Highly twisted pyrene derivatives for non-doped blue OLEDs
摘要:
New highly twisted rigid blue light-emitting materials were designed, composed of pyrene with a xylene core unit and either naphthalene or phenyl end units. These blue-emitting materials were synthesized via the Suzuki cross-coupling reaction and their structures were confirmed using FT-IR, H-1 NMR, C-13 NMR, and mass spectroscopy. The optical, electrochemical and thermal properties of the materials were investigated. The non-coplanar structure introduced by highly twisted xylene units provides steric hindrance, resulting in very deep blue emission. The fabricated devices exhibited a maximum external quantum efficiency (EQE) of 3.69% with CIE color coordinates (x, y: 0.15, 0.06). (C) 2016 Elsevier Ltd. All rights reserved.
Nickel-Catalyzed Regioselective Reductive Cross-Coupling of Aryl Halides with Polysubstituted Allyl Halides in the Presence of Imidazolium Salts
作者:Hongjun Ren、Zhan Zhang、Lijun Xu、Zhengkai Chen、Zhubo Liu、Maozhong Miao、Jinyu Song
DOI:10.1055/s-0035-1560531
日期:——
The nickel-catalyzed direct reductive cross-coupling of aryl halides with readily accessible polysubstituted allyl halides provides an efficient method for preparing diverse allylated arenes under mild conditions. Both allyl bromides and allyl chlorides are compatible with the transformation.
Disclosed are heterocyclic compounds and methods for their manufacture. The disclosed compounds are surprisingly potent and selective cannabinoids. Also disclosed are methods of using the disclosed compounds, including use of the disclosed compounds to stimulate a cannabinoid receptor, to provide a physiological effect in an animal or individual and to treat a condition in an animal or individual.