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

doi:10.3390/cryst3020339

淡江大學機構典藏 > 理學院 > 化學學系暨研究所 > 期刊論文 > Item 987654321/91693

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题名:	Influence of Mesogenic Properties of Cruciform-Shaped Liquid Crystals by Incorporating Side-Arms with a Laterally-Substituted-Fluorine
作者:	Lin, Yi-Hui;Yamuna Ezhumalai;Yang, Yu-Ling;Liao, Ching-Ting;Hsu, Hsiu-Fu;Wu, Chunhung
贡献者:	淡江大學化學學系
关键词:	1,2,4,5-tetraalkoxyphenylethynylbenzene (TPEB);cruciform-shaped;mesophase;smectic phase;nematic phase
日期:	2013-05-30
上传时间:	2013-07-25 19:56:13 (UTC+8)
出版者:	Basel: M D P I AG
摘要:	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.
關聯:	Crystals 3(2), pp.339-349
DOI:	10.3390/cryst3020339
显示于类别:	[化學學系暨研究所] 期刊論文

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