文献类型：期刊文献

英文题名：Hierarchical On-Surface Synthesis of Two-Dimensional Networks via S???N and S???H

作者：Shu, Chen-Hui[1,2];Kang, Li-Xia[1];Wang, Shan-shan[1];He, Yan[1];Zhang, Ruo-Xi[1];Su, Xuelei[3];Yu, Ping[3];Li, Xingguang[1];Liu, Pei-Nian[1,4]

机构：[1]East China Univ Sci Technol, Shanghai Key Lab Funct Mat Chem, Sch Chem & Mol Engn, State Key Lab Chem Engn,Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Henan Univ, Ctr Topol Funct Mat, Henan Key Lab Photovolta Mat, Kaifeng 475004, Peoples R China;[3]ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China;[4]China Pharmaceut Univ, Sch Pharm, State Key Lab Nat Med, Nanjing 210009, Peoples R China

年份：2025

卷号：7

期号：1

起止页码：170

外文期刊名：CCS CHEMISTRY

收录：WOS:【ESCI(收录号:WOS:001387941100016)】；

基金：This work was supported by the National Natural Science Foundation of China (grant nos. 22002044, 21925201, 22161160319, 22201073, and 21978049) , Shanghai Municipal Science and Technology Major Project, China (grant no. 2018SHZDZX03) , China Postdoctoral Science Foundation (grant nos. 2022M711035 and 2021M702188) , the Programme of Introducing Talents of Discipline to Universities, China (grant no. B16017) and the Fundamental Research Funds for the Central Universities of China. We thank the Research Center of Analysis and Testing of East China University of Science and Technology for help with the characterization of our fabrications.

语种：英文

外文关键词：two-dimensional networks; surfaces; chalcogen atoms; multipoint noncovalent bonds; scanning tunneling microscopy

摘要：Although electrostatic bonding between chalcogen (Ch) atoms (O, S, Se, and Te) and nitrogen (N) has emerged as a powerful driving force in the fabrication of supramolecular structures; this noncovalent bond has not yet been used to link polymers to form networks. In this study, we took advantage of additive enthalpy in forming multipoint noncovalent bonds to construct a two-dimensional (2D) network via the hierarchical on-surface synthesis of linear polymer chains, followed by multipoint S center dot center dot center dot N and S center dot center dot center dot H bonding. When 4,7-dibromobenzo[c][1,2,5]thiadia- zole was used, only short oligomers with embedded bromine atoms and cross-linked byproducts were formed on Ag(111) or Au(111) surfaces after multiple annealing procedures, and no 2D network was observed. By changing the precursor to a similar iodine- substituted molecule, long linear polymers were generated and assembled with iodine atoms on Au(111) after annealing at 523 K. After annealing at 603 K, iodine atoms were desorbed and polymer chains were assembled via multipoint noncovalent bonding. The 2D network remained intact after annealing at 653 K, demonstrating its high thermostability. The multipoint noncovalent bonds were investigated by the combination of scanning tunneling microscopy, noncontact atomic force microscopy, and density functional theory calculations, which revealed that S center dot center dot center dot N and S center dot center dot center dot H bonding were the driving forces to construct thermostable and orderly 2D networks. [GRAPHICS] .