Web Release Date: October 13,
A Simple Molecular Machine Operated by Photoinduced Proton Transfer
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Dipartimento di Chimica "G. Ciamician", Università di Bologna, via Selmi 2, 40126 Bologna, Italy, Dipartimento di Chimica Organica e Industriale, Università di Parma, via Usberti 17/a, 43100 Parma, Italy, and Center for Supramolecular Science, Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146-0431
Received July 19, 2007
Abstract:
The threading-dethreading of a photoinactive pH-switchable calix[6]arene bipyridinium pseudorotaxane in solution has been controlled by visible light irradiation using a merocyanine compound as a photoacid. The coupling between the two molecular switches that communicate with one another by intermolecular proton transfer provides a general principle for the operation of acid-base controllable molecular machines with light.
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