title: Supramolecular control of unwinding and rewinding of a double helix of oligoresorcinol using cyclodextrin/adamantane system.
abstract: The double helix of the oligoresorcinol nonamer formed in water was unwound by beta-cyclodextrin (beta-CD), and the resulting single strands of the nonamer threaded the beta-CD to form a twisted [3]-pseudorotaxane with a controlled helicity. Upon the addition of an adamantane, the single strand of the oligoresorcinol nonamer was expelled out of the beta-CD wheels, thus regenerating the double helix. This supramolecularly controlled, reversible unwinding and rewinding of the double helix is unique and can be readily monitored by spectroscopic techniques.
authors.affiliation: Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), 101 Creation Core Nagoya, 2266-22 Shimoshidami, Moriyama-ku, Nagoya 463-0003, Japan.
authors.forename: Hidetoshi
authors.initials: H
authors.lastname: Goto
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Furusho
authors.forename: Eiji
authors.initials: E
authors.lastname: Yashima
mesh_terms: D000218:Adamantane / Q000737:chemistry*; D001713:Biphenyl Compounds / Q000737:chemistry*; D008968:Molecular Conformation; D012118:Resorcinols / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: D001713:Biphenyl Compounds; D012118:Resorcinols; D047392:beta-Cyclodextrins; C518814:nonaresorcinol; D014867:Water; C031215:betadex; D000218:Adamantane