title: Light-harvesting organic photoinitiators of polymerization.
abstract: Two new photoinitiators with unprecedented light absorption properties are proposed on the basis of a suitable truxene skeleton where several UV photoinitiators PI units such as benzophenone and thioxanthone are introduced at the periphery and whose molecular orbitals MO can be coupled with those of the PI units: a red-shifted absorption and a strong increase of the molecular extinction coefficients (by a ≈ 20-1000 fold factor) are found. These compounds are highly efficient light-harvesting photoinitiators. The scope and practicality of these photoinitiators of polymerization can be dramatically expanded, that is, both radical and cationic polymerization processes are accessible upon very soft irradiation conditions (halogen lamp, LED…︁) thanks to the unique light absorption properties of the new proposed structures.
authors.affiliation: Institut de Science des Matériaux de Mulhouse, IS2M-LRC CNRS 7228-ENSCMu-UHA; 15, rue Jean Starcky, 68057 Mulhouse Cedex, France. jacques.lalevee@uha.fr
authors.forename: Jacques
authors.initials: J
authors.lastname: Lalevée
authors.forename: Mohamad-Ali
authors.initials: MA
authors.lastname: Tehfe
authors.forename: Frédéric
authors.initials: F
authors.lastname: Dumur
authors.forename: Didier
authors.initials: D
authors.lastname: Gigmes
authors.forename: Bernadette
authors.initials: B
authors.lastname: Graff
authors.forename: Fabrice
authors.initials: F
authors.lastname: Morlet-Savary
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Fouassier
mesh_terms: D008027:Light; D015394:Molecular Structure; D017319:Photosensitizing Agents / Q000737:chemistry*; D058105:Polymerization / Q000528:radiation effects
chemical_list: D017319:Photosensitizing Agents