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Proceedings Paper

Molecular organization by head-to-tail recognition for polar liquid crystals
Author(s): Atsushi Yoshizawa; Tsuyoshi Narumi; Harutada Dewa; Shinobu Hatai; Norihisa Araake; Isa Nishiyama; Jun Yamamoto; Hiroshi Yokoyama
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Paper Abstract

Novel non-symmetric dimeric liquid crystal, 1-(4-cyanobiphenyl-4'-yloxy)-11-[2-(4-octylphenyl)pyrimidine-5-yloxy]undecane (8YP11OCB), has been prepared and the physical properties investigated by means of optical microscopy, differential scanning calorimetry (DSC), X-ray diffraction and dielectric measurements. The crystal structure has been determined to understand microscopic behavior of the compound. Electro-optical properties for 8YP11OCB were compared to those for 1-(4-cyanobiphenyl-4'-yloxy)-11-[4-(5-octylpyrimidine-2-yl)phenyl-4"-oxy]undecane (8PY11OCB). 8YP11OCB with smaller dielectric anisotropy than 8PY11OCB was found to show a lower threshold voltage in the smectic A phase than 8PY11OCB. Crystal structure of 8YP11OCB indicates that three types of core-core interactions exist and that the enthalpy gained by the specific interactions stabilizes the molecular packing with large free volume in the SmA phase.

Paper Details

Date Published: 5 January 2004
PDF: 9 pages
Proc. SPIE 5213, Liquid Crystals VII, (5 January 2004); doi: 10.1117/12.509185
Show Author Affiliations
Atsushi Yoshizawa, Hirosaki Univ. (Japan)
Tsuyoshi Narumi, Hirosaki Univ. (Japan)
Harutada Dewa, Hirosaki Univ. (Japan)
Shinobu Hatai, Hirosaki Univ. (Japan)
Norihisa Araake, Hirosaki Univ. (Japan)
Isa Nishiyama, Japan Science and Technology Corp. (Japan)
Jun Yamamoto, Japan Science and Technology Corp (Japan)
Hiroshi Yokoyama, Japan Science and Technology Corp. (Japan)

Published in SPIE Proceedings Vol. 5213:
Liquid Crystals VII
Iam-Choon Khoo, Editor(s)

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