A series of highly Ï-conjugated nonsymmetrical liquid crystals, based on the core 3,5-(disubstituted)-1,2,4-oxadiazole with a shape similar to a hockey stick, were successfully synthesized by convergent Sonogashira coupling reaction between the building blocks of aryl iodides and the corresponding terminal arylacetylenes, using 3-[4-(decyloxy)phenyl]-5-(haloaryl)-1,2,4-oxadiazoles or decyl 4-iodobenzoate (10) and terminal arylacetylenes. This versatile synthetic route yielded luminescent mesogens with smectic and nematic phases, typical of calamitic compounds.
以 3,5-(二取代)-1,2,4-噁二唑为核心,成功合成了一系列高度Ï-共轭的非对称液晶,其形状类似曲棍球棒、的 3-[4-(癸氧基)苯基]-5-(卤代芳基)-
1,2,4-恶二唑或
4-碘苯甲酸癸酯 (10) 和末端芳基
乙炔,通过芳基
碘化物和相应末端芳基
乙炔构建模块之间的收敛性 Sonogashira 偶联反应,成功合成了这种液晶。这种多用途的合成路线产生了具有
钙钛矿化合物典型的熔融相和向列相的发光介质。