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Cyclometallated Pt(II) Complexes in Visible‐Light Photoredox Catalysis: New Polymerization Initiating Systems
Author(s) -
Tehfe MohamadAli,
Ma Lihua,
Graff Bernadette,
MorletSavary Fabrice,
Fouassier JeanPierre,
Zhao Jianzhang,
Lalevée Jacques
Publication year - 2012
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201200489
Subject(s) - photopolymer , photochemistry , polymerization , chemistry , luminescence , polymer chemistry , moiety , acrylate , photoredox catalysis , polymer , hydrosilylation , flash photolysis , epoxide , materials science , catalysis , copolymer , photocatalysis , organic chemistry , kinetics , physics , optoelectronics , quantum mechanics , reaction rate constant
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.