Single-Atom Protecting Group for on-Surface Synthesis of Graphdiyne Nanowires

作     者：Huan Shan Ya-hui Mao Ai-di Zhao 

作者机构：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 

出 版 物：《Chinese Journal of Chemical Physics》 (化学物理学报（英文）)

年 卷 期：2019年第32卷第5期

页      面：620-624页

核心收录：

学科分类：07[理学] 0703[理学-化学] 

基　　金：the National Key R&D Program of China(No.2016YFA0200603 No.2017YFA0205004) the Anhui Initiative in Quantum Information Technologies(AHY090300) the National Natural Science Foundation of China(No.21473174) the Fundamental Research Funds for the Central Universities(No.WK2060190084 and No.WK2340000082) Ai-di Zhao acknowledges a fellow-ship from the Youth Innovation Promotion Association of Chinese Academy of Science(2011322) 

主　　题：On-surface synthesis Graphdiyne Ullmann coupling Protecting group Atomic force microscopy 

摘      要：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-]nvia on-surface Ullmann coupling of 1,4-bis（4-bromophenyl）-1,3-butadiyne molecules with chemical vapor deposition ***-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.