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Issue 5, 2019
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Redox-switchable atom transfer radical polymerization

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Temporal control in atom transfer radical polymerization (ATRP) relies on modulating the oxidation state of a copper catalyst, as polymer chains are activated by L/CuI and deactivated by L/CuII. (Re)generation of L/CuI activator has been achieved by applying a multitude of external stimuli. However, switching the Cu catalyst off by oxidizing to L/CuII through external chemical stimuli has not yet been investigated. A redox switchable ATRP was developed in which an oxidizing agent was used to oxidize L/CuI activator to L/CuII, thus halting the polymerization. A ferrocenium salt or oxygen were used to switch off the Cu catalyst, whereas ascorbic acid was used to switch the catalyst on by (re)generating L/CuI. The redox switches efficiently modulated the oxidation state of the catalyst without sacrificing control over polymerization.

Graphical abstract: Redox-switchable atom transfer radical polymerization

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The article was received on 19 Nov 2018, accepted on 12 Dec 2018 and first published on 19 Dec 2018

Article type: Communication
DOI: 10.1039/C8CC09209E
Chem. Commun., 2019,55, 612-615

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    Redox-switchable atom transfer radical polymerization

    S. Dadashi-Silab, F. Lorandi, M. Fantin and K. Matyjaszewski, Chem. Commun., 2019, 55, 612
    DOI: 10.1039/C8CC09209E

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