含蒽刚柔三嵌段低聚物的合成及自组装

摘要

Rod-coil molecules, consisting of a flexible and a rigid block, have a strong tendency to self-organize into a various supramolecular nanostructures in the bulk state. Coil-rod-coil triblock cruciform com-pounds 1 and 2 incorporating anthracene unit were synthesized through Sonogashira coupling reaction. Molecu-lar structures of these compounds were characterized by 1 H NMR and MALDI-TOF mass spectroscopy. The self-assembling behaviors of these molecules were investigated by means of differential scanning calorimetry ( DSC) , thermal polarized optical microscopy( POM) , small-angle and wide-angle X-ray scattering( SAXS and WAXS) at the bulk state. In liquid crystalline mesophase, compounds 1 connecting with poly( ethylene ox-ide) ( PEO) as flexible chains self-assembles into oblique columnar phase ( Colo ) and nematic phase, while compound 2 containing alkyl flexible chain self-assembles into lamellar structure(L) in the solid state, and has not shown liquid crystalline phase.%通过Sonogashira偶联等反应，合成了2种含蒽的三嵌段十字型化合物1和2；通过1 H NMR和基质辅助激光解吸电离时间飞行质谱( MALDI-TOF MS)对其结构进行了表征。利用差示扫描量热法( DSC)、偏光显微镜( POM)及小角X射线散射实验( SAXS)对2种化合物的本体自组装行为进行了研究。结果表明，在本体状态下，连接聚环氧乙烷( PEO)作为柔性链的化合物在液晶中间相自组装成倾斜柱状相和向列相，以烷基链为柔性链的化合物未形成液晶相，在固态相是层状结构。