SYNTHESIS AND MESOMORPHIC PROPERTIES OF SCHIFF BASE ESTERS <i>ORTHO</i>-HYDROXY-<i>PARA</i>-ALKYLOXYBENZYLIDENE-<i>PARA</i>-SUBSTITUTED ANILINES
作者:Guan-Yeow Yeap*、Sie-Tiong Ha、Phaik-Leng Lim、Peng-Lim Boey、Wan Ahmad Kamil Mahmood、Masato M. Ito、Shigeki Sanehisa
DOI:10.1080/15421400490494508
日期:2004.1.1
A series of new compounds o-n-hydroxy-p-n-hexadecanoyloxybenzylideneaniline and its substituted derivatives was synthesized from the esterification of palmitic acid with intermediary Schiff bases, which posssess various terminal substituents X(X=H, F, Cl, Br, OCH3 , CH3 , and C2H5). All compounds possess mesomorphic properties wherein compounds with X=H, F, Cl, Br, and OCH3 exhibit smectic A(SmA)phases and those with terminal substituents CH3 and C2H5 are monotropic liquid crystals showing smectic C phases(SmC). Correlation studies of the clearing temperature (T-c) of the title compounds and polarizability related to mesophase stability and molecular anisotropy are reported.