Flexible taper-shaped liquid crystal trimer exhibiting a modulated smectic phase
Flexible taper-shaped liquid crystal trimer exhibiting a modulated smectic phase
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具有调制近晶相的柔性锥形液晶三聚体
DOI:
10.1080/02678292.2014.950353
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
and A. Yoshizawa
中科院分区:
文献类型:
--
作者:
S. Kashima;Y. Takanishi;J. Yamamoto;and A. Yoshizawa
We prepared some taper-shaped liquid-crystalline trimers in which two phenylpyrimidine units and a 1,4-diphenyl-2,3-difluorobenzene unit are connected to 2,4-dihdroxy benzoic acid via flexible spacers. We then investigated their liquid-crystalline properties using polarised optical microscopy, differential scanning microscopy and X-ray diffraction. 6-[4–(5-Octylpyrimidin-2-yl)phenyloxy]hexyl 2-{7-{4-[4–(4-hexylphenyl)-2,3-difluorophenyl]phenyloxy}heptanoyloxy}-4-{6-[4–(5-octylpyrimidin-2-yl)phenyloxy]hexyloxy}benzoate (1) was found to exhibit a phase sequence of isotropic liquid – nematic – intercalated smectic A – intercalated anticlinic smectic C – modulated smectic C. The structure–property relation in the taper-shaped trimers reveals that the modulated phase is induced by competition between an intercalated structure stabilised by dipole–dipole interaction and a monolayer structure by packing entropy effects. Conformational change of compound1induced by intermolecular interactions plays an important role in the phase transition behaviour.
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影响因子:
0.7
作者:
A. D. Vries
通讯作者:
A. D. Vries
影响因子:
56.9
作者:
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通讯作者:
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1980
期刊:
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通讯作者:
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--
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通讯作者:
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DOI:
10.1051/jp2:1997184
发表时间:
1997
期刊:
Journal De Physique Ii
影响因子:
--
作者:
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通讯作者:
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