淡江大學機構典藏:Item 987654321/61503
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 62830/95882 (66%)
造访人次 : 4046290      在线人数 : 980
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/987654321/61503


    题名: Alternating Oligo[(2,3-O-isopropylidene-L-threitol)]-co-[(E,E)-1,4-bis(styryl)benzene]s: The Linear Chirality Transmisson Additivity Relationship in Nematic Liquid Crystals
    作者: Kuo, Li-Chung;Huang, Wan-Ting;Yang, Kuei-Hui;Hsu, Hsiu-Fu;Jin, Bih-Yaw;Leung, Man-kit
    贡献者: 淡江大學化學學系
    日期: 2010-09
    上传时间: 2011-10-15 23:11:24 (UTC+8)
    出版者: Washington: American Chemical Society
    摘要: Alternating oligo[2,3-O-isopropylidene-l-threitol]-co-[(E,E)-1,4-bis(styryl)benzene]s (denoted as 2−6 in the article) show helical twisting power (HTP), in 4-pentoxyl-4′-biphenylcarbonitrile (5OCB), linearly proportional to the number of the chiral cores in the oligomers. The HTP per chiral core of −1.75 μm−1 was recorded in the correlation plot with a correlation coefficient of R = 0.99. These results suggested that the C2 chiral l-threitol cores are aligned along the same axis. The comparable linear dichroism (LD) of 0.42 ± 0.02 obtained for (rac)-2−5 at 405 nm, and of 0.52 ± 0.03 for E7, a commercially available room temperature nematic solvent, at 347 nm in a parallel rubbed cell indicated that the long axis of the bis(styryl)benzene segments is more or less parallel to the director of the E7 in the LC matrix. This observation is highly exciting because the HTP per core could still be maintained, no matter whether the cores are evenly spread in a form of monomer in the LC matrix or tightly confined in a polymer. Theoretical treatments about the conformations of the dopant in the nematic matrix are discussed.
    關聯: The Journal of Physical Chemistry Part B 114(8), pp.2607-2616
    DOI: 10.1021/jp909286t
    显示于类别:[化學學系暨研究所] 期刊論文

    文件中的档案:

    档案 描述 大小格式浏览次数
    Alternating Oligo[(2,3-O-isopropylidene-L-threitol)]-co-[(E,E)-1,4-bis(styryl)benzene]s The Linear Chirality Transmisson Additivity Relationship in Nematic Liquid Crystals.pdf3609KbAdobe PDF1检视/开启
    index.html0KbHTML295检视/开启
    index.html0KbHTML177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