Synthesis and mesomorphic properties of Schiff base esters possessing terminal chloro substituent  

作　　者：Sie Tiong Ha Lay Khoon Ong Siew Ling Lee Hong Cheu Lin Yip Foo Win Siew Teng Ong 

机构地区：[1]Department of Chemical Science,Faculty of Science,Universiti Tunku Abdul Rahman,Jln Universiti,Bandar Barat,31900 Kampar,Perak,Malaysia [2]Department of Science,Faculty of Engineering & Science,Universiti Tunku Abdul Rahman,Jln Genting Klang,Setapak,53300 Kuala Lumpur,Malaysia [3]Ibnu Sina Institute for Fundamental Science Studies,Universiti Teknologi Malaysia,81310 UTM Skudai,Johor,Malaysia [4]Department of Materials Science & Engineering,National Chiao Tung University,Hsinchu 300,Taiwan,China

出　　处：《Chinese Chemical Letters》2010年第6期637-640,共4页中国化学快报（英文版）

基　　金：Universiti Tunku Abdul Rahman(UTAR) for the financial support through UTAR Vote No.6202/O05;the Malaysia Toray Science Foundation(UTAR Vote No.4359/000) for funding this project

摘　　要：A homologous series of Schiff base esters,4-chlorobenzylidene-4'-n-alkanoyloxyanilines,containing even number of carbons at the end groups of the molecules(C_(n-1)H_(2n-1)COO-,n=4,6,8,10,12,14,16) were synthesized.The mesomorphic properties were investigated by differential scanning calorimetry(DSC) and polarizing optical microscopy(POM).It was found that the end groups of the molecules had an effect on the mesomorphic properties.n-Butanoyloxy was found non-mesogenic,whilst n-hexanoyloxy exhibited monotropic smectic phase.The higher members in this homologous series were enantiotropic smectogens.A homologous series of Schiff base esters,4-chlorobenzylidene-4'-n-alkanoyloxyanilines,containing even number of carbons at the end groups of the molecules(C_(n-1)H_(2n-1)COO-,n=4,6,8,10,12,14,16) were synthesized.The mesomorphic properties were investigated by differential scanning calorimetry(DSC) and polarizing optical microscopy(POM).It was found that the end groups of the molecules had an effect on the mesomorphic properties.n-Butanoyloxy was found non-mesogenic,whilst n-hexanoyloxy exhibited monotropic smectic phase.The higher members in this homologous series were enantiotropic smectogens.

关 键 词：Schiff base esters Smectic A Smectic B Liquid crystal 

分 类 号：O621.25[理学—有机化学]