文献类型：期刊文献

英文题名：Atomic-Scale Visualization of Stepwise Growth Mechanism of Metal-Alkynyl Networks on Surfaces

作者：Shu, Chen-Hui[1,2];He, Yan[1,2];Zhang, Ruo-Xi[1,2];Chen, Jian-Le[1,2];Wang, An[1,2];Liu, Pei-Nian[1,2]

机构：[1]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Key Lab Adv Mat, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2020

卷号：142

期号：39

起止页码：16579

外文期刊名：JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

收录：;EI(收录号：20204509469020);WOS:【SCI-EXPANDED(收录号:WOS:000577115100012)】；

基金：This work was supported by the National Natural Science Foundation of China (Nos. 21421004, 21925201, 91845110, and 21672059), Shanghai Municipal Science and Technology Major Project (Grant No. 2018SHZDZX03), the Programme of Introducing Talents of Discipline to Universities (B16017), Program of the Shanghai Committee of Sci. & Tech. (Project No. 18520760700), and the Program for Eastern Scholar Distinguished Professor. We thank Dr. Shao-Ze Zhang in Kunming University of Science and Technology for his help in AIM analysis. We thank the Research Center of Analysis and Test of East China University of Science and Technology for help in the characterization.

语种：英文

外文关键词：Honeycomb structures - Organometallics - Atoms - Density functional theory - Reaction intermediates - Scanning tunneling microscopy

摘要：One of the most appealing topics in the study of metal-organic networks is the growth mechanism. However, its study is still considered a significant challenge. Herein, using scanning tunneling microscopy, the growth mechanisms of metal-alkynyl networks on Ag(111) and Au(111) surfaces were investigated at the atomic scale. During the reaction of 1,3,5-tris(chloroethynyl)benzene on Ag(111), honeycomb Ag-alkynyl networks formed at 393 K, and only short chain intermediates were observed. By contrast, the same precursor formed honeycomb Au-alkynyl networks on Au(111) at 503 K. Progression annealing led to a stepwise evolution process, in which the sequential activation of three Cl-alkynyl bonds led to the formation of dimers, zigzag chains, and novel chiral networks as the intermediates. Moreover, density functional theory calculations indicate that chlorine atoms are crucial in assisting the breakage of metal-alkynyl bonds to form Cl-metal-alkynyl, which guarantees the reversibility of the break/formation equilibration as the key to forming regular large-scale organometallic networks.