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Photoregulation of Luminescence Quenching in Photochromic Porphyrin–Phenoxynaphthacene- quinone Copolymers


  • This work was supported by the Natural Sciences and Engineering Research Council of Canada, the Canada Research Chairs Program, the Canadian Foundation for Innovation, the B.C. Knowledge Development Fund, and Simon Fraser University.


Fluorescence is reversibly photoregulated in high-density random copolymers constructed from photochromic phenoxynaphthacenequinones and porphyrins (see Figure) using ring-opening metathesis polymerization. Alternating irradiation of the polymers with ultraviolet and visible light toggles the photochromic components between two isomers differing in their ability to act as electron-acceptors in a photoinduced electron-transfer process.

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