淡江大學機構典藏:Item 987654321/32815
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 64178/96951 (66%)
造访人次 : 9305161      在线人数 : 234
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: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/32815


    题名: 芴衍生物及其聚合物之理論計算研究
    其它题名: Theoretical study of fluorene's derivatives and their polymers
    作者: 顏煥昇;Yan, Huan-sheng
    贡献者: 淡江大學化學學系碩士班
    王伯昌;Wang, Bo-cheng
    关键词: ;密度泛函數;能隙;HOMO;LUMO;energy gap;polyfluorene;DFT;PBC
    日期: 2007
    上传时间: 2010-01-11 02:47:55 (UTC+8)
    摘要: 芴聚合物為一擁有高共軛系統的結構,可應用於有機半導體元件、OLED、PLED等光電材料上。改變主鏈使其成為共聚物或利用不同的推、拉電子基取代其側鏈後,其能隙也會有所改變,進而發展出不同能隙的光電材料。 使用幾種量子力學計算方法如PBC-DFT、DFT、TDDFT和ZINDO四種,探討芴高分子聚合物的電子性質。經計算得到的值與實驗值相比較後,發現計算值與實驗值有相同的趨勢。其中以使用密度泛函數(PBC-DFT)之B3LYP/6-31G*層級來計算這些芴高分子聚合物的電子結構、以及相關之電子軌域能量( HOMO,LUMO )與ΔEgap( HOMO-LUMO ),計算出來的結果最好且最省時,因此將來對於類似聚合物的開發、設計上可以當做參考的工具。
    Polyfluorene is a high π-electron conjugated polymer. It can be applied for the organic semi-conductor material, OLED, PLED, and OFET. Electron-drawing groups and electron-withdrawing groups can affect the Egap of polythiophene.In this study, the geometrical structures and electronic properties of polyfluorene is studied using two methods. One, we use DFT method with periodic boundary condition (PBC) to calculate HOMO energies, LUMO energies and the HOMO-LUMO gaps of the polymers. The other, HOMO energies, LUMO energies and the HOMO-LUMO gaps of the oligomers of the polymers are studied by the density functional theory with B3LYP functional. The lowest excitation energies (Egs) and the maximal absorption wavelength λabs of the oligomers of these polymers are studied employing the time-dependent density function theory (TDDFT) and semiempirical method Zindo. According to my calculating result, the Egap has the same tendency with the experimental value. This study provide a simple and satisfying method, which may be applied to design new materials.
    显示于类别:[化學學系暨研究所] 學位論文

    文件中的档案:

    档案 大小格式浏览次数
    0KbUnknown225检视/开启

    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