Metal Complexes and Their Use as the Emitting Constituent in Electronic Components, in Particular in Electroluminescent Display Devices
申请人:Stössel Philipp
公开号:US20090292080A1
公开(公告)日:2009-11-26
The present invention describes new metal complexes. Such compounds can be used as functional materials in a variety of different applications which can in the broadest sense be considered part of the electronics industry.
The compounds of the invention have the formulae (1) and (1a).
Synthesis, Characterization, and Photophysical Properties of Iridium Complexes with an 8-Phenylquinoline Framework. The First Six-Membered Chelated Iridium Complexes for Electroluminance
作者:Hao-Chun Li、Pi-Tai Chou、Ya-Hui Hu、Yi-Ming Cheng、Rai-Shung Liu
DOI:10.1021/om049192n
日期:2005.3.1
A series of six-membered chelated iridium complexes bearing an 8-phenylquinoline framework have been prepared and characterized with an X-ray diffraction study. The photophysical properties of these complexes were examined with appropriate spectroscopic methods. The results, in combination with ab initio approaches, led us to clearly assign various electronic transition states. One salient feature for these red complexes is the appearance of a dual strong absorption band around 425-500 nm, which incorporates a state mixing between (MLCT)-M-1 and pi-pi* manifolds. These complexes show deep red phosphorescent emissions (650-680 nm), with short lifetimes of 1.7-3.0 mu s and moderate quantum yields of 0.05-0.11 in deaerated CH3CN. The electroluminance performance of these species shows a promising perspective in the OLED display. One representative, Ir[8-(3,5-difluorophenyl)quinoline](2)(acac) (4c), shows a eta(ext) value of 2.04% at J = 20 mA/cm(2) and the maximum brightness is 3427 cd/m(2) (x = 0.68, y = 0.32) with a full width at half-maximum of only 60 nm at 16 V, demonstrating the first six-membered chelated iridium complexes to suit applications in OLED devices.
Substrate‐Rhodium Cooperativity in Photoinduced
<i>ortho</i>
‐Alkynylation of Arenes
作者:Argha Saha、Animesh Ghosh、Srimanta Guin、Sanjib Panda、Dibya Kanti Mal、Abhirup Majumdar、Munetaka Akita、Debabrata Maiti
DOI:10.1002/anie.202210492
日期:2022.10.17
AbstractIn the realm of metallaphotocatalytic C−H activation strategy, the direct excitation of the transition metal which plays the dual role of light energy harnessing alongside performing the bond breaking and forming is a rare phenomenon. In this context we have developed the first photo‐induced Rh‐catalyzedortho‐alkynylation under ambient conditions without the requirement of silver salt, photocatalyst (PC) or any engineered substrate or catalyst. The transformation functions by the specific cooperative effect of a six‐membered rhodacycle which is the photo‐responsive species. The catalytic system allows the conjugation of arenes with sp3‐rich pharmacophoric fragments. The control experiments as well as the computational studies resolve the mechanistic intricacies for this transformation. An outer sphere electron transfer process from Rh to alkynyl radical is operative for the present photo‐induced transformation over the more common oxidative addition or 1,2‐migratory insertion pathways.
METALLKOMPLEXE UND DEREN VERWENDUNG ALS DIE EMITTIERENDE KOMPONENTE IN ELEKTRONISCHEN BAUTEILEN, BESONDERS IN ELEKTROLUMINESZENTEN ANZEIGEVORRICHTUNGEN