Contributions of the molecular species to the magnitude of the spontaneous polarization in ferroelectric liquid crystals
Contributions of the molecular species to the magnitude of the spontaneous polarization in ferroelectric liquid crystals
复制标题
分子种类对铁电液晶自发极化大小的贡献
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
J. Goodby
中科院分区：
文献类型：
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作者：
J. Patel;J. Goodby
摘要在某些含联苯基的铁电液晶中，自发极化相对于系统光轴的方向随温度而变化。因此，在特定导数的特征温度下，极化消失。一个模型的基础上存在的至少两个物种，相互转换通过激活障碍，提出了解释这种非凡的行为的极化。有人建议，这些物种是最有可能确定与这些材料的旋转构象，而它们是在其液晶状态。
Abstract In certain ferroelectric liquid crystals that contain the biphenylyl moiety, the spontaneous polarization undergoes a change in direction relative to the optical axis of the system as a function of temperature. Consequently, at a characteristic temperature for a particular derivative, the polarization vanishes. A model based on the presence of at least two species, interconvertible via an activation barrier is proposed to explain this extraordinary behaviour of the polarization. It is suggested that these species are most likely identified with the rotational conformers of these materials while they are in their liquid-crystalline states.