| Surface Anchoring Stabilized High Strength Disclinations in Smectic C Phase of a Schiff-base Liquid Crystal |
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| 作者姓名： | 张其震 崔利 殷晓颖 |
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| 作者单位： | SchoolofChemistryandChemicalEngineering,ShandongUniversity,Jinan,Shandong250100,China |
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| 基金项目： | 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. |
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| 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), differential 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.
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| 关 键 词： | 碟状液晶分子相 西氟碱 液晶 高强度旋转位移 氢键 偏振光显微镜 差示扫描量热法 |
Surface Anchoring Stabilized High Strength Disclinations in Smectic C Phase of a Schiff-base Liquid Crystal |
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| ZHANG,Qi-Zhen CUI,Li YIN,Xiao-Ying School of Chemistry and Chemical Engineering,Shandong University,Jinan,Shandong ,China.Surface Anchoring Stabilized High Strength Disclinations in Smectic C Phase of a Schiff-base Liquid Crystal[J].Chinese Journal of Chemistry,2004,22(9):1039-1044. |
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| Authors: | ZHANG Qi-Zhen CUI Li YIN Xiao-Ying School of Chemistry and Chemical Engineering Shandong University Jinan Shandong China |
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| Institution: | ZHANG,Qi-Zhen CUI,Li YIN,Xiao-Ying School of Chemistry and Chemical Engineering,Shandong University,Jinan,Shandong 250100,China |
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| Abstract: | 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. |
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| Keywords: | high strength disclination smectic liquid crystal hydrogen bond |
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