Angewandte Chemie International Edition in English · 1997 · 188 citations · 21 references
Natural SciencesChemistryMolecular PhysicsOrganic ChemistryMolecular RotationMolecular SymmetryRotational StructureChain OrientationInternally Rotating MoleculesMolecular OrientationMolecular RatchetsMolecular RotaxanesSprings
Triptycylhelicenes 1 and 2 were examined as molecular rachets (see picture) in which the triptycene serves as the rachet wheel (a) and the helicenes as pawl (b) and spring (c). The ease of rotation of the triptycene wheel depends on the helicene springs and pawls, but do these have any influence on the direction of rotation?
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