Control of a Living Radical Polymerization of Methacrylates by Light


  • We thank the MRSEC program of the National Science Foundation (DMR 1121053, C.J.H.) and the Dow Chemical Company through the Dow Materials Institute at UCSB (B.P.F.) for financial support. B.P.F thanks the California NanoSystems Institute for the Elings Prize Fellowship in Experimental Science.


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On–off: A living radical polymerization procedure, which utilizes ppm levels of an iridium-based photoredox catalyst, affords control over chain growth through mediation by visible light (see scheme; Pn=polymer chain, X=halogen, M=monomer). This process can be activated and deactivated by light, enables control over the molecular weight and molecular weight distributions, and tolerates different functional groups.