標題: Synthesis and Mesomorphic Properties of 4-(Methylthio)benzylidene-4 '-n-alkanoyloxyanilines
作者: Ha, Sie-Tiong
Lee, Teck-Leong
Yeap, Guan-Yeow
Lin, Hong-Cheu
Ito, Masato M.
Subramaniam, Ramesh T.
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: Thermotropic liquid crystal;Schiff base;Nematic;4-(Methylthio)benzylidene-4 '-n-alkanoyloxyanilines
公開日期: 1-Oct-2011
摘要: A homologous series of Schiff base esters, 4-(methylthio)benzylidene-4'-n-alkanoyloxyanilines possessing even number of carbon atoms at the alkanoyloxy chain (C(n-1)H(2n-1)COO, n = 2 to 18) was synthesized. The structure of the 4-(methylthio)benzylidene-4'-n-alkanoyloxyanilines was confirmed by elemental analysis and spectroscopic techniques including FT-IR, (1)H and (13)C NMR and EI-MS. Mesomorphic properties were evaluated by differential scanning calorimetry and polarizing optical microscopy techniques. Whilst n-butanoyloxy to n-octanoyloxy derivatives exhibited monotropic nematic phase, n-ethanoyloxy and n-decanoyloxy to n-octadecanoyloxy derivatives were non-mesogenic compounds. The mesomorphic properties of the present series were compared with other structurally related series to establish the chemical structure-mesomorphic property relationship.
URI: http://hdl.handle.net/11536/14767
ISSN: 0970-7077
期刊: ASIAN JOURNAL OF CHEMISTRY
Volume: 23
Issue: 10
起始頁: 4609
結束頁: 4612
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