研究生: |
鄒幸芳 Sing Fang Zou |
---|---|
論文名稱: |
新型含苯丙烯酸胺連接基結構之彎曲型液晶合成及物性與光電性質探討 Synthesis, Characterization and Electro-optical Properties of Novel Bent-Core Mesogens Based on Linking Group Structure of Cinnamoyloxy |
指導教授: |
李俊毅
Jiunn-Yih Lee |
口試委員: |
邱顯堂
Hsien-Tang Chiu 陳建光 Jem-Kun Chen |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 材料科學與工程系 Department of Materials Science and Engineering |
論文出版年: | 2011 |
畢業學年度: | 99 |
語文別: | 中文 |
論文頁數: | 100 |
中文關鍵詞: | 彎曲型液晶 、雙鍵結構 、電壓穿透效果 、傾斜角 、介電常數 |
外文關鍵詞: | bent-core mesogens, cinnamoyloxy, voltage-transmittance effect, tilt angle, dielectric permittivity |
相關次數: | 點閱:221 下載:0 |
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本研究目的為設計並合成一新型彎曲型液晶,核心結構為3,4位置雙苯環(3,4'-biphenyldiol) 及核心末端連接基結構為苯丙烯酸胺結構。在核心側鏈結構加入不同的取代基(氟或氯),進一步探討其對液晶相轉移行為所造成的影響並加以探討。
藉由偏光顯微鏡(Polarizing Optical Microscope;POM)、示差掃描式卡計(Differential Scanning Calorimeter;DSC)和X光射線繞射儀 (X-ray diffraction;XRD)以及不同的光電量測方法等,對液晶相進行探討,特別是出現SmCP相與分子結構間的相互關係。
最後,利用不同的光電量測,如穿透、預傾角、介電、反轉行為等,來探討SmCP相的光電特性。因此,得以更進一步的探討這些化合物的化學結構與光電性質的相互關係。
This research goal is the design new series of bent-core molecules based on a 3,4′-biphenyldiol central core and containing cinnamoyloxy in the side arms has been synthesized. The influence of the central core as well as that of a fluorine and chlorine substituent on the diphenyl rings in the bent-core compound has also been examined.
The mesophases under discussion were investigated by means of polarizing microscopy, differential scanning calorimetry, X-ray diffraction as well as electro-optical experiments. The influence of the molecular structure on the occurrence of the SmCP phase was investigated.
Finally, the electro-optical properties of the SmCP phase, such as voltage-transmittance effect, tilt angle, dielectric permittivity, and switching behavior were also measured. As a consequence, the correlation between their electro-optical properties and chemical structures of these compounds are investigated.
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