Calamitic Liquid Crystalline Molecules with Lateral Intermolecular Hydrogen Bonding

Calamitic liquid crystalline amides 1-3 were synthesized and their thermodynamic behaviors were investigated. Bent-rod shaped compound 1 exhibited a usual smectic C phase. On the other hand, in the case of straight-rod compound 2, two kinds of smectic C phases (SmC x and SmC y ) were observed above...

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Published in:Molecular crystals and liquid crystals (Philadelphia, Pa. : 2003) Pa. : 2003), 2005-06, Vol.439 (1), p.173/[2039]-177/[2043]
Main Authors: Kohmoto, Shigeo, Yamamoto, Makoto, Kishikawa, Keiki, Kajitani, Takashi
Format: Article
Language:English
Subjects:
amide
chiral cubic
lateral intermolecular hydrogen bonding
liquid crystal
supra-structure
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container_title Molecular crystals and liquid crystals (Philadelphia, Pa. : 2003)
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creator Kohmoto, Shigeo
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description Calamitic liquid crystalline amides 1-3 were synthesized and their thermodynamic behaviors were investigated. Bent-rod shaped compound 1 exhibited a usual smectic C phase. On the other hand, in the case of straight-rod compound 2, two kinds of smectic C phases (SmC x and SmC y ) were observed above the crystal phase. Although SmC y phase belonged to general smectic C phases, SmC x phase exhibited very sharp lines in its schlieren textures. As the packing model of smectic C x phase, a lateral linear arrangement of the molecules was proposed to explain the difference between these smectic C phases. Additionally, in the case of 3 which has a flexible spacer between its amide group and straight rodlike core, the molecules generated the highly ordered smectic C (3a, SmC x ) and a chiral cubic phase (3b).
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source Taylor and Francis:Jisc Collections:Taylor and Francis Read and Publish Agreement 2024-2025:Science and Technology Collection (Reading list)
subjects amide
chiral cubic
lateral intermolecular hydrogen bonding
liquid crystal
supra-structure
title Calamitic Liquid Crystalline Molecules with Lateral Intermolecular Hydrogen Bonding
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