New 3,4â²-disubstituted azobenzene-based mesogens with an azo group joined directly to the central benzene core have been synthesised and their liquid crystalline properties studied. Both molecular arms are gradually elongated by the insertion of a number of benzoate units between the central core and a terminal dodecyloxy chain. Then the lengths of the molecular arms and the overall shape are varied from a rod-like to a hockey-stick-like and bent-shape. Typical bent-shaped mesophases and electro-optical switching can be observed upon reaching a sufficient length of the molecular arms. We demonstrated how the mesoscale organization strictly depends on the molecular shape.
我们合成了一种新的 3,4â²-二取代
偶氮苯介聚物,其偶氮基团直接与中心苯核相连,并对其液晶特性进行了研究。通过在中心核心和末端
十二烷氧基链之间插入一些
苯甲酸单元,两个分子臂逐渐拉长。然后,分子臂的长度和整体形状从棒状变为曲棍球状和弯曲状。当分子臂达到足够的长度时,就能观察到典型的弯曲状介相和电光开关。我们证明了介观组织如何严格依赖于分子形状。