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題名 | 新型非旋光性彎曲型液晶合成與探討=Systhesis and Characterization of Achiral Novel Bent-Core Liquid Crystals |
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作者 | 鄒幸芳; 廖健同; 李俊毅; | 書刊名 | 技術學刊 |
卷期 | 26:1 2011.03[民100.03] |
頁次 | 頁51-58 |
分類號 | 333.12 |
關鍵詞 | 層列型液晶相; 彎曲型液晶; 澄清點; SmCP; Bent-core liquid crystals; Clear point; |
語文 | 中文(Chinese) |
中文摘要 | 本研究目的為合成新型彎曲型液晶,其核心結構為 3, 4位置雙苯環 (3,4′-biphenyldiol),並於核心結構加上取代基 (氟或氯),觀察對液晶相轉移行為所造成的影響並加以探討。 然而,本結構的彎曲型液晶可破壞分子間的堆疊進而降低熔點並利用苯環 上的取代基增大極化值,使分子與分子間的作用力上升增加液晶相溫度範圍。相較於以往之彎曲型液晶的 SmCP相,本結構具有較低的澄清點溫度與穩定的層列型液晶相 (smectic CP, SmCP)。 液晶相特性的研究方法可經由偏光顯微鏡 (polarizing optical microscope, POM)、示差掃瞄式卡計 (differential scanning calorimeter, DSC)、X光射線繞 射儀 (X-ray diffractometer, XRD) 以及光電量測等來進行研究。 |
英文摘要 | The purpose of this study was to design the synthesis of new bent-core liquid crystals, with core structures of 3, 4-position pairs of benzene rings (3,4′-biphenyldiol), and core structures with substituents (fluorine or chlorine), to observe the behavior of the liquid crystal phase transfer impact. However, the structure of bent-core molecules can damage the stack and thus reduce the melting point and the use of benzene ring substituents can increase polarization, so that the force between molecules becomes larger vaises the liquid crystal phase temperature range. Compared to the traditional bent-core liquid crystals SmCP phase, the structures of these crystals have lower clear points and less SmCP phase stability. The characteristics of liquid crystal phases were studied by polarizing optical microscopy, differential calorimetry, X-ray diffraction and electro-optical methods. |
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