Scholarlink

<p>On-surface synthesis is an emerging field for fabricating low-dimensional nanostructures. While carbenes are versatile reactive intermediates in solution-phase organic synthesis, they have rarely been explored in on-surface synthesis. Here, we demonstrate the versatility of carbenes in synthesizing highly branched zero-dimensional oligomers with distinct structures on a metal surface by combining bond-resolved scanning tunneling microscopy imaging, manipulation, X-ray photoelectron spectroscopy, surface infrared spectroscopy, and ab initio theoretical modeling. We synthesize highly symmetric branched oligomers through the C−C coupling of two carbene molecules to form a core of oligomers, followed by C−H activation of the core with up to four additional carbene molecules to create branches. Branched oligomers of lower symmetry are formed through cyclodehydrogenation of the highly symmetric oligomers. Our on-surface synthetic strategy based on C−H activation of carbene building blocks provides a platform for the design and synthesis of highly branched zero-dimensional oligomers with distinct structures.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

On-surface synthesis platform for highly branched oligomers based on sequential C—C coupling and C—H activation of carbenes

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年1月30日

查看全文
  • Yunjun Cao,
  • Joel Mieres-Perez,
  • Julien Frederic Rowen,
  • Akshay Hemant Raut,
  • Paul Schweer,
  • Anran Bao,
  • Wolfram Sander,
  • Elsa Sanchez-Garcia,
  • Karina Morgenstern

摘要

On-surface synthesis is an emerging field for fabricating low-dimensional nanostructures. While carbenes are versatile reactive intermediates in solution-phase organic synthesis, they have rarely been explored in on-surface synthesis. Here, we demonstrate the versatility of carbenes in synthesizing highly branched zero-dimensional oligomers with distinct structures on a metal surface by combining bond-resolved scanning tunneling microscopy imaging, manipulation, X-ray photoelectron spectroscopy, surface infrared spectroscopy, and ab initio theoretical modeling. We synthesize highly symmetric branched oligomers through the C−C coupling of two carbene molecules to form a core of oligomers, followed by C−H activation of the core with up to four additional carbene molecules to create branches. Branched oligomers of lower symmetry are formed through cyclodehydrogenation of the highly symmetric oligomers. Our on-surface synthetic strategy based on C−H activation of carbene building blocks provides a platform for the design and synthesis of highly branched zero-dimensional oligomers with distinct structures.