Surface Anchoring Stabilized High Strength Disclinations in Smectic C Phase of a Schiff-base Liquid Crystal  

作　　者：张其震 崔利 殷晓颖 

机构地区：[1]School of Chemistry and Chemical Engineering, Shandong University,Jinan,Shandong 250100,China

出　　处：《Chinese Journal of Chemistry》2004年第9期1039-1044,共6页中国化学（英文版）

基　　金：the National Natural Science Foundation of China (Nos.29874020, 59573029), the Natural Science Foundation of Shandong Province of China and the Science Foundation of Polymer Physics Laboratory, the Chinese Academy of Sciences.

摘　　要：The observation of disclination cores of high strength S=-2, -3, -4, -5, -6, -7, -8 in a smectic C phase of Schiff-base type liquid crystal (LC) is reported. The results of polarizing optical microscope (POM), dif-ferential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXD) prove that the sample exhibits smectic C phase. It is suggested that the formation of the high strength disclination is mainly ascribed to the stronger anchoring of LC molecules on the substrate due to the formation of hydrogen bonds between the pendent hydroxyl of the LC molecule and the substrate.The observation of disclination cores of high strength S=-2, -3, -4, -5, -6, -7, -8 in a smectic C phase of Schiff-base type liquid crystal (LC) is reported. The results of polarizing optical microscope (POM), dif-ferential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXD) prove that the sample exhibits smectic C phase. It is suggested that the formation of the high strength disclination is mainly ascribed to the stronger anchoring of LC molecules on the substrate due to the formation of hydrogen bonds between the pendent hydroxyl of the LC molecule and the substrate.

关 键 词：high strength disclination smectic liquid crystal hydrogen bond 

分 类 号：O753.2[理学—晶体学]