Operation Mechanism of a Molecular Machine Revealed Using Time-Resolved Vibrational Spectroscopy

Author:

Panman Matthijs R.1,Bodis Pavol1,Shaw Daniel J.1,Bakker Bert H.1,Newton Arthur C.1,Kay Euan R.2,Brouwer Albert M.1,Buma Wybren Jan1,Leigh David A.2,Woutersen Sander1

Affiliation:

1. Van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, Netherlands.

2. School of Chemistry, University of Edinburgh, King’s Buildings, West Mains Road, Edinburgh EH9 3JJ, UK.

Abstract

Not So Random Walk In rotaxanes, a molecular ring can shuttle back and forth between docking sites along an axle. Panman et al. (p. 1255 ) traced the intricacies of this shuttling motion using vibrational spectroscopy. The kinetics were dominated by the slow scission of hydrogen bonds tying the ring to its starting site. Varying the length of the axle allowed the extraction of relative rates for forward and backward motion once the ring was free: Somewhat surprisingly, forward motion toward the destination site was slightly hindered relative to regression toward the starting place.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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