Department of Frontier Materials Chemistry, Graduate School of Science and Technology, Hirosaki University, 3, Bunkyo-cho, Hirosaki 036-8561, Japan.
J Phys Chem B. 2009 Dec 17;113(50):16124-30. doi: 10.1021/jp907291b.
A chiral liquid crystal oligomer, (R)-1-methylheptyl 4'-{8-[4-(5-octylpyrimidin-2-yl)phenyloxy]octanoyloxy}biphenyl-4-carboxylate, was prepared. Its physical properties were investigated using optical microscopy, differential scanning calorimetry, and X-ray diffraction. The oligomer was found to exhibit two ferrielectric smectic C phases with a wide temperature range between ferroelectric and antiferroelectric smectic C phases. Furthermore, ferrielectric-like ordering was observed in a racemic mixture of the enantiomers. The oligomeric effect can produce highly chirality-dependent ordering in the racemic system.
一种手性液晶低聚物，（R）-1-甲基庚基 4'-{8-[4-（5-辛基嘧啶-2-基）苯氧基]辛酰氧基}联苯-4-羧酸酯，被制备出来。使用光学显微镜、差示扫描量热法和 X 射线衍射对其物理性质进行了研究。发现该低聚物在铁电和反铁电近晶 C 相之间具有很宽的温度范围，表现出两个铁电近晶 C 相。此外，在对映异构体的外消旋混合物中观察到类似铁电的有序性。低聚物效应可以在外消旋体系中产生高度依赖于手性的有序性。
