| DC 欄位 |
值 |
語言 |
| DC.contributor | 化學學系 | zh_TW |
| DC.creator | 蔡韶玲 | zh_TW |
| DC.creator | Shao-Ling Tsai | en_US |
| dc.date.accessioned | 2007-7-24T07:39:07Z | |
| dc.date.available | 2007-7-24T07:39:07Z | |
| dc.date.issued | 2007 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=92223050 | |
| dc.contributor.department | 化學學系 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.abstract | 本篇論文主要包含具有pyrazole結構以及isoxazole結構之有機液晶。所有化合物經由1H-NMR、13C-NMR、Mass與元素分析以鑑定其結構及純度，液晶相性質則是利用偏光顯微鏡(POM)來觀測相種類及熱微差掃描分析儀(DSC)測量相變化時之溫度與熱焓值，最後以變溫粉末X光繞射儀(XRD)確認相的種類。
系列一：合成出具有pyrazole結構的液晶分子，探討不同碳數(n = 8、10、12、14、16) 對液晶相的影響以及在pyrazole上N-H位置取代三種不同官能基，分別為甲基、乙醇基、 啶基，利用取代基賦予不同的分子間作用力，而在化學及物理性質上做探討;合成出具有isoxazole結構之有機液晶，探討不同碳數(n =8、10、12、14、16) 對液晶相的影響; 系列二：合成出具有pyrazole環不對稱結構之有機液晶Hpz-C16-OH，具有SmA相。 | zh_TW |
| dc.description.abstract | In this serie, we report the synthesis, characterization and mesomorphic properties of two series of new mesogenic derivatives based on pyrazole and isoxazole structures. All compounds were characterized by 1H, 13C-NMR spectroscopy and elemental analysis. The phase behaviors of these mesogenic compounds were characterized and studied by differential scanning calorimeter (DSC) and polarization optical microscope.
In serie one, a new type of mesogenic compounds derived from heterocyclic pyrazole and isoxazole (Iz-Cn) were prepared and studied. All compounds exhibited smectic phases depending on the carbon length attached. Replacing hydrogen atom of pyrazole by methyl group (Mpz-Cn), ethanol group (Epz-Cn) and pyridinal group (Ppz-Cn) were carried out and the mesomorphic behavior studied.
In serie two, we designed and characterized a series of asymmetrical of organic molecules Hpz-Cn-OH derived from pyrazole with one side chains. These compounds exhibited smectic phases. | en_US |
| DC.subject | 有機桿狀液晶 | zh_TW |
| DC.subject | isoxazole | en_US |
| DC.subject | pyrazole | en_US |
| DC.title | 含pyrazole及isoxazole之有機桿狀液晶 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.title | β-Diketone, Pyrazole and Isoxazole Derivatives with Polar Groups: Liquid Crystalline and Thermodynamic Properties | en_US |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |