THF)}n (1; THF = tetrahydrofuran) constructed from a flexible hingelike ligand H2bhnq [2,2'-bis(3-hydroxy-1,4-naphthoquinone)] has been investigated by adsorption measurements. The isotherms show large hysteretic and stepwise profiles, suggesting the occurrence of the guest-induced framework transformation. The dynamic coil-like behavior of 1 can be controlled through the change of the hydrogen-bonding interactions caused by the reversible and selective incorporation of guest molecules.
authors.affiliation: Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
authors.forename: Koichi
authors.initials: K
authors.lastname: Yamada
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Tanaka
authors.forename: Sadahiro
authors.initials: S
authors.lastname: Yagishita
authors.forename: Keiichi
authors.initials: K
authors.lastname: Adachi
authors.forename: Takashi
authors.initials: T
authors.lastname: Uemura
authors.forename: Susumu
authors.initials: S
authors.lastname: Kitagawa
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kawata