通过将空穴传输的二苯并呋喃或二苯并噻吩与电子传输的菲并咪唑基团连接起来,合成了两种具有D–π–A结构的蓝色荧光菲并咪唑衍生物(PhImFD和PhImTD)并进行了表征。非平面扭曲结构减少了分子聚集,这赋予了这两种化合物良好的热性能,成膜能力以及在CH 2 Cl 2和固态下的高量子产率。通过使用化合物PhImFD和PhImTD制造非掺杂有机发光二极管(OLED)作为发射器,并表现出令人鼓舞的表现。该设备显示出与委员会国际照明委员会(CIE)深蓝色的发射(0.15,0.11)为坐标PhImFD和(0.15,0.10)为PhImTD。PhImFD和PhImTD具有理想的双极主导特性,使器件的驱动电压低至3.6V。发现材料的能级与具有不同取代基的化合物中的供体单元有关。使用PhImTD作为发射层(EML)的设备B具有良好的能级和增强的电子传输能力,对于CE的效率为1.34 cd m -2,对于CE的效率为0
Synthesis and Reactivity of α‐Cumyl Bromodifluoromethanesulfenate: Application to the Radiosynthesis of [
<sup>18</sup>
F]ArylSCF
<sub>3</sub>
作者:Jiang Wu、Qunchao Zhao、Thomas C. Wilson、Stefan Verhoog、Long Lu、Véronique Gouverneur、Qilong Shen
DOI:10.1002/anie.201813708
日期:2019.2.18
A highly reactive electrophilic bromodifluoromethylthiolating reagent, α-cumyl bromodifluoro-methanesulfenate 1, was prepared to allow for direct bromodifluoromethylthiolation of aryl boron reagents. This coupling reaction takes place under copper catalysis, and affords a large range of bromodifluoromethylthiolated arenes. These compounds are amenable to various transformations including halogen exchange
Hydrogenation of (Hetero)aryl Boronate Esters with a Cyclic (Alkyl)(amino)carbene–Rhodium Complex: Direct Access to
<i>cis</i>
‐Substituted Borylated Cycloalkanes and Saturated Heterocycles
We herein report the hydrogenation of substituted aryl‐ and heteroaryl boronate esters for the selective synthesis of cis‐substituted borylated cycloalkanes and saturated heterocycles. A cyclic (alkyl)(amino)carbene‐ligated rhodium complex with two dimethyl groups at the ortho‐alkyl scaffold of the carbene showed high reactivity in promoting the hydrogenation, thereby enabling the hydrogenation of