Photoinduction of Fast, Reversible Translational Motion in a Hydrogen-Bonded Molecular Shuttle

@article{Brouwer2001PhotoinductionOF,
  title={Photoinduction of Fast, Reversible Translational Motion in a Hydrogen-Bonded Molecular Shuttle},
  author={Albert M. Brouwer and C{\'e}line Frochot and Francesco G. Gatti and David A. Leigh and Loïc Mottier and Francesco Paolucci and Sergio Roffia and George W. H. Wurpel},
  journal={Science},
  year={2001},
  volume={291},
  pages={2124 - 2128}
}
A rotaxane is described in which a macrocycle moves reversibly between two hydrogen-bonding stations after a nanosecond laser pulse. Observation of transient changes in the optical absorption spectrum after photoexcitation allows direct quantitative monitoring of the submolecular translational process. The rate of shuttling was determined and the influence of the surrounding medium was studied: At room temperature in acetonitrile, the photoinduced movement of the macrocycle to the second… 

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