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Type: Journal article
Title: Separated and aligned molecular fibres in solid state self-assemblies of cyclodextrin [2]rotaxanes
Author: Onagi, H.
Carrozzini, B.
Cascarano, G.
Easton, C.
Edwards, A.
Lincoln, S.
Rae, A.
Citation: Chemistry-A European Journal, 2003; 9(24):5971-5977
Publisher: Wiley-V C H Verlag GMBH
Issue Date: 2003
ISSN: 0947-6539
Statement of
Hideki Onagi, Benedetta Carrozzini, Giovanni L. Cascarano, Christopher J. Easton, Alison J. Edwards, Stephen F. Lincoln and A. David Rae
Abstract: The conformations of two [2]rotaxanes, each comprising α-cyclodextrin as the rotor, a stilbene as the axle and 2,4,6-trinitrophenyl substituents as the capping groups, have been examined in solution and in the solid state, using ¹H NMR spectroscopy and X-ray crystallography, respectively. In solution, introducing substituents onto the stilbene prevents the cyclodextrin from being localized over one end of the axle. Instead the cyclodextrin moves back and forth along the substituted stilbene. In the solid state, the axles of the rotaxanes form extended molecular fibres that are separated from each other and aligned along a single axis. The molecular fibres are strikingly similar to those formed by the axle component of one of the rotaxanes in the absence of the cyclodextrin, but in the latter case they are neither separated nor all aligned.
Keywords: cyclodextrins; nanostructures; rotaxanes; self-assembly; supramolecular chemistry
Description: The original publication can be found at
RMID: 0020031137
DOI: 10.1002/chem.200305279
Appears in Collections:Chemistry publications
Environment Institute publications

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