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A Small Molecule that Walks Non-Directionally Along a Track Without External Intervention

Authors

  • Dr. Araceli G. Campaña,

    1. School of Chemistry, University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3 JJ (UK)
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  • Dr. Armando Carlone,

    1. School of Chemistry, University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3 JJ (UK)
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  • Dr. Kai Chen,

    1. School of Chemistry, University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3 JJ (UK)
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  • Dr. David T. F. Dryden,

    1. School of Chemistry, University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3 JJ (UK)
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  • Prof. David A. Leigh,

    Corresponding author
    1. School of Chemistry, University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3 JJ (UK)
    2. School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL (UK) http://www.catenane.net
    • School of Chemistry, University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3 JJ (UK)
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  • Urszula Lewandowska,

    1. School of Chemistry, University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3 JJ (UK)
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  • Dr. Kathleen M. Mullen

    1. School of Chemistry, University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3 JJ (UK)
    2. Current address: Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, 4001 (Australia)
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  • We thank Prof. Richard Lawton (University of Michigan) for many useful discussions and the EPSRC National Mass Spectrometry Service Centre (Swansea (UK)) for high resolution mass spectrometry. This research was funded by the ERC. A.G.C. thanks the Fundación Ramón Areces (Spain) for a postdoctoral fellowship.

Abstract

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Charge of the light brigade: A molecule is able to walk back and forth upon a five-foothold pentaethylenimine track without external intervention. The 1D random walk is highly processive (mean step number 530) and exchange takes place between adjacent amine groups in a stepwise fashion. The walker performs a simple task whilst walking: quenching of the fluorescence of an anthracene group sited at one end of the track.

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