Get access

Subtle Ligand Effects in Oxidative Photocatalysis with Iridium Complexes: Application to Photopolymerization

Authors

  • Prof. Jacques Lalevée,

    Corresponding author
    1. Institut de Science des Matériaux de Mulhouse, IS2M, LRC CNRS 7228–ENSCMu-UHA, 15, rue Jean Starcky, 68057 Mulhouse Cedex (France)
    • Institut de Science des Matériaux de Mulhouse, IS2M, LRC CNRS 7228–ENSCMu-UHA, 15, rue Jean Starcky, 68057 Mulhouse Cedex (France)
    Search for more papers by this author
  • Dr. Mathieu Peter,

    1. Institut de Science des Matériaux de Mulhouse, IS2M, LRC CNRS 7228–ENSCMu-UHA, 15, rue Jean Starcky, 68057 Mulhouse Cedex (France)
    Search for more papers by this author
  • Dr. Frédéric Dumur,

    1. UMR 6264 Laboratoire Chimie Provence, Equipe CROPS, Université de Provence, Avenue Escadrille Normandie-Niemen, Case 542, Marseille 13397, Cedex 20 (France)
    Search for more papers by this author
  • Dr. Didier Gigmes,

    Corresponding author
    1. UMR 6264 Laboratoire Chimie Provence, Equipe CROPS, Université de Provence, Avenue Escadrille Normandie-Niemen, Case 542, Marseille 13397, Cedex 20 (France)
    • UMR 6264 Laboratoire Chimie Provence, Equipe CROPS, Université de Provence, Avenue Escadrille Normandie-Niemen, Case 542, Marseille 13397, Cedex 20 (France)
    Search for more papers by this author
  • Dr. Nicolas Blanchard,

    1. University of Haute Alsace, ENSCMu, Laboratory of Organic and Bioorganic Chemistry, 3 rue Alfred Werner, 68093 Mulhouse Cedex (France)
    Search for more papers by this author
  • Dr. Mohamad-Ali Tehfe,

    1. Institut de Science des Matériaux de Mulhouse, IS2M, LRC CNRS 7228–ENSCMu-UHA, 15, rue Jean Starcky, 68057 Mulhouse Cedex (France)
    Search for more papers by this author
  • Dr. Fabrice Morlet-Savary,

    1. Institut de Science des Matériaux de Mulhouse, IS2M, LRC CNRS 7228–ENSCMu-UHA, 15, rue Jean Starcky, 68057 Mulhouse Cedex (France)
    Search for more papers by this author
  • Prof. Jean Pierre Fouassier

    1. University of Haute Alsace, ENSCMu, 4 Rue des Frères Lumière, 68200 Mulhouse (France)
    Search for more papers by this author

Abstract

Iridium(III) complexes were designed and evaluated as efficient photoinitiators of polymerization reactions in combination with iodonium salts and silanes. Mechanistically, these reactions were shown to proceed through oxidative photoredox catalysis, generating aryl and silyl radicals under very soft irradiation conditions (blue LED, xenon lamp, and even sunlight). These radicals can initiate the free radical polymerization of acrylates or can be oxidized during the catalytic cycle to promote the ring-opening polymerization of epoxy monomers. Remarkably, both the (photo)chemical reactivity and the practical efficiency are dramatically affected by the ligands. In addition, the central role played by the oxidation ability of the excited state of the photocatalyst is discussed.

Get access to the full text of this article

Ancillary