Crystals 2013, 3(2), 339-349; doi:10.3390/cryst3020339
Article

Influence of Mesogenic Properties of Cruciform-Shaped Liquid Crystals by Incorporating Side-Arms with a Laterally-Substituted-Fluorine

Received: 23 March 2013; in revised form: 6 May 2013 / Accepted: 20 May 2013 / Published: 30 May 2013
(This article belongs to the Special Issue Advances in Liquid Crystals)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Fluoro substitution in thermotropic liquid crystals provides a general way of modifying the properties of a parent system. Transition temperatures, mesophase types and other physical properties can be affected by fluoro substitution, so that frequently the behaviors of the parent compound can be manipulated and improved in a predictable manner. This paper discusses the effects of a fluoro substitution in each side-arm of 1,2,4,5-tetrakis((4-(alkoxy)phenyl)ethynyl)benzenes on the resulting mesomorphic properties characterized by optical polarizing microscopy and differential scanning calorimetry. Without any fluoro-substituted side-arms, longer chain-length leads to a wider nematic temperature range on cooling. Incorporation of a fluoro substitution in each side-arm induces the formation of a lamellar suprastructure, lowers transition temperatures and results in a wider mesophase temperature range on cooling.
Keywords: 1,2,4,5-tetraalkoxyphenylethynylbenzene (TPEB); cruciform-shaped; mesophase; smectic phase; nematic phase
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MDPI and ACS Style

Lin, Y.-H.; Ezhumalai, Y.; Yang, Y.-L.; Liao, C.-T.; Hsu, H.-F.; Wu, C. Influence of Mesogenic Properties of Cruciform-Shaped Liquid Crystals by Incorporating Side-Arms with a Laterally-Substituted-Fluorine. Crystals 2013, 3, 339-349.

AMA Style

Lin Y-H, Ezhumalai Y, Yang Y-L, Liao C-T, Hsu H-F, Wu C. Influence of Mesogenic Properties of Cruciform-Shaped Liquid Crystals by Incorporating Side-Arms with a Laterally-Substituted-Fluorine. Crystals. 2013; 3(2):339-349.

Chicago/Turabian Style

Lin, Yi-Hui; Ezhumalai, Yamuna; Yang, Yu-Ling; Liao, Ching-Ting; Hsu, Hsiu-Fu; Wu, Chunhung. 2013. "Influence of Mesogenic Properties of Cruciform-Shaped Liquid Crystals by Incorporating Side-Arms with a Laterally-Substituted-Fluorine." Crystals 3, no. 2: 339-349.

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