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  • Title: Chemically responsive supramolecular assemblies of pyrene-beta-cyclodextrin dimer.
    Author: Ogoshi T, Hashizume M, Yamagishi TA, Nakamoto Y.
    Journal: Langmuir; 2010 Mar 02; 26(5):3169-73. PubMed ID: 19894753.
    Abstract:
    We report supramolecular assemblies of a beta-cyclodextrin dimer linked at both ends of a fluorescent phenylethynylpyrene moiety (Py-beta-CD dimer). The Py-beta-CD dimer formed supramolecular associations in aqueous media due to the pi-pi stacking of the hydrophobic phenylethynylpyrene moiety. From tapping mode atomic force microscopy measurements, the Py-beta-CD dimer formed wire-shaped assemblies in aqueous media. By adding sodium adamantane carboxylate to the supramolecular assemblies, the structural change to J-type assemblies was observed. In contrast, upon addition of the electron-deficient guest, the electron transfer from the electron rich phenylethynylpyrene moiety of the supramolecular assemblies to the electron-deficient guest took place.
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