Advanced Materials

Control of Rapid Formation of Interchain Excited States in Sugar-Threaded Supramolecular Wires

Authors

  • Annamaria Petrozza,

    1. Department of Physics and Astronomy, University College London Gower Street, London, WC1E 6BT (UK)
    2. London Centre for Nanotechnology, Gower Street, London, WC1E 6BT (UK)
    3. Department of Physics, Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge, CB3 0HE (UK)
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  • Sergio Brovelli,

    1. Department of Physics and Astronomy, University College London Gower Street, London, WC1E 6BT (UK)
    2. London Centre for Nanotechnology, Gower Street, London, WC1E 6BT (UK)
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  • Jasper J. Michels,

    1. Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA (UK)
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  • Harry L. Anderson,

    1. Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA (UK)
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  • Richard H. Friend,

    1. Department of Physics, Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge, CB3 0HE (UK)
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  • Carlos Silva,

    1. Département de physique & Regroupement québécois, sur les matériaux de pointe, Université de Montréal C.P. 6128, Succ. centre-ville, Montréal, QC H3C 3J7 (Canada)
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  • Franco Cacialli

    Corresponding author
    1. Department of Physics and Astronomy, University College London Gower Street, London, WC1E 6BT (UK)
    2. London Centre for Nanotechnology, Gower Street, London, WC1E 6BT (UK)
    • Department of Physics and Astronomy, University College London Gower Street, London, WC1E 6BT (UK).
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  • We thank the EPSRC, the Royal Society and the European Commission (THREADMILL – MRTN-CT-2006-036040) for financial support. C.S. acknowledges support from the National Science and Engineering Research Council (NSERC) and the Canada Research Chairs Programme. This work was also partially supported, as part of the European Science Foundation EUROCORES Programme SONS, from funds by the EPSRC and the EC Sixth Framework Programme, under contract N. ERAS-CT-2003-980409. Supporting Information is available online from Wiley InterScience or from the authors.

Abstract

The time-resolved photoluminescence of cyclodextrin-threaded conjugated molecular wires and their unthreaded analogues is studied to probe suppression of intermolecular interactions by supramolecular encapsulation. The polyrotaxane dynamics are exponential and independent of concentration, different from those of unthreaded semiconductors, which display instead optical signatures of interchain species. This is fundamental insight into the photophysics of semiconducting polymers, and crucial for the development of organic electronics.

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