含羽狀側鏈且為缺電子之盤狀液晶的研究並不多。本論文即對含氮雜環之盤狀分子進行羽狀側鏈的合成及對其液晶性質進行探討。
我們設計了以dibenzo[a,c]phenazine為架構之盤狀分子，並含有羽狀側鏈，以期產生液晶相，且藉由此方式來降低液晶相澄清點溫度。發現，若含有兩條羽狀側鏈時，會使得盤與盤之間的擾動太大，而無法產生液晶相。調整為一條羽狀側鏈後，確定可產生柱狀液晶相，且羽狀側鏈碳數越長，液晶相澄清點溫度越低。同時，亦改變周圍碳鏈，探討周圍碳數對液晶相形成之影響。

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目錄
第一章緒論…………………………………………………1
1-1 簡介…………………….………………………………1
1-1.1液晶的起源與特性…..……………………………….1
1-1.2液晶的分類及其應用……………..………………….2
1-2新型液晶分子…………………………………………..6
1-2.1香蕉型液晶……………..…………………………….6
1-2.2自組裝分子………………..………………………….8
1-3影響液晶溫度範圍的因素……………..………………9
1-4 研究動機………………………..…………………….19
第二章實驗部份……………..……………………………21
2-1 藥品與溶劑…………..……………………………….21
2-2 儀器設備……..……………………………………….21
2-3 合成策略………......………………………………….22
2-3.1合成目標…………………………………………….23
2-3.2合成途徑…………………………………………….23
2-4 實驗流程與討論……….……………………………..24
2-4.1製備1,2-Bisalkoxy-4,5-diaminobenzenes……...24
2-4.2製備Tetraalkoxyphenanthrene-9,l0-diones…....30
2-4.3合成2,3,6,7,11,12-Hexakis-alkyloxy-dibenzo[a,c]-phenazine……..33
第三章物性檢測與探討………………………………….35
3-1 液晶相的鑑定………………………………………..35
3-1.1偏光顯微鏡 (Polarizing Microscope)....................35
3-1.2微差掃描熱卡計 (Differential Scanning Calorimetry)....36
3-1.3X光粉末繞射 (Powder X-ray Diffraction)………..36
3-2 物性的討論…………………………………....……..37
3-2.1具有兩條羽狀側鏈…………………………………38
3-2.2改變外圍R’碳數……………………………………41
3-2.3改變R及R”碳數（R=R”）………………………...50
3-2.4改變R”碳數………………………………………...54
3-3 綜合比較......................................................................58
第四章結論………………..……………………………...62
參考文獻………………………………………….………64
附錄………………………………………..……………...65
化合物合成條件與檢測資料…………………………….65

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