STRUCTURE OF OPTICALLY-ACTIVE COMPOUNDS AND FERROELECTRIC PROPERTIES OF LIQUID-CRYSTALS

被引:45
作者
LOSEVA, M [1 ]
CHERNOVA, N [1 ]
RABINOVICH, A [1 ]
POZHIDAEV, E [1 ]
NARKEVICH, J [1 ]
PETRASHEVICH, O [1 ]
KAZACHKOV, E [1 ]
KOROTKOVA, N [1 ]
SCHADT, M [1 ]
BUCHECKER, R [1 ]
机构
[1] F HOFFMANN LA ROCHE & CO LTD,CH-4002 BASEL,SWITZERLAND
关键词
D O I
10.1080/00150199108221598
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A new series of optically active dipole dopants - diesters of 4,4-terphenyl dicarboxylic acid -have been prepared. Most of the components are high melting substances. Some of 2-chlorine substituted compounds show a chiral smectic C phase. The Ps value induced by optically active dipole dopants depends on several factors such as the magnitude of the dipole moment and the length of the alkyl tail at the C-atom, the degree to which rotations of the molecule and the chiral center are hindered. In some cases the experimental Ps value the of the FLC-mixture induced by a pair of dopants with same Ps sign and opposite helix handedness is higher than the sum of the Ps values induced by each dopant independently. © 1991 Gordon and Breach Science Publishers S.A.
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页码:357 / 377
页数:21
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