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N-Heterocyclic Carbene Boranes Accelerate Type I Radical Photopolymerizations and Overcome Oxygen Inhibition

To protect and serve: The efficiency of Type I radical photoinitiators for acrylate polymerization is greatly increased by the presence of NHC‐boranes. Conversion of the initially photogenerated radicals, R. (see scheme), into strongly nucleophilic NHC‐boryl radicals, through hydrogen‐atom transfer,...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2012-06, Vol.51 (24), p.5958-5961
Main Authors: Lalevée, Jacques, Telitel, Sofia, Tehfe, Mohamad Ali, Fouassier, Jean Pierre, Curran, Dennis P., Lacôte, Emmanuel
Format: Article
Language:English
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Summary:To protect and serve: The efficiency of Type I radical photoinitiators for acrylate polymerization is greatly increased by the presence of NHC‐boranes. Conversion of the initially photogenerated radicals, R. (see scheme), into strongly nucleophilic NHC‐boryl radicals, through hydrogen‐atom transfer, gives a better matched radical for subsequent reaction with monomer, ensuring better initiation.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201200975