English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 57505/91036 (63%)
造访人次 : 13423665      在线人数 : 277
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/987654321/118896

    题名: Both increasing the Iso-to-Col transition and lowering the solidifying temperatures of a triazine-based dendrimer by introducing CN polar groups in the dendritic core
    作者: Lee, Cheng-Hua;Huang, Chun-Chi;Li, Chia-Ying;Lai, Long-Li;Lee, Jey-Jau;Hsu, Hsiu-Fu
    日期: 2019-10-20
    上传时间: 2020-07-13 12:10:23 (UTC+8)
    出版者: Royal Society of Chemistry
    摘要: Two new triazine-based dendrimers 1a and 1b, containing –NY(CH2)3NY– linkers between two G3 dendrons (1a: Y = Bz, 1b: Y = 4-cyanoBz; Bz = benzyl), were successfully prepared in ∼32 and ∼34% yields, respectively. Compared with dendrimer 1c that contains –NH(CH2)3NH– linkers between two G3 dendrons, dendrimer 1a exhibits a similar mesogenic range to 1c, but 1b possesses a broader mesophase-temperature range than 1c. Surprisingly, dendrimer 1b not only increases the isotropic-phase-to-columnar-mesophase (Iso-to-Col) transition temperature but also lowers the solidifying temperature on cooling. It is believed that the CN groups in the dendritic linker of 1b increase both the molecular interaction between dendrimers, leading to its increasing Iso-to-Col transition temperature, and dendritic distances within columns, leading to its decreasing solidifying temperature.
    關聯: Journal of Materials Chemistry C 7(45), p.14232-14238
    DOI: 10.1039/C9TC04004H
    显示于类别:[化學學系暨研究所] 期刊論文


    档案 描述 大小格式浏览次数



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