教師資料查詢 | 類別: 期刊論文 | 教師: 徐秀福 Hsiu-fu Hsu (瀏覽個人網頁)

標題:Design and investigation of calamitic liquid crystals with low aspect-ratios : Rigid y-shaped 1,2,4-tris(4-alkoxyphenylethynyl)benzenes
學年94
學期1
出版(發表)日期2005/10/10
作品名稱Design and investigation of calamitic liquid crystals with low aspect-ratios : Rigid y-shaped 1,2,4-tris(4-alkoxyphenylethynyl)benzenes
作品名稱(其他語言)
著者Hsu, Hsiu-fu; Chen, S. J.; Kuo, C. H.; Wong, B. C.; Chiu, H. T.
單位淡江大學化學學系
出版者Cambridge: Royal Society of Chemistry (RSC)
著錄名稱、卷期、頁數Journal of materials chemistry 15(45), pp.4854-4861
摘要The synthesis and characterization of triynylbenzenes, 1-iodo-2,4,5-tri(4-alkoxyphenylethynyl)benzenes (1), are reported, and their structure–mesomorphism relationship is investigated. These compounds possess a y-shaped geometry with rigid linear spacers and a stable nematic phase that was achieved by lengthening the alkoxy chains or replacing the iodo group with a smaller atom. The low aspect ratios and identified calamitic nature of these rigid y-shaped liquid crystals make them suitable as potential candidates to be used in the liquid crystal layer of liquid crystal display devices for improving viewing angles. In addition, the geometry of 1 was modified stepwise from a rigid y-geometry to a rigid rectangle for realization of the unstable nematic behaviors of the previously reported board-like 1,2,4,5-tetrakis(4-tridecyloxyphenylethynyl)benzene that was expected to potentially show biaxial nematic phases. The sizes of the fourth side-arm and hence the aspect ratios of these tetra-substituted benzenes are ascribed to the less liquid crystallinity.
關鍵字
語言英文
ISSN0959-9428;1364-5501
期刊性質
收錄於SCI
產學合作
通訊作者Hsu, Hsiu-fu
審稿制度
國別
公開徵稿
出版型式電子版;紙本
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