| DC 欄位 |
值 |
語言 |
| DC.contributor | 化學學系 | zh_TW |
| DC.creator | 周世祐 | zh_TW |
| DC.creator | Shih-Yu Chou | en_US |
| dc.date.accessioned | 2008-7-18T07:39:07Z | |
| dc.date.available | 2008-7-18T07:39:07Z | |
| dc.date.issued | 2008 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=952203037 | |
| 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)確認其相的種類。
系列化合物Tpz-Cn在n=6時呈現出SmA之液晶相，然後在n=8~16時則展現出SmC之液晶相。化合物Tpz-2Cn在n=6~16時即呈現出Colh的液晶相，然後我們將其配位基與NiCl2進行配位形成錯合物，其錯合物則展現出Colh之液晶。
為了探討pyrazole上的NH對形成液晶是否為ㄧ重要因素，我們將NH取代成O原子合成出具有isoxazole結構之化合物，其相行為在n=12~16時皆為結晶相，因此可之NH對液晶行為有重大的影響。 | zh_TW |
| dc.description.abstract | In this thesis, we report the synthesis, characterization and mesomorphic properties of a series of new mesogenic derivatives based on pyrazole structureies. 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 the serie, a new type of mesogenic compounds derived from heterocyclic pyrazoles were prepared and studied. The compounds of Tpz-Cn, exhibited smectic phases, as expected for their rod-like structures, compounds of Tpz-2Cn, exhibited columnar hexagonal phases, as expected for their discotic-like structures. The metal complexes, Tpz-2Cn-Ni, formed by reacting the pyrazoles with NiCl2 are exhibited columnar hexagonal phases too. | en_US |
| DC.subject | 液晶分子 | zh_TW |
| DC.subject | 桿狀液晶 | zh_TW |
| DC.subject | 盤狀液晶 | zh_TW |
| DC.subject | pyrazole | en_US |
| DC.subject | liquid crystal | en_US |
| DC.subject | mesophase | en_US |
| DC.title | 含pyrazole結構之液晶分子的設計與探討 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.title | Calamitic heterocyclic pyrazoles formed by 1,5-bis(4-alkoxyphenyl)-l,3,5-pentanetriones | en_US |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |