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Photodissociation Rate Constants of New Light Sensitive Alkoxyamines
Author(s) -
Versace DavyLouis,
Lalevée Jacques,
Fouassier JeanPierre,
Guillaneuf Yohann,
Bertin Denis,
Gigmes Didier
Publication year - 2010
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201000144
Subject(s) - photopolymer , nitroxide mediated radical polymerization , chromophore , photodissociation , photochemistry , benzophenone , electron paramagnetic resonance , reaction rate constant , chemistry , kinetics , radical polymerization , polymerization , polymer , nuclear magnetic resonance , organic chemistry , physics , quantum mechanics
The photochemical properties of two new photocleavable alkoxyamines bearing a benzophenone‐derived chromophore were studied by electron spin resonance (ESR). The CO bond cleavage has been demonstrated and the photolysis rate constants ( k d ) determined over a large range of light intensity through the monitoring of the nitroxide concentration in aerated conditions. The obtained kinetic data highlight for the first time the linear dependence of k d on the light intensity for alkoxyamines: this should be a driving factor for nitroxide mediated radical photopolymerization (NMP 2 ).