Supramolecular control of unwinding and rewinding of a double helix of oligoresorcinol using cyclodextrin/adamantane system |
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Authors: | Goto Hidetoshi Furusho Yoshio Yashima Eiji |
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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. |
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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. |
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