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    题名: Stable, Low-Temperature Discotic Nematic Superstructures by Incorporating a Laterally Substituted Sidearm in Hexakis(phenylethynyl)benzene Discogens
    作者: Chien, Shih-chien;Chen, Hsiu-hui;Chen, Hsin-chou;Yang, Yu-ling;Hsu, Hsiu-fu;Shih, Tzenge-lien;Lee, Jey-jau
    贡献者: 淡江大學化學學系
    关键词: Liquid crystals;discotic;nematic;Mesogens;Structure-property relationships;Supramolecular materials
    日期: 2007-08
    上传时间: 2009-12-01
    出版者: Weinheim: Wiley - V C H Verlag GmbH & Co. KGaA
    摘要: A new strategy for preparing room-temperature discotic nematic materials is proposed and developed stepwise to improve various discotic nematic properties. This approach replaces one sidearm of the discotic hexakis(4-hexyloxyphenylethynyl)benzene with a tris(alkoxy) sidearm, 1-ethynyl-2,3,4-tris(hexyloxybenzene), to lower transition temperatures, manipulate discotic nematic ranges, and preserve the discotic nematic superstructure while preventing column formation. Although symmetry considerations play a role in the resulting mesogenic properties, steric hindrance and van der Waals interactions are ascribed to the superior discotic nematic properties of the newly prepared discogens containing a laterally substituted sidearm.
    關聯: Advanced Functional Materials 17(12), pp.1896-1902
    DOI: 10.1002/adfm.200601019
    显示于类别:[化學學系暨研究所] 期刊論文

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