Synthesis of Fluorine-Containing Ferroelectric Liquid Crystals
Synthesis of Fluorine-Containing Ferroelectric Liquid Crystals
复制标题
含氟铁电液晶的合成
DOI：
10.1080/00268949108046590
复制
发表时间：
1991
影响因子：
0.7
通讯作者：
J. Seto
中科院分区：
文献类型：
--
作者：
S. Arakawa;K. Nito;J. Seto
摘要采用一种新的方法合成了不对称碳原子上含氟的铁电液晶。氨基酸L-异亮氨酸转化为（R，S）-α-氟化手性羧酸。使用该含氟羧酸容易合成联苯型和三苯基型液晶，其显示出对于联苯型为200 nC/cm 2和对于三苯基型为300 nC/cm 2的大的自发极化。还描述了由手性化合物和各种非手性近晶C（SmC）化合物组成的混合物的电光性质。
Abstract Ferroelectric liquid crystals having a fluorine atom at an asymmetric carbon were synthesized by means of a new method without hydrofluoric acid. An amino acid, L-isoleucine, is converted to (R,S)-α-fluorinated chiral carboxylic acid. Biphenyl and triphenyl type liquid crystals are easily synthesized using this fluorinated carboxylic acid, which show a large spontaneous polarization of 200 nC/cm2 for the biphenyl type and 300 nC/cm2 for the triphenyl type. The electro-optic properties of the mixtures consisting of the chiral compound and various non-chiral smectic C (SmC) compounds are also described.