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Two-colour light activated covalent bond formation

Author

Listed:
  • Sarah L. Walden

    (Queensland University of Technology (QUT)
    Queensland University of Technology (QUT))

  • Leona L. Rodrigues

    (Queensland University of Technology (QUT)
    Queensland University of Technology (QUT))

  • Jessica Alves

    (Queensland University of Technology (QUT)
    Queensland University of Technology (QUT))

  • James P. Blinco

    (Queensland University of Technology (QUT)
    Queensland University of Technology (QUT))

  • Vinh X. Truong

    (Queensland University of Technology (QUT)
    Queensland University of Technology (QUT))

  • Christopher Barner-Kowollik

    (Queensland University of Technology (QUT)
    Queensland University of Technology (QUT)
    Karlsruhe Institute of Technology (KIT))

Abstract

We introduce a photochemical bond forming system, where two colours of light are required to trigger covalent bond formation. Specifically, we exploit a visible light cis/trans isomerization of chlorinated azobenzene, which can only undergo reaction with a photochemically generated ketene in its cis state. Detailed photophysical mapping of the reaction efficiencies at a wide range of monochromatic wavelengths revealed the optimum irradiation conditions. Subsequent small molecule and polymer ligation experiments illustrated that only the application of both colours of light affords the reaction product. We further extend the functionality to a photo reversible ketene moiety and translate the concept into material science. The presented reaction system holds promise to be employed as a two-colour resist.

Suggested Citation

  • Sarah L. Walden & Leona L. Rodrigues & Jessica Alves & James P. Blinco & Vinh X. Truong & Christopher Barner-Kowollik, 2022. "Two-colour light activated covalent bond formation," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-30002-6
    DOI: 10.1038/s41467-022-30002-6
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    References listed on IDEAS

    as
    1. Kubra Kalayci & Hendrik Frisch & Vinh X. Truong & Christopher Barner-Kowollik, 2020. "Green light triggered [2+2] cycloaddition of halochromic styrylquinoxaline—controlling photoreactivity by pH," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    2. Martin Regehly & Yves Garmshausen & Marcus Reuter & Niklas F. König & Eric Israel & Damien P. Kelly & Chun-Yu Chou & Klaas Koch & Baraa Asfari & Stefan Hecht, 2020. "Xolography for linear volumetric 3D printing," Nature, Nature, vol. 588(7839), pages 620-624, December.
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    Cited by:

    1. Sarah L. Walden & Phuong H. D. Nguyen & Hao-Kai Li & Xiaogang Liu & Minh T. N. Le & Loh Xian Jun & Christopher Barner-Kowollik & Vinh X. Truong, 2023. "Visible light-induced switching of soft matter materials properties based on thioindigo photoswitches," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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