Abstract

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.

Keywords

PhotopolymerPhotochemistryPhotocatalysisRadicalPolymerizationChemistryReactivity (psychology)IridiumMonomerCatalysisPhotoredox catalysisSilanesPolymer chemistrySilylationOrganic chemistryPolymer

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Publication Info

Year
2011
Type
article
Volume
17
Issue
52
Pages
15027-15031
Citations
169
Access
Closed

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Cite This

Jacques Lalevée, Mathieu Peter, Frédéric Dumur et al. (2011). Subtle Ligand Effects in Oxidative Photocatalysis with Iridium Complexes: Application to Photopolymerization. Chemistry - A European Journal , 17 (52) , 15027-15031. https://doi.org/10.1002/chem.201101445

Identifiers

DOI
10.1002/chem.201101445
PMID
22124944

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Data completeness: 77%