淡江大學機構典藏:Item 987654321/46947
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 58617/92280 (64%)
造访人次 : 562616      在线人数 : 71
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/46947


    题名: 曲棍形液晶之研究
    其它题名: Study of Hockey Stick Mesogens
    作者: 余良杰
    贡献者: 淡江大學化學學系
    关键词: 曲棍形分子;彎曲單元;3-烷氧基苯甲酸;3-烷氧基二苯乙烯;平層切換;立體阻障;Hockey stick molecule;bending unit;stilbene;3-substituted benzoate;in-planeswitching (IPS);steric hindrance
    日期: 2009
    上传时间: 2010-04-15 15:39:00 (UTC+8)
    摘要: 以3-烷氧基苯甲酸或3-烷氧基二苯乙烯為彎曲單元並以寡聚二乙醇或二辛烷氧基為主 幹之尾鏈合成曲棍形液晶分子。因為親水性或分支效應,預期會有較低溫度的液晶相。 將以「平層切換」組態研究曲棍形分子之液晶相的電場應答性質。測量電場變化大小 時液晶之透光率及應答速率。曲棍形分子之液晶相很有可能可運用於高資訊液晶顯示 器。這些數據對設計新曲棍形分子會有幫助。 在間位長鏈之鄰位接一稍大取代基以造成立體阻障,研究立體阻障對曲棍形分子可能 存在之分子旋轉異構組態的影響,進而探討對曲棍形分子之液晶相的影響及液晶相的 結構。這些數據有助於瞭解同傾層相及反傾層相之層內及層間之分子的排列關係。 Hockey stick molecules consist of 3-alkyloxybenzoic acid or 3-alkyloxy stilbene as bending unit and oligo-ethylene glycol or 2-octyloxy as end chain along the main skeleton are synthesized. Lower mesophase temperatures are expected for the hydrophilicity and branching effect. Mesophases of hockey stick mesogens will be investigated with the in-plane switching (IPS) mode. Transmittance and time constant are measured as function of applied electric field. The results of this IPS mode study would show that hockey stick mesogens are potential candidates for high density LCDs. The results will also provide information for further molecular modification. Effect of steric hindrance due to bulky substituent right next to the meta-chain on the mesophase structures and properties will be studied. The results will shed light for revealing the molecular correlations within the smectic layer and between the smectic layers for the SmC and SmCa phases.
    显示于类别:[化學學系暨研究所] 研究報告

    文件中的档案:

    没有与此文件相关的档案.

    在機構典藏中所有的数据项都受到原著作权保护.

    TAIR相关文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回馈