N-Heterocyclic carbene-borane radicals as efficient initiating species of photopolymerization reactions under air
Literature Information
Publication Date
2010-11-16
DOI
10.1039/C0PY00296H
Impact Factor
5.582
Authors
Mohamad-Ali Tehfe, Julien Monot, Malika Makhlouf Brahmi, Hélène Bonin-Dubarle, Dennis P. Curran, Max Malacria, Louis Fensterbank, Emmanuel Lacôte, Jacques Lalevée, Jean-Pierre Fouassier
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Abstract
Eight N-heterocyclic carbene-boranes (NHC-boranes) are proposed as new efficient co-initiators for acrylate photopolymerization reactions. They are particularly interesting in aerated conditions, where they help overcome the classical oxygen inhibition. The carbene boryl radicals that are the initiating species have been characterized by their transient absorption spectra obtained in laser flash photolysis (LFP) experiments. Rate constants for the generation of the carbene boryl radicals by hydrogen abstraction with t-butoxyl radical and triplet benzophenone as well as the reactions with oxygen, electron rich and electron poor alkenes, two alkyl halides (CHCl3 and iodopropane) and diphenyliodonium hexafluorophosphate have been measured. The reactivity of N-heterocyclic carbene borane radicals is clearly affected by the NHC substituent.
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Source Journal
Polymer Chemistry
CiteScore:
8.6
Self-citation Rate:
7.3%
Articles per Year:
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Polymer Chemistry welcomes submissions in all areas of polymer science that have a strong focus on macromolecular chemistry. Manuscripts may cover a broad range of fields, yet no direct application focus is required.
Recommended Compounds
Benzyl 3-(aminomethyl)piperidine-1-carboxylate hydrochloride
CAS Number:
1186663-23-9
Molecular Formula:
C14H21ClN2O2
4-Cyclohexene-1,2-dicarboxylic acid, 1,2-dimethyl ester, (1R,2R)-rel-
CAS Number:
17673-68-6
Molecular Formula:
C10H14O4
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