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Cyclometallated Pt(II) Complexes in Visible‐Light Photoredox Catalysis: New Polymerization Initiating Systems |
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| Authors: | Mohamad‐Ali Tehfe Lihua Ma Bernadette Graff Fabrice Morlet‐Savary Jean‐Pierre Fouassier Jianzhang Zhao Jacques Lalevée |
| Affiliation: | 1. Institut de Science des Matériaux de Mulhouse IS2M–LRC CNRS 7228–ENSCMu‐UHA;2. 15, rue Jean Starcky, 68057 Mulhouse Cedex–France;3. State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, E‐208 West Campus, 2 Linggong Rd., Dalian 116024, China;4. UHA‐ENSCMu, 3 rue Alfred Werner 68093 Mulhouse |
| Abstract: | A household halogen lamp is used to promote the ring‐opening photopolymerization of epoxides in the presence of coumarin moiety containing Pt(II) complex/silane/iodonium salt combinations (epoxide/acrylate interpenetrated polymer networks can also be synthesized). Excellent polymerization profiles are obtained (conversions >70%) under this selected very soft irradiation. These Pt(II) complexes behave as photocatalysts in an oxidative cycle. A photoluminescent polymer can be in situ synthesized thanks to the luminescence properties of these complexes. The mechanisms are investigated by ESR, laser flash photolysis, and luminescence experiments. |
| Keywords: | cationic ring‐opening polymerization photocatalysts photoinitiators Pt(II) complexes silyl radicals |