English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 58237/91808 (63%)
造访人次 : 13786227      在线人数 : 46
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/987654321/44215

    题名: New Thiophene-Linked Conjugated Poly(azomethine)s: Theoretical Electronic Structure, Synthesis, and Properties
    作者: Tsai, Fu-chuan;Chang, Chao-ching;Liu, Cheng-liang;Chen, Wen-chang;Jenekhe, Samson A.
    贡献者: 淡江大學化學工程與材料工程學系
    日期: 2005-03-08
    上传时间: 2010-03-09 10:03:32 (UTC+8)
    出版者: Washington: American Chemical Society (ACS)
    摘要: We report a joint theoretical and experimental study of several new thiophene-based poly(azomethine)s. Hybrid density functional theory (DFT) method was used to calculate the optimized geometry and electronic structure of poly(azomethine)s. Theoretical band gaps of the new thiophene-based poly(azomethine)s were in the range 2.33−2.67 eV, which are smaller than that of the phenylene-based polymer. The variation of the backbone ring (fluorene, carbazole, or naphthalene) or donor/acceptor side group on the phenylene ring significantly affected the dihedral angles and resulted in the variation of electronic properties (ionization potential, electron affinity, and band gap) of the poly(azomethine)s. Five soluble new conjugated poly(azomethine)s derived from the polymerization of 2,5-diformyl-3-hexylthiophene (DFHT) with various diamines were prepared and characterized. The optical and electrochemical band gaps of the polymer films were in the ranges 2.21−2.28 and 2.13−2.24 eV, respectively. The trend of the effect of the backbone ring or side chain on the experimental electronic properties is in good agreement with the theoretical results. Our study demonstrates how the electronic properties of conjugated poly(azomethine)s can be tuned by the backbone ring or side group, which could be important for electronic or optoelectronic applications of the materials.
    關聯: Macromolecules 38, pp.1958-1966
    DOI: 10.1021/ma048112o
    显示于类别:[化學工程與材料工程學系暨研究所] 期刊論文


    档案 描述 大小格式浏览次数
    ma048112o.pdf178KbAdobe PDF0检视/开启



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