title: Bis(germyl)ketones: Toward a New Class of Type I Photoinitiating Systems Sensitive Above 500 nm?
abstract: The ability of a bis(germyl)ketone Ph(3) GeCOGePh(3) to act as a photoinitiator of free radical polymerization under visible light is investigated. The results suggest that this compound could be the starting point of a new high performance class of photoinitiators. The excited state processes, as well as the generation and the reactivity of the germyl radicals, are studied by laser flash photolysis, ESR spin trapping experiments, and molecular orbital calculations; they are compared to the results obtained on a mono- (germyl)ketone CH(3) COGePh(3) . Time dependent density functional theory calculations allow discussion of the strongly red-shifted ground state absorption of Ph(3) GeCOGePh(3) .
authors: Department of Photochemistry, CNRS, University of Haute Alsace, ENSCMu, 68093 Mulhouse Cedex, France.
authors: Mahamad-Ali
authors: MA
authors: Tehfe
authors: Nicolas
authors: N
authors: Blanchard
authors: Cedric
authors: C
authors: Fries
authors: Jacques
authors: J
authors: Lalevée
authors: Xavier
authors: X
authors: Allonas
authors: Jean Pierre
authors: JP
authors: Fouassier