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7635989 
Journal Article 
Chemically responsive supramolecular assemblies of pyrene-beta-cyclodextrin dimer 
Ogoshi, T; Hashizume, M; Yamagishi, TA; Nakamoto, Y; , 
2010 
1 
Langmuir
ISSN: 0743-7463
EISSN: 1520-5827 
AMER CHEMICAL SOC 
WASHINGTON 
26 
5 
3169-3173 
English 
19894753 
WOS:000274636900030 
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.