Tetrakis(oxadiazolylphenyl)pyrazines: New St. Andrew′s Cross‐Shaped Liquid Crystals
作者:Nico Röder、Tomasz Marszalek、Daniel Limbach、Wojciech Pisula、Heiner Detert
DOI:10.1002/cphc.201800936
日期:2019.2.4
fourfold Huisgen reaction. Four 2,5‐diaryl‐1,3,4‐oxadiazol arms are attached to a central pyrazine nucleus. These fluorescent stars, when decorated with a rim of eight alkoxy side chains are discotic liquid crystals. Depending on the substitution pattern, the width of the liquid phase varies within a broad range of 25 °C to 250 °C. In their liquid crystalline phase, the molecules assemble in a typical
通过四重Huisgen反应合成了具有圣安德鲁十字形状的π共轭分子。四个2,5-二芳基-1,3,4-恶二唑臂连接到中央吡嗪核。当这些荧光星装饰有八个烷氧基侧链的边缘时,它们是盘状液晶。取决于取代模式,液相的宽度在25℃至250℃的宽范围内变化。在其液晶相中,分子以典型的六边形柱状超分子排列组装。