引用本文:
【打印本页】   【HTML】   【下载PDF全文】   View/Add Comment  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 118次   下载 0 本文二维码信息
码上扫一扫!
分享到: 微信 更多
Single-Atom Protecting Group for on-Surface Synthesis of Graphdiyne Nanowires
Huan Shan,Ya-hui Mao,Ai-di Zhao*
Author NameAffiliationE-mail
Huan Shan Hefei National Laboratory for Physical Sciences at the Microscale, Synergetic Innovation Center of Quantum Information & Quantum Physics, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Ya-hui Mao Hefei National Laboratory for Physical Sciences at the Microscale, Synergetic Innovation Center of Quantum Information & Quantum Physics, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Ai-di Zhao* Hefei National Laboratory for Physical Sciences at the Microscale, Synergetic Innovation Center of Quantum Information & Quantum Physics, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China adzhao@ustc.edu.cn 
Abstract:
On-surface synthesis of semiconducting graphdiyne nanowires usually suffer severe side reactions owing to the high reactivity of the butadiynylene units at noble metal surfaces, limiting the production of isolated nanowires. In this work, we report the high-yield synthesis of branchless graphdiyne nanowires [-C≡C-Ph2-C≡C-]n via on-surface Ullmann coupling of 1,4-bis(4-bromophenyl)-1,3-butadiyne molecules with chemical vapor deposition method. Non-contact atomic force microscopy with single-bond resolution reveals that single gold adatoms act as effective protecting groups for butadiynylene units by forming Au-π ligand bonds, preventing unwanted branched coupling reactions and enabling the synthesis of ultralong isolated graphdiyne nanowires. This study will stimulate further investigation on the role of various surface adatoms in protecting on-surface reactions.
Key words:  On-surface synthesis, Graphdiyne, Ullmann coupling, Protecting group, Atomic force microscopy
FundProject:
单原子作为保护基团实现石墨双炔纳米线的表面合成
单 欢,毛亚会,赵爱迪*
摘要:
由于在贵金属表面的双炔单元具有高反应活性,表面合成半导体性质的石墨双炔纳米线通常会受到副反应的严重影响,难以分立的纳米线的高质量制备. 本文利用化学气相沉积1,4-bis(4-bromophenyl)-1,3-butadiyne分子到表面发生Ullmann偶联反应,可实现无支链的石墨双炔纳米线[-C≡C-Ph2-C≡C-]n (PYP)的高产率合成. 进一步的单化学键分辨的非接触原子力显微镜表征揭示了单个金增原子与双炔键之间形成了π-ligand键,有效地充当了反应过程中双炔单元的保护基团,避免了偶联过程中的副反应,从而实现了分立的超长石墨双炔纳米线的合成. 这项研究将启发对在表面反应中各类表面增原子所起保护作用的更深入研究.
关键词:  表面合成,石墨双炔,Ullmann偶联,保护基团,原子力显微学
DOI:10.1063/1674-0068/cjcp1905082
分类号: