Metal-Free Atom Transfer Radical Polymerization

Overcoming the challenge of metal contamination in traditional ATRP systems, a metal-free ATRP process, mediated by light and catalyzed by an organic-based photoredox catalyst, is reported. Polymerization of vinyl monomers are efficiently activated and deactivated with light leading to excellent con...

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Published inJournal of the American Chemical Society Vol. 136; no. 45; pp. 16096 - 16101
Main Authors Treat, Nicolas J, Sprafke, Hazel, Kramer, John W, Clark, Paul G, Barton, Bryan E, Read de Alaniz, Javier, Fors, Brett P, Hawker, Craig J
Format Journal Article
LanguageEnglish
Published WASHINGTON American Chemical Society 12.11.2014
Amer Chemical Soc
Subjects
Chemistry
Chemistry, Multidisciplinary
Physical Sciences
Science & Technology
VISIBLE-LIGHT
ORGANIC-SYNTHESIS
ELECTRON-TRANSFER
TEMPERATURE
OXYGEN TOLERANCE
COMPLEXES
LIGHT PHOTOREDOX CATALYSIS
METHACRYLATE
EXCHANGE
PET-RAFT POLYMERIZATION
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Summary:Overcoming the challenge of metal contamination in traditional ATRP systems, a metal-free ATRP process, mediated by light and catalyzed by an organic-based photoredox catalyst, is reported. Polymerization of vinyl monomers are efficiently activated and deactivated with light leading to excellent control over the molecular weight, polydispersity, and chain ends of the resulting polymers. Significantly, block copolymer formation was facile and could be combined with other controlled radical processes leading to structural and synthetic versatility. We believe that these new organic-based photoredox catalysts will enable new applications for controlled radical polymerizations and also be of further value in both small molecule and polymer chemistry.
Bibliography:ObjectType-Article-1
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ISSN:0002-7863
1520-5126
DOI:10.1021/ja510389m