Synthesis of polyphilic compounds Evidence for ferroelectricity in a non-chiral mesophase
作者:
F.G. Tournilhac,
L. Bosio,
J. Simon,
L.M. Blinov,
S.V. Yablonsky,
期刊:
Liquid Crystals
(Taylor Available online 1993)
卷期:
Volume 14,
issue 2
页码: 405-414
ISSN:0267-8292
年代: 1993
DOI:10.1080/02678299308027655
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The synthesis and properties of new mesomorphic ferroelectrics composed of nonchiral polyphilic molecules are described. Polyphilic molecular units are made up of a sequence of chemical fragments differing by their chemical nature. The segregation between unlike species is used to favour a polar packing. Ferroelectricity is demonstrated by the measurement of an acoustically induced piezoelectric response and the determination of repolarization currents. It is the first time that a ferroelectric repolarizable mesophase is obtained with non-chiral molecular units. The mechanism of ferroelectricity is therefore different from that found in conventional chiral smectic C.
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