SYNTHESIS AND CHARACTERIZATION OF PHENYL ACETYLENE DERIVATIVES INCORPORATING A PERFLUOROALKYL GROUP, AND THE APPLICATION TO ELECTRONIC MATERIALS

本项目旨在开发含全氟烷基链和三键的新型液晶材料，对液晶相进行表征，并对液晶材料进行光反应。此外，我们还旨在研究这些液晶材料在有机溶剂中形成的聚集体。我们成功制备了10种新型液晶，并通过小角x射线衍射方法表征了近晶相的层状结构，发现全氟烷基链之间的亲氟相互作用对近晶a、B相的热性能和分子排列起主要作用。虽然在各种条件下考察了含单键液晶的光反应，但本工作考察的材料非常稳定，没有产生任何反应产物。本研究制备的液晶材料在有机溶剂中得到澄清，形成聚集体。聚集体的粒径取决于制备条件，在有机溶剂中聚集体的粒径约为0.5 ~ 1.0μm。有趣的是，即使液晶的浓度低于10mol %，这些颗粒也显示出液晶的性质。

This project aimed to develop new liquid crystal materials incorporationg a perfuloroalkyl chain and a triple bond, characterization of the liquid crystal phases, and also photo reaction of the liquid crystal materials. In addition, we also aimed to investigate the aggregates formed by these liquid crystal materials in organic solvents.We successfully prepared 10 kinds of new liquid crystals, and characterized the layer structure of smectic phases by a small angle X-ray diffraction method, and found that the fluorophilic interaction between the perfuloroalkyl chains plays a predominat role in determining the thermal properties and the molecular arrangement in the smectic A, and B phases. Although the photo reaction of the liquid crystals incorporating a **ple bond was examined by various conditions, the materials examined in this work were very stable and did not give any reaction products.The liquid crystal materials prepared in this work were clarified to give aggregates in organic solvents. The size of the aggregates are dependent on the condition of the preparation, and the size of the aggregates was determined to be ca. 0.5 -1.0μm in organic solvents. Interstingly, the particles reveal liquid crystal properties, even if the concentration of liquid crystals is less than 10 mol%.