Picking up the thread: A large, reversible change in size as well as shape is observed in a pseudorotaxane-based molecular machine composed of cucurbituril (CB; bead) and a hexamethylene-bridged bisviologen (thread, see schematic representation) on application of external stimuli. The key feature of the machinelike behavior is the reversible formation of a molecular loop by intramolecular pairing of the terminal viologen radical cation units inside CB upon electrochemical or photochemical reduction.
|Number of pages||4|
|Journal||Angewandte Chemie - International Edition|
|State||Published - 5 Sep 2003|
- Molecular devices
- Supramolecular chemistry