Ullmann coupling of 2,7-dibromopyrene on Au(111) assisted by surface adatoms
文献类型：期刊论文
| 作者 | Hu, JB; Hu, JP; Zhang, ZD; Shen, KC; Liang, ZF; Zhang, H; Tian, QW; Wang, P; Jiang, Z; Huang, H |
| 刊名 | APPLIED SURFACE SCIENCE
 |
| 出版日期 | 2020 |
| 卷号 | 513页码:- |
| ISSN号 | 0169-4332 |
| 关键词 | ORGANOMETALLIC INTERMEDIATE POLYMERIZATION SUBSTITUTION RESOLUTION CU(111) INSIGHT CHAINS |
| DOI | 10.1016/j.apsusc.2020.145797 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Ullmann coupling on coinage metals has attracted significant attention in surface chemistry due to its atomic precision of constructing extended covalent nanostructures with predictability, while the elementary reaction mechanism behind has not been comprehensively understood yet. In this study, we demonstrate the active contribution of surface atoms in promoting Ullmann coupling of 2,7-dibromopyrene (Br2Py) on Au(1 1 1) accompanied with the structure transformation from self-assembly to covalently bound one-dimension polymer chains via a combination of scanning tunnelling microscopy (STM), X-ray photoelectron spectroscopy (XPS) and density functional theory calculations (DFT). Even the organometallic intermediate on Au substrate has been occasionally reported before, it is interesting herein to observe organometallic intermediates with the goldcarbon bonding, and demonstrate that surface adatoms specially play an important role in the dehalogenation process of Br2Py on Au(1 1 1) as elucidated by DFT simulations. Step-wise annealing facilitates the decoupling of the coordinated Au atoms from organometallic oligomers and the ultimate formation of extended polymers, which has been consistently interpreted by XPS and DFT calculations. Our study might shed new insights on the atomistic understanding of Ullmann coupling chemistry on Au substrates and proposes an effective approach to comprehensively elucidate the effect of organometallic intermediates towards on-surface Ullmann coupling reaction. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/33236]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Cent South Univ, Sch Phys & Elect, Changsha 410012, Peoples R China 2.Chinese Acad Sci, Shanghai Adv Res Inst, Zhangjiang Lab, Shanghai Synchrotron Radiat Facil, Shanghai 201210, Peoples R China 3.Chinese Acad Sci, Key Lab Interfacial Phys & Technol, Shanghai 201204, Peoples R China 4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China 5.Univ Chinese Acad Sci, Beijing 101000, Peoples R China 6.Norwegian Univ Sci & Technol, Dept Phys, Ctr Quantum Spintron, NO-7491 Trondheim, Norway 7.Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China 8.Shandong Univ Sci & Technol, Dept Appl Phys, Coll Elect & Informat Engn, Qingdao 266590, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, JB,Hu, JP,Zhang, ZD,et al. Ullmann coupling of 2,7-dibromopyrene on Au(111) assisted by surface adatoms[J]. APPLIED SURFACE SCIENCE,2020,513:-. |
| APA | Hu, JB.,Hu, JP.,Zhang, ZD.,Shen, KC.,Liang, ZF.,...&Song, F.(2020).Ullmann coupling of 2,7-dibromopyrene on Au(111) assisted by surface adatoms.APPLIED SURFACE SCIENCE,513,-. |
| MLA | Hu, JB,et al."Ullmann coupling of 2,7-dibromopyrene on Au(111) assisted by surface adatoms".APPLIED SURFACE SCIENCE 513(2020):-. |
入库方式： OAI收割
来源：上海应用物理研究所
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