含蒽刚柔三嵌段低聚物的合成及自组装

Synthesis and Self-assembly of Triblock Oligomers Containing Anthracene Unit

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1H 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.

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.