Two iridium(III) soft salts based on ion-paired dinuclear cationic and mononuclear anionic complexes were designed and investigated as phosphorescent emitters for solution processed OLEDs. New dinuclear cationiccomplexes were prepared with two different bridging ligands, a carbazole and a phenylene spacer. Best devices were designed with the soft salt bearing a carbazole moiety.
Photopolymerization of <i>N</i>-Vinylcarbazole Using Visible-Light Harvesting Iridium Complexes as Photoinitiators
作者:Jacques Lalevée、Frédéric Dumur、Cédric R. Mayer、Didier Gigmes、Gihane Nasr、Mohamad-Ali Tehfe、Sofia Telitel、Fabrice Morlet-Savary、Bernadette Graff、Jean Pierre Fouassier
DOI:10.1021/ma3005229
日期:2012.5.22
The photoredox catalysis approach is used to initiate the free radical promoted cationic photopolymerization of N-vinylcarbazole (NVK) under very soft irradiation conditions (halogen lamp, blue or green LED bulbs) using visible-light harvesting photocatalysts (mainly Ir(III) complexes) in iodonium salt and silane containing photoinitiating systems. The reactions were shown to proceed via an oxidative catalytic cycle where the generated free radicals are oxidized into cations. The effect of NVK on this catalytic cycle is discussed. Epoxy/NVK matrixes can also be polymerized. The luminescent properties of the synthesized polymers are presented.
applied GV1–6 as non‐viral genevectors for tracking DNA delivery in living cells by one‐ and two‐photon fluorescence microscopies. In two‐photon microscopy, a high signal‐to‐noise contrast was achieved by irradiation with an 830 nm laser. This is the first example of the use of transition‐metal complexes for two‐photon luminescenttracking of the cellular pathways of gene delivery and as DNA carriers