Author/Authors :
Mohamad-Ali Tehfe، نويسنده , , Mohamad-Ali and Lalevée، نويسنده , , Jacques and Telitel، نويسنده , , Sofia and Sun، نويسنده , , Jifu and Zhao، نويسنده , , Jianzhang and Graff، نويسنده , , Bernadette and Morlet-Savary، نويسنده , , Fabrice and Fouassier، نويسنده , , Jean-Pierre، نويسنده ,
Abstract :
Household LED bulbs and halogen lamps are used to promote the ring-opening photopolymerization of epoxides in the presence of a new series of iridium(III) complexes (IrCs) exhibiting enhanced visible light absorption properties through the introduction of a coumarin moiety. These latter complexes are used as catalyst photoinitiators in an oxidative cycle in combination with a silane and an iodonium salt. Remarkably, even under the selected very soft irradiations (e.g. light intensity lower than 2 mW/cm2), excellent polymerization profiles are obtained (conversions > 80%). The mechanisms are investigated by ESR and luminescence experiments.
