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Published on: July 27, 2018
Structural effects on the photodissociation of alkoxyamines
Davy-Louis Versace1, Yohann Guillaneuf, Denis Bertin
1Département de Photochimie, CNRS, Université de Haute Alsace, ENSCMu, 3 rue Alfred Werner, 68093, Mulhouse, Cedex, France.
Abstract:
The search for photosensitive alkoxyamines represents a huge challenge. The key parameters governing the cleavage process remain unknown. The dissociation process of light sensitive alkoxyamines is studied as a function of their chemical structures. The photochemical properties of 6 selected compounds are investigated by ESR and laser flash photolysis. It is found that (i) the selectivity of the cleavable N-O vs. C-O bond and (ii) the efficiency of the nitroxide formation are strongly related to the alkoxyamine structure. The distance between the chromophore and the aminoxy group is a key parameter for an efficient pathway of the radical generation as displayed by the photopolymerization ability of these alkoxyamines.
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