A Cucurbituril-Based Gyroscane: A New Supramolecular Form

Concentric rotating and precessing macrocycles: The crystal structure of the inclusion complex of cucurbit[5]uril within cucurbit[10]uril shows the macrocycles to be concentric but not coaxial, and with a chloride ion at the center (see structure). Both rings rotate freely relative to each other in...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2002-01, Vol.41 (2), p.275-277
Main Authors: Day, Anthony I., Blanch, Rodney J., Arnold, Alan P., Lorenzo, Susan, Lewis, Gareth R., Dance, Ian
Format: Article
Language:English
Subjects:
Analogies
Chlorides
Crystal structure
Gyroscopes
host-guest systems
Inclusion complexes
molecular machines
Molecular structure
nanostructures
NMR spectroscopy
Rotating
self-assembly
supramolecular chemistry
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Summary:Concentric rotating and precessing macrocycles: The crystal structure of the inclusion complex of cucurbit[5]uril within cucurbit[10]uril shows the macrocycles to be concentric but not coaxial, and with a chloride ion at the center (see structure). Both rings rotate freely relative to each other in solution, as shown by NMR spectroscopy. The facile axial and precessive motion of the inner ring relative to the outer ring represents the molecular analogy of the gyroscope.
ISSN:1433-7851
1521-3773
DOI:10.1002/1521-3773(20020118)41:2<275::AID-ANIE275>3.0.CO;2-M