echemi logo
Product
  • Product
  • Supplier
  • Inquiry
    Home > Chemicals Industry > China Chemical > Journal of the American Chemical Society: Highly selective surface synthesis and electronic characterization of LPs

    Journal of the American Chemical Society: Highly selective surface synthesis and electronic characterization of LPs

    • Last Update: 2021-08-26
    • Source: Internet
    • Author: User
    Search more information of high quality chemicals, good prices and reliable suppliers, visit www.echemi.com

    Recently, the team of Professor Liu Peinian/Associate Professor Li Dengyuan of East China University of Science and Technology, the team of Researcher Qiu Xiaohui/Associate Researcher Liu Mengxi of the National Nano Center and the team of Professor Xingqiang Shi of Hebei University have cooperated to control the surface [2+2] cycloaddition reaction through the steric effect.
    The directional construction of LPs chains was selectively realized, and the electronic properties were characterized in real space
    .

    Conjugated ladder polymers have attracted a lot of attention due to their attractive physical properties such as high carrier mobility, long exciton diffusion length and low energy gap
    .


    Ladder Phenylenes (LPs), composed of alternating six-membered and four-membered rings, are a unique class of conjugated ladder-shaped polymers


    Surface synthesis technology provides a universal way for the precise manufacture of low-dimensional nanostructures (such as benzene macromolecules, one-dimensional polymers, and graphene nanoribbons) at the atomic level
    .


    Combining scanning probe microscopy technology can further study their topological structure and electronic properties


    Recently, the team of Professor Liu Peinian/Associate Professor Li Dengyuan of East China University of Science and Technology, the team of Professor Xiaohui Qiu/Associate Researcher Liu Mengxi of the National Nano Center and the team of Professor Xingqiang Shi of Hebei University have cooperated to control the surface [2+2] cycloaddition reaction through steric effect.
    The directional construction of the LPs chain was selectively realized (Figure 1), and its electronic properties were characterized in real space (Figure 2)
    .

    Figure 1.
    Construction of single molecular chain of LPs based on highly selective surface [2+2] cycloaddition reaction

    This research work developed a highly selective dehalogenation [2+2] cycloaddition reaction on the surface of Au(111) substrates, and prepared linear LPs chains with high quality
    .


    Among them, the steric hindrance effect of the methyl group in the precursor tetrabromopara-xylene (TBDMB) greatly improves the selectivity of the [2+2] cycloaddition reaction and directional control of the product structure


      Figure 2.
    dI/dV spectrum, dI/dV mapping and spin-resolved density of states of LPs single molecular chain

      The research work was completed by the team of Professor Liu Peinian/Associate Professor Li Dengyuan from East China University of Science and Technology, the team of Professor Xiaohui Qiu/Associate Professor Liu Mengxi of the National Nano Center and the team of Professor Xingqiang Shi of Hebei University after four years of unremitting efforts
    .


    The research work was published in the Journal of the American Chemical Society in the form of communication: "Ladder Phenylenes Synthesized on Au(111) Surface via Selective [2+2] Cycloaddition", Deng-Yuan Li, † Xia Qiu, † Shi-Wen Li, † Yin-Ti Ren,† Ya-Cheng Zhu, Chen-Hui Shu, Xiao-Yu Hou, Mengxi Liu,* Xing-Qiang Shi,* Xiaohui Qiu,* Pei-Nian Liu,* J.



    This article is an English version of an article which is originally in the Chinese language on echemi.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to service@echemi.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

    Contact Us

    The source of this page with content of products and services is from Internet, which doesn't represent ECHEMI's opinion. If you have any queries, please write to service@echemi.com. It will be replied within 5 days.

    Moreover, if you find any instances of plagiarism from the page, please send email to service@echemi.com with relevant evidence.