A selenium‐catalyzed carbonylative reaction for the synthesis of 2‐benzimidazolones from 2‐nitroanilines has been developed. In this strategy, to avoid the usage of toxic CO gas, TFBen (benzene‐1,3,5‐triyl triformate) was used as a solid and stable CO precursor, and a variety of desired 2‐benzimidazolones were produced in moderate to excellent yields.
A new series of N -substituted tetraphenylethene-based benzimidazoles: Aggregation-induced emission, fast-reversible mechanochromism and blue electroluminescence
作者:Tengfei Zhang、Ran Zhang、Yun Zhao、Zhonghai Ni
DOI:10.1016/j.dyepig.2017.09.018
日期:2018.1
property with solid-state fluorescence change between blue and yellow-green. They are thermally stable with decomposition temperatures above 319 °C. Both of multilayer electroluminescence devices fabricated with compounds 3b and 3c as emitters are blue emission. The turn-on voltage of device based on compound 3b is 3.3 V with maximum luminance and current efficiency of 2470 cd/m2 and 1.48 cd/A, respectively
四种新的基于N-取代的四苯基乙烯的苯并咪唑N -R-2-(4-(1,2,2-三苯基乙烯基)苯基)-1 H-苯并[ d ]咪唑(R =苯基(3a),R = 4-通过4-四苯基乙醛与N-取代的邻位环化反应方便地合成了(叔丁基)苯基(3b),R = 正丁基(3c),R = 正己基(3d))。-硝基苯胺。这四种化合物表现出典型的聚集诱导发射(AIE)特性,具有较高的固态绝对荧光量子产率(38.1–65.7%),并且具有快速恢复的机械致变色特性,其中固态荧光在蓝绿色和黄绿色之间变化。它们在分解温度高于319°C时具有热稳定性。用化合物3b和3c作为发射体制造的多层电致发光器件都是蓝色发射。基于化合物3b的设备的开启电压为3.3 V,最大亮度和电流效率分别为2470 cd / m 2和1.48 cd / A。
Palladium(0)-Catalyzed Amination, Stille Coupling, and Suzuki Coupling of Electron-Deficient Aryl Fluorides
作者:Young Mi Kim、Shu Yu
DOI:10.1021/ja028966t
日期:2003.2.19
coupling in the presence of Pd(PPh3)4, and the reactions afforded the coupling products in 28-86% yields. The control experiments showed no sign of reaction in the absence of palladium. These results were in agreement with the oxidative addition/reductive elimination pathway, where the oxidative addition could conceivably proceed via the SNAr mechanism.
申请人:LG CHEM, LTD. 주식회사 엘지화학(120010134563) Corp. No ▼ 110111-2207995BRN ▼107-81-98139
公开号:KR101622443B1
公开(公告)日:2016-05-18
본 발명은 유기 발광소자의 인광성 청색 발광소재로 사용가능한 신규한 벤즈이미다졸-카바졸 유도체 및 이의 제조방법에 관한 것으로, 본 발명에 따른 신규한 벤즈이미다졸-카바졸 유도체는 전자주개인 카바졸과 전자받개인 벤즈이미다졸을 포함하고 있어 청색의 인광을 발광하기에 충분한 에너지를 가지므로 청색에 해당하는 좋은 색좌표를 나타내며, 열적 안정성 및 형태적 안정성이 우수하여 유기 발광소자용 박막으로 제조할 경우, 고온에서도 소자의 물리적 성질의 변화없이 우수한 발광 성능을 유지할 수 있으므로, 이를 이용한 유기 발광소자용 발광소재로 유용하게 사용될 수 있다.