The Effect of a Long Alkoxyl Group on the Mesomorphic Properties of 4-(4-Alkoxyphenoxycarbonyl)phenyl 3-Alkoxy-4-cyanobenzoates
作者:
Hiroaki Okamoto,
Atsushi Umeda,
Shunsuke Takenaka,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 1998)
卷期:
Volume 317,
issue 1
页码: 111-123
ISSN:1058-725X
年代: 1998
DOI:10.1080/10587259808047110
出版商: Taylor & Francis Group
关键词: Synthesis;thermal properties;lateral alkoxy group;polar liquid crystals;X-ray diffraction
数据来源: Taylor
摘要:
This paper describes syntheses and properties of some members of 4-(4-alkoxyphenoxycarbonyl)phenyl 3-alkoxy-4-cyanobenzoates. The ethoxy and propoxy groups at the adjacent position of the cyano one are unfavorable for the formation of a smectic A phase and the long alkoxy groups such as butoxy, pentyloxy, and hexyloxy ones facilitate the formation of a smectic C phase. The characterization and molecular arrangement of the smectic C phase were made by a differential scanning calorimeter, microscopic observation, and small-angle X-ray diffraction examination, and the roles of the alkoxyl group at the adjacent position of the cyano group on the mesomorphic properties are discussed.
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