English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 80990/80990 (100%)
造訪人次 : 41078400      線上人數 : 888
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋


    請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/54107


    題名: 以benzoxazole與benzothiazole為中心架構之無機液晶材料;Metallomesogens Derived from Benzoxazoles and Benzothiazoles.
    作者: 王淳洋;Wang,Chung-Yang
    貢獻者: 化學研究所
    關鍵詞: 液晶材料;中間相;雜環;無機液晶;Liquid crystal;metallomesogen;benzoxazole;benzothiazole
    日期: 2012-07-10
    上傳時間: 2012-09-11 18:36:30 (UTC+8)
    出版者: 國立中央大學
    摘要: 本篇論文系列一合成設計出含有benzoxazole與benzothiazole衍生物的配位基和金屬錯合物(銅、鈀),藉由改變側鏈基的長短,討論其液晶之行為,並透過DSC、POM、XRD 等儀器來觀察其液晶在不同溫度下的性質。研究發現,含有benzoxazole衍生物的配位基當其側鏈基長碳鏈數目為8和10時具有N液晶相,側鏈基長碳鏈數目為12、14以及16時具有SmC液晶相;含有benzothiazole衍生物的配位基其側鏈基長碳鏈數目為8同時具有N液晶相以及SmC液晶相。將benzoxazole與benzothiazole衍生物的配位基和金屬配位,並藉由IR光譜確認配位基確實與金屬配位。POM發現benzoxazole衍生物之(銅、鈀)金屬錯合物皆不具任何液晶相。benzothiazole衍生物之銅金屬錯合物亦不具任何液晶相。benzothiazole衍生物之鈀金屬錯合物側鏈基長碳鏈數目為8, 10, 12, 14, 16時皆具有SmC液晶相。系列二合成設計出含有benzothiazole衍生物,置換苯環4位置上的取代基,探討取代基對液晶行為之影響,研究中發現末端若無任何取代基,則無法產生液晶性質;若末端取代基接上推電子基,則產生nematic液晶相;若末端取代基接上拉電子基,則產生SmA液晶相。並利用取代基常數、dipole moment等性質說明液晶相形成的原因。In the first series synthesis, characterization and mesomorphic behavior of a series of benzoxazole and benzothiazole derivatives 2 and their complexes 1 (M = Pd, Cu) are described. The mesomorphic properties were investigated using polarized optical microscopy (POM), differential scanning calorimetry (DSC), powder X-ray diffraction (XRD). The results indicated that ligands based on benzoxazole with carbon length of n = 8, 10 showed nematic (N) mesophase; with carbon length of n = 12, 14, 16 showed smetic C (SmC) mesophase. All palladium (II) and copper (II) complexes of benzoxazole derivatives were not mesogenic. Ligands based on benzothiazole with carbon length of n = 8 showed nematic (N) and smetic C (SmC) mesophase; with carbon length of n = 10, 12, 14, 16 showed smetic C (SmC) mesophase. Copper (II) complexes of benzothiazole derivatives were not mesogenic. However, palladium (II) comlexes of benzothiazole derivatives with carbon length of n = 8, 10, 12, 14, 16 showed smetic C (SmC) mesophase.In the second series, the effect of substituent group on the formation of the mesophases were investigated by Hammett constant, and dipole moment. A SmA phase was observed for derivatives with a strong electrondrawing substituent, and a N phase was observed for the derivative with an electrondonating substituent.
    顯示於類別:[化學研究所] 博碩士論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    index.html0KbHTML549檢視/開啟


    在NCUIR中所有的資料項目都受到原著作權保護.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 隱私權政策聲明