title: Highly fluorescent slipped-cofacial phthalocyanine dimer as a shallow inclusion complex with α-cyclodextrin.
abstract: Supramolecular control of the π-stacked configuration of aqueous phthalocyanine (Zn[Pc(SO(3))(4)]) was achieved, allowing organization of a J-type slipped-cofacial dimer with per-O-methylated α-cyclodextrin (TMe-α-CDx) by the aid of host-guest interactions. Pristine Zn[Pc(SO(3))(4)] forms nonfluorescent face-to-face aggregates in water. The π-stacked configuration was controlled in the slipped-cofacial dimer, which was formed as a shallow inclusion complex with TMe-α-CDx, giving remarkably enhanced fluorescence with a very small Stokes shift. Organization of the J-type slipped-cofacial dimer as a 2:2 Zn[Pc(SO(3))(4)]-TMe-α-CDx complex was achieved through π-stacking of the unencapsulated segment of Zn[Pc(SO(3))(4)] shallowly encapsulated by a small TMe-α-CDx cavity.
authors.affiliation: Department of Biomolecular Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. morisue@kit.ac.jp
authors.forename: Mitsuhiko
authors.initials: M
authors.lastname: Morisue
authors.forename: Shun
authors.initials: S
authors.lastname: Ueda
authors.forename: Masaki
authors.initials: M
authors.lastname: Kurasawa
authors.forename: Masanobu
authors.initials: M
authors.lastname: Naito
authors.forename: Yasuhisa
authors.initials: Y
authors.lastname: Kuroda
mesh_terms: D002236:Carbohydrate Conformation; D019281:Dimerization; D005456:Fluorescent Dyes / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D054833:Isoindoles; D008958:Models, Molecular; D014867:Water / Q000737:chemistry; D047391:alpha-Cyclodextrins / Q000737:chemistry*
chemical_list: D005456:Fluorescent Dyes; D007211:Indoles; D054833:Isoindoles; D047391:alpha-Cyclodextrins; D014867:Water; C013647:phthalocyanine