Development of novel liquid crystalline organic semiconductor using dendrimer

我们研究了以苯基萘为末端液晶基元的树枝状大分子的分子结构对液晶性质和载流子迁移率的依赖性。本研究合成的树枝状大分子均呈现出高度有序的近晶相，载流子迁移率高达10- 2cm ~ 2/Vs。末端烷基链较短的树枝状大分子呈现出双晶柱状相，载流子迁移率与近晶相相当。树枝状液晶分子结构的成功应用，为有机液晶半导体提供了稳定的液晶相和高的载流子迁移率，以及优良的分子设计。

We have investigated the dependence of molecular structure of dendrimers peripherally with phenylnaphthalene group as a terminal mesogen on liquid crystalline nature and carrier mobility. All the dendrimers synthesized in this study exhibited highly ordered smectic liquid crystalline phases, and generated a high carrier mobility 10-2cm2/Vs. The liquid crystalline dendrimers having short terminal alkyl chains showed a dicotic columnar phase, and generated same carrier mobility as the smectic phase. Liquid crystalline dendrimer structure successfully gave thermodynamically stable liquid crystalline phases and high carrier mobility, and excellent molecular design for organic liquid-crystalline semiconductor.