合成并充分表征了一系列单分散的pyr改性的低碳咔唑。咔唑通过乙炔基的3位和6位连接,形成锯齿形分子骨架,并且由于溶液的共轭长度受限制,因此在溶液中观察到稳定的,尺寸无关的吸收和发射。含pyr的低聚物比没有quantum的低聚物表现出高得多的荧光量子产率。carb在低聚咔唑主链中的不同位置导致吸收光谱和发射光谱发生显着变化。此外,基于这些低聚物的具有四个不同架构(类型1-4)的器件被制造和研究。yr改性的咔唑低聚物表现出双功能性质(发光和空穴传输)。而且,这些设备表现出中等的性能;例如,基于Cz3PyCz3的外部量子效率为0.69%,在13.5 V时的最大亮度为1782 cd / m 2,这表明这些低聚物是有前途的光电材料。
Copper-Mediated Cyanation of Aryl Halides by Activation of Benzyl Cyanide as the Cyanide Source
作者:Qiaodong Wen、Jisong Jin、Yuncai Mei、Ping Lu、Yanguang Wang
DOI:10.1002/ejoc.201300052
日期:2013.7
Aryl nitriles were efficiently synthesized through copper-mediated cyanation of aryl halides using benzyl cyanide as the cyanide source. Aryl halides with various substituents on the aromatic ring afforded the corresponding aryl nitriles in 32–97 % yields (25 examples). This reaction could also be carried on a gram scale by using commercially available reagents. Additionally, a C–H bond oxidation and