標題: | Synthesis and Mesomorphic Properties of 2-(4-Alkyloxyphenyl)benzothiazoles |
作者: | Ha, Sie-Tiong Koh, Teck-Ming Yeap, Guan-Yeow Lin, Hong-Cheu Boey, Peng-Lim Win, Yip-Foo Ong, Siew-Teng Ong, Lay-Khoon 材料科學與工程學系 Department of Materials Science and Engineering |
關鍵字: | 2-(4-alkyloxyphenyl)benzothiazole;heterocycles;Smectic A;structure-property relationship |
公開日期: | 2009 |
摘要: | A homologous series of 2-(4-alkyloxyphenyl)benzothiazoles with an even number of carbons in the terminal alkoxyl chain was synthesized and characterized. The structure of the compounds was postulated using elemental analyses, FT-IR, NMR, and mass spectrometry techniques. Their liquid crystalline properties have been investigated by optical polarizing microscopy, DSC, and X-ray diffraction (XRD) techniques. Whilst the n-octyloxy to n-hexadecyloxy derivatives exhibited a monotropic smectic A phase, the n-ethoxy to n-hexyloxy and the n-octadecyloxy derivatives were not mesogenic. The mesomorphic properties of the present series were compared with other structurally related series to establish the chemical structure-mesomorphic properties relationship. |
URI: | http://hdl.handle.net/11536/7794 http://dx.doi.org/10.1080/15421400902987347 |
ISSN: | 1542-1406 |
DOI: | 10.1080/15421400902987347 |
期刊: | MOLECULAR CRYSTALS AND LIQUID CRYSTALS |
Volume: | 506 |
起始頁: | 56 |
結束頁: | 70 |
顯示於類別: | 期刊論文 |