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May 31, 2026Chinese Science Bulletin (Chinese Version)

STM study on the reaction process from halogen-bonded assembly to C5N3 covalent frameworks

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Authors

CLChunxiao LiJLJiaxi LiuSCShuning Cai

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Overview

Randomized trial explores reaction pathways for C5N3 frameworks on metal surfaces, highlighting intermediates' role.

Key Points

  • This study investigates the reaction pathways of halogen-bonded assembly leading to C5N3 covalent frameworks on metal surfaces.
  • Utilized halogenated precursor TBPT on Au(111) surface for self-assembly observations.
  • Characterized TBPT self-assembly with low-temperature scanning tunneling microscopy and non-contact atomic force microscopy.
  • Analyzed the reaction process through thermal activation at varying temperatures.
  • At room temperature, TBPT forms long-range ordered structures through Br···N halogen bonds.
  • Upon 450 K annealing, C-Br bonds break, creating a metal-organic intermediate connected by C-Au-C bonds.
  • At 600 K, the reaction transitions to products bonded via C-C covalent bonds.

Cite This Study

Li et al. (2026) studied this question.

synapsesocial.com/papers/6a1bd0155783ba022b6fbf84https://doi.org/10.1360/csb-2026-0652
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