Aqueous electrochemically-triggered atom transfer radical polymerization

Simplified electrochemical atom transfer radical polymerization (seATRP) using Cu II - N -propyl pyridineimine complexes (Cu II (NPPI) 2 ) is reported for the first time. In aqueous solution, using oligo(ethylene glycol) methyl ether methacrylate (OEGMA), standard electrolysis conditions yield POEGM...

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Bibliographic Details
Published in:Chemical science (Cambridge) 2022-05, Vol.13 (19), p.5741-5749
Main Authors: Zhao, Boyu, Pashley-Johnson, Fred, Jones, Bryn A, Wilson, Paul
Format: Article
Language:English
Subjects:
Aqueous solutions
Chemistry
Electrolysis
Ethylene glycol
Molecular weight distribution
Polymerization
Radicals
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Summary:Simplified electrochemical atom transfer radical polymerization (seATRP) using Cu II - N -propyl pyridineimine complexes (Cu II (NPPI) 2 ) is reported for the first time. In aqueous solution, using oligo(ethylene glycol) methyl ether methacrylate (OEGMA), standard electrolysis conditions yield POEGMA with good control over molecular weight distribution ( m < 1.35). Interestingly, the polymerizations are not under complete electrochemical control, as monomer conversion continues when electrolysis is halted. Alternatively, it is shown that the extent and rate of polymerization depends upon an initial period of electrolysis. Thus, it is proposed that seATRP using Cu II (NPPI) 2 follows an electrochemically-triggered, rather than electrochemically mediated, ATRP mechanism, which distinguishes them from other Cu II L complexes that have been previously reported in the literature. Simplified electrochemical atom transfer radical polymerization (seATRP) using Cu II -pyridineimine complexes is reported and follows a previously unreported electrochemically triggered mechanism.
ISSN:2041-6520
2041-6539
DOI:10.1039/d2sc01832b