Molecule-scale structure effects at organic light-emitting diodes (OLED) anode-organic transport layer interfaces are probed via a self-assembly approach. A series of ITO anode-linked silyltriarylamine molecules differing in aryl group and linker density are synthesized for this purpose and used to probe the relationship between nanoscale interfacial chemical structure, charge injection and electroluminescence properties. Dramatic variations in hole injection magnitude and OLED performance can be correlated with the molecular structures and electrochemically derived heterogeneous electron-transfer rates of such triarylamine fragments, placed precisely at the anode-hole transport layer interface. Very bright and efficient ( approximately 70 000 cd/m2 and approximately 2.5% forward external quantum efficiency) OLEDs have thereby been fabricated.
of carbon-carbon doublebonds is a central component of chemical manufacturing. One useful trick is to shift hydrogen atoms around to interconvert C=C isomers selectively. However, this approach typically requires precious metals. Kapat et al. now report that more-abundant nickel can catalyze rapid conversion of terminal olefins into internal olefins with high selectivity for trans geometry. The odd-electron
[EN] ISOMERIZATION OF ALKENES<br/>[FR] ISOMÉRISATION D'ALCÈNES
申请人:RWTH AACHEN
公开号:WO2020058505A1
公开(公告)日:2020-03-26
The present invention relates to an isomerization method for alkenes, comprising of reaction an alkene with a Ni(I)-compound. By this method, E-Alkenes are obtained in excellent yield.
Let's coordinate: Copper(I)‐catalyzed cross‐coupling of alkenyl‐ and arylsilanes with primary alkyl iodides as well as allylic and benzylic halides as C(sp3)X electrophilic coupling partners has been realized by intramolecular activation through alkoxide coordination. This alkylation tolerates a range of functional groups including a free hydroxy group. IPr=1,3‐bis(2,6‐diisopropylphenyl)imidazol‐2‐ylidene
A universal host material with a simple structure for monochrome and white phosphorescent/TADF OLEDs
作者:Chao Wu、Binyan Wang、Yafei Wang、Jianyong Hu、Jiaxing Jiang、Dongge Ma、Qiang Wang
DOI:10.1039/c8tc05259j
日期:——
development of universal hostmaterials suitable for both phosphorescent and thermally activated delayed fluorescent (TADF) emitters is still a bottleneck for fabricating highly efficient full-color and white organic light-emittingdiodes (OLEDs) with a simple device structure. In this paper, two novel donor–acceptor type bipolar hybrids with simple molecular structures, 4′-(diphenylamino)-[1,1′-biphenyl]-4-carbonitrile