| DC 欄位 |
值 |
語言 |
| DC.contributor | 化學學系 | zh_TW |
| DC.creator | 鍾德正 | zh_TW |
| DC.creator | De-cheng Chung | en_US |
| dc.date.accessioned | 2010-7-20T07:39:07Z | |
| dc.date.available | 2010-7-20T07:39:07Z | |
| dc.date.issued | 2010 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=972203004 | |
| 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 | 系列一以benzohydrozone及phenolacrylaldehyde進行Schiff base反應後合成出配位基2a、2b分別與Cu(OAc)2及Zn(OAc)2進行反應得到單金屬Cu及Zn錯合物，分別為1a及1b。
配位基2a、2b及Cu錯合物1a及1b在碳數為8, 10, 12, 14, 16皆具有Colh相，Zn錯合物1b，碳數為12, 14, 16具有Colh相，顯示在改變側鏈基碳數，會對液晶相的形成造成顯著的影響。
並透過理論計算、模擬分子結構推測配位基及Cu與Zn錯合物盤狀堆疊的情形，並利用IR、EPR等證實金屬錯合物為單金屬配位。
系列二是以1,3,4-oxadiazole雜環作為設計的主幹，利用改變側鏈基數目合成出配位基4a、4b，其中配位基4b與Cu(OAc)2及Pd(OAc)2配位而得到Cu及Pd錯合物3b。
在配位基4a (n = 16)具有SmA相，顯示較長且較少支數碳鏈有利於桿狀型液晶生成；配位基4b (n = 8, 12, 16)皆為結晶相，與金屬配位後Cu錯合物3b 碳數為8, 12，具有Colh相，Pd錯合物3b 碳數為8, 12, 16皆具有Colh，在結構較對稱且碳鏈數較多之情況下較易形成盤狀型液晶分子。
上述兩系列皆利用POM、DSC及變溫XRD探討其液晶性質。結構及純度上分別利用NMR與元素分析等儀器來鑑定。
| zh_TW |
| dc.description.abstract | In this these two series of new compounds were prepared and their mesomorphic properties investigated. All organic derivatives were characterized by 1H-NMR and 13C-NMR spectroscopes, whereas all metal complexes were characterized by IR spectroscopy and elemental analysis.
Their physical properties were characterized by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and temperature-dependent powder X-ray diffraction (XRD) measurements.
In series I, The Cu(II) complexes 1a, 1b and ligands 2a, 2b are both column-like liquid crystals.The Zn(II) complexes 2b are also column-like liquid crystals with longer alkoxy chains (n = 12, 14,16) The mesophase was identified as hexagonal columnar mesophase (Colh) phase by XRD.
In series II, ligands 4a (n = 16) exhibited smectic A phases. Ligands 4b (n = 8, 12, 16) exhibited crystal phases, but their metal complexes (M = Cu, Pd) form liquid crystal pahes. The Cu(II) complexes 3b (n = 12, 16) and the Pd(II) complexes 3b (n =8, 12, 16) are both column-like liquid crystals. The mesophase was identified as hexagonal columnar mesophase (Colh) phase by XRD.
| en_US |
| DC.subject | 液晶 | zh_TW |
| DC.subject | 材料 | zh_TW |
| DC.subject | liquid crystal | en_US |
| DC.subject | Oxadiazole | en_US |
| DC.subject | Benzohydrize | en_US |
| DC.title | 以Benzohydrize與1,3,4-Oxadiazole為中心架構之無機液晶材料 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.title | The Metallomesogen Dervived from Benzohydrize and 1,3,4-Oxadiazole | en_US |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |