Photodissociation rate constants of new light sensitive alkoxyamines

Davy-Louis Versace; Jacques Lalevée; Jean-Pierre Fouassier; Yohann Guillaneuf; Denis Bertin; Didier Gigmes

doi:10.1002/marc.201000144

Photodissociation rate constants of new light sensitive alkoxyamines

Macromol Rapid Commun. 2010 Aug 3;31(15):1383-8. doi: 10.1002/marc.201000144. Epub 2010 Jun 22.

Authors

Davy-Louis Versace¹, Jacques Lalevée, Jean-Pierre Fouassier, Yohann Guillaneuf, Denis Bertin, Didier Gigmes

Affiliation

¹ Department of Photochemistry, CNRS, University of Haute Alsace, ENSCMu, 3 rue Alfred Werner, 68093 Mulhouse Cedex, France.

PMID: 21567541
DOI: 10.1002/marc.201000144

Abstract

The photochemical properties of two new photocleavable alkoxyamines bearing a benzophenone-derived chromophore were studied by electron spin resonance (ESR). The CO 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) ).