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Biasing reaction pathways with mechanical force

Author

Listed:
  • Charles R. Hickenboth

    (School of Chemical Sciences,)

  • Jeffrey S. Moore

    (School of Chemical Sciences,
    Department of Materials Science and Engineering,
    The Beckman Institute,)

  • Scott R. White

    (The Beckman Institute,
    University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA)

  • Nancy R. Sottos

    (Department of Materials Science and Engineering,
    The Beckman Institute,)

  • Jerome Baudry

    (School of Chemical Sciences,)

  • Scott R. Wilson

    (School of Chemical Sciences,)

Abstract

Feel the force For most chemical reactions to proceed the reactants need to surmount an energy barrier. The energy required is usually provided as heat, light, pressure or electrical potential. Now mechanical force can be added to that list: to the surprise of many a chemist, a reaction can literally be given a shove. In specially designed polymers subjected to ultrasound, rearrangement reactions are accelerated and reaction pathways can be biased to yield products not obtainable from heat- or light-induced reactions. The polymers contain a mechanophore positioned at a site where forces from extensional flow are greatest. Besides offering new ways of controlling chemical reactions, this work may also lead to mechanically adaptable materials, polymers that might generate a signal to warn of impending damage, undergo structure modification to slow the rate of damage, or even self-repair.

Suggested Citation

  • Charles R. Hickenboth & Jeffrey S. Moore & Scott R. White & Nancy R. Sottos & Jerome Baudry & Scott R. Wilson, 2007. "Biasing reaction pathways with mechanical force," Nature, Nature, vol. 446(7134), pages 423-427, March.
    • Handle: RePEc:nat:nature:v:446:y:2007:i:7134:d:10.1038_nature05681
    DOI: 10.1038/nature05681
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