1
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Yi Z, Zhang Z, Guo Y, Gao Y, Hou R, Zhang C, Kim Y, Xu W. Revealing the Influence of Molecular Chemisorption Direction on the Reaction Selectivity of Dehalogenative Coupling on Au(111): Polymerization versus Cyclization. ACS NANO 2024; 18:14640-14649. [PMID: 38761149 DOI: 10.1021/acsnano.4c02766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2024]
Abstract
The control of reaction selectivity is of great interest in chemistry and depends crucially on the revelation of key influencing factors. Based on well-defined molecule-substrate model systems, various influencing factors have been elucidated, focusing primarily on the molecular precursors and the underlying substrates themselves, while interfacial properties have recently been shown to be essential as well. However, the influence of molecular chemisorption direction on reaction selectivity, as a subtle interplay between molecules and underlying substrates, remains elusive. In this work, by a combination of scanning tunneling microscopy imaging and density functional theory calculations, we report the influence of molecular chemisorption direction on the reaction selectivity of two types of dehalogenative coupling on Au(111), i.e., polymerization and cyclization, at the atomic level. The diffusion step of a reactive dehalogenated intermediate in two different chemisorption directions was theoretically revealed to be the key to determining the corresponding reaction selectivity. Our results highlight the important role of molecular chemisorption directions in regulating the on-surface dehalogenative coupling reaction pathways and products, which provides fundamental insights into the control of reaction selectivity by exploiting some subtle interfacial parameters in on-surface reactions for the fabrication of target low-dimensional carbon nanostructures.
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Affiliation(s)
- Zewei Yi
- Interdisciplinary Materials Research Center, School of Materials Science and Engineering, Tongji University, Shanghai 201804, People's Republic of China
| | - Zhaoyu Zhang
- Interdisciplinary Materials Research Center, School of Materials Science and Engineering, Tongji University, Shanghai 201804, People's Republic of China
| | - Yuan Guo
- Interdisciplinary Materials Research Center, School of Materials Science and Engineering, Tongji University, Shanghai 201804, People's Republic of China
| | - Yuhong Gao
- Interdisciplinary Materials Research Center, School of Materials Science and Engineering, Tongji University, Shanghai 201804, People's Republic of China
| | - Rujia Hou
- Interdisciplinary Materials Research Center, School of Materials Science and Engineering, Tongji University, Shanghai 201804, People's Republic of China
| | - Chi Zhang
- Interdisciplinary Materials Research Center, School of Materials Science and Engineering, Tongji University, Shanghai 201804, People's Republic of China
| | - Yousoo Kim
- Surface and Interface Science Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
| | - Wei Xu
- Interdisciplinary Materials Research Center, School of Materials Science and Engineering, Tongji University, Shanghai 201804, People's Republic of China
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2
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Yano M, Yasuda S, Fukutani K, Asaoka H. Long and oriented graphene nanoribbon synthesis from well-ordered 10,10'-dibromo-9,9'-bianthracene monolayer on crystalline Au surfaces. RSC Adv 2023; 13:14089-14096. [PMID: 37179998 PMCID: PMC10167794 DOI: 10.1039/d2ra07570a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 05/01/2023] [Indexed: 05/15/2023] Open
Abstract
Bottom-up synthesis on metal surfaces has attracted attention for the fabrication of graphene nanoribbons (GNRs) with atomically-precise chemical structures to realize novel electronic devices. However, control of length and orientation on surfaces during GNR synthesis is difficult, thus, achieving longer and aligned GNR growth is a significant challenge. Herein, we report GNR synthesis from a well-ordered dense monolayer on Au crystalline surfaces for long and oriented GNR growth. Scanning tunneling microscopy showed that 10,10'-dibromo-9,9'-bianthracene (DBBA) precursors deposited on Au(111) at room temperature self-assembled into a well-ordered dense monolayer, and the straight molecular wire structure was formed where Br atoms in each precursor were adjacent along the wire axis. The DBBAs in the monolayer were found to be hardly desorbed from the surface under subsequent heating and efficiently polymerize along with the molecular arrangement, resulting in more long and oriented GNR growth compared to the conventional growth method. The result is attributed to be suppression of random diffusion and desorption of the DBBAs on the Au surface during polymerization due to the densely-packed DBBA structure. Additionally, an investigation of the effect of the Au crystalline plane on the GNR growth revealed further anisotropic GNR growth on Au(100) compared to Au(111) due to the stronger interactions of DBBA with Au(100). These findings provide fundamental knowledge for controlling GNR growth from a well-ordered precursor monolayer to achieve more long and oriented GNRs.
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Affiliation(s)
- Masahiro Yano
- Research Group for Surface and Interface Science, Advanced Science Research Center, Japan Atomic Energy Agency 2-4 Shirakata Tokai Ibaraki 319-1195 Japan
| | - Satoshi Yasuda
- Research Group for Surface and Interface Science, Advanced Science Research Center, Japan Atomic Energy Agency 2-4 Shirakata Tokai Ibaraki 319-1195 Japan
| | - Katsuyuki Fukutani
- Research Group for Surface and Interface Science, Advanced Science Research Center, Japan Atomic Energy Agency 2-4 Shirakata Tokai Ibaraki 319-1195 Japan
- Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8505 Japan
| | - Hidehito Asaoka
- Research Group for Surface and Interface Science, Advanced Science Research Center, Japan Atomic Energy Agency 2-4 Shirakata Tokai Ibaraki 319-1195 Japan
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3
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Huang C, Xie L, Wang H, Liang Z, Jiang Z, Song F. Manipulation of C-C coupling pathways using different annealing procedures. Chem Commun (Camb) 2022; 58:13507-13510. [PMID: 36385194 DOI: 10.1039/d2cc04745d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
From scanning tunnelling microscopy and density functional theory calculations, we demonstrate that different annealing mechanisms could modulate distinct reaction pathways, where in a stepwise annealing procedure the detached Br atoms may reduce the activation barrier of CH activation resulting in hierarchical cross dehydrogenative coupling, while in a one-step annealing procedure only Ullmann coupling products are observed.
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Affiliation(s)
- Chaoqin Huang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201000, China. .,University of Chinese Academy of Sciences, Beijing 101000, China
| | - Lei Xie
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China.
| | - Hongbing Wang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201000, China. .,University of Chinese Academy of Sciences, Beijing 101000, China
| | - Zhaofeng Liang
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China.
| | - Zheng Jiang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201000, China. .,University of Chinese Academy of Sciences, Beijing 101000, China.,Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China.
| | - Fei Song
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201000, China. .,University of Chinese Academy of Sciences, Beijing 101000, China.,Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China.
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4
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Zhang C, Kazuma E, Kim Y. Steering the Reaction Pathways of Terminal Alkynes by Introducing Oxygen Species: From C-C Coupling to C-H Activation. J Am Chem Soc 2022; 144:10282-10290. [PMID: 35587810 DOI: 10.1021/jacs.2c01026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Selective regulation of chemical reactions is crucial in chemistry. Oxygen, as a key reagent in ubiquitous oxidative chemistry, exhibits great potential in regulating molecular assemblies, and more importantly, chemical reactions in molecular systems supported by metal surfaces. However, the unique catalytic performance and reaction mechanisms of oxygen species remain elusive, which are essential for understanding reaction selection and regulation. In this study, by a combination of scanning tunneling microscopy (STM) imaging/manipulations and density functional theory (DFT) calculations, we showed that the on-surface reaction pathways of terminal alkynes could be steered from C-C coupling to C-H activation with high selectivity by introducing O2 into the molecular system. The catalytic performance and reaction mechanisms of oxygen species were explored in the C-H activation processes, and both molecular O2 and atomic O could efficiently steer the reaction pathways. These results would provide a fundamental understanding of interfacial catalytic reaction processes.
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Affiliation(s)
- Chi Zhang
- Surface and Interface Science Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Interdisciplinary Materials Research Center, College of Materials Science and Engineering, Tongji University, Caoan Road 4800, Shanghai 201804, People's Republic of China
| | - Emiko Kazuma
- Surface and Interface Science Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Yousoo Kim
- Surface and Interface Science Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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5
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Han Y, Wang J, Song L, Zheng Y, Li Y, Lin H, Li Q, Chi L. A Fundamental Role of the Molecular Length in Forming Metal-Organic Hybrids of Phenol Derivatives on Silver Surfaces. J Phys Chem Lett 2021; 12:1869-1875. [PMID: 33586446 DOI: 10.1021/acs.jpclett.1c00005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In on-surface chemistry, the efficient preparation of metal-organic hybrids is regarded as a primary path to mediate controlled synthesis of well-ordered low-dimensional organic nanostructures. The fundamental mechanisms in forming these hybrid structures, however, are so far insufficiently explored. Here, with scanning tunneling microscopy, we studied the bonding behavior of the adsorbed phenol derivatives with different molecular lengths. We reveal that shorter molecules favor bonding with extracted metal adatoms and result in metal-organic hybrids, whereas longer molecules prefer to bond with lattice metal atoms. The conclusions are further confirmed by density functional theory calculations.
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Affiliation(s)
- Yangyang Han
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, P. R. China
| | - Junbo Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, P. R. China
| | - Luying Song
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, P. R. China
| | - Yuanjing Zheng
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, P. R. China
| | - Youyong Li
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, P. R. China
| | - Haiping Lin
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, P. R. China
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China
| | - Qing Li
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, P. R. China
- School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China
| | - Lifeng Chi
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, P. R. China
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6
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Schultz JF, Yang B, Jiang N. On-surface formation of metal–organic coordination networks with C⋯Ag⋯C and C=O⋯Ag interactions assisted by precursor self-assembly. J Chem Phys 2021; 154:044703. [DOI: 10.1063/5.0038559] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Affiliation(s)
- Jeremy F. Schultz
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, USA
| | - Bing Yang
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Liaoning 116023, China
| | - Nan Jiang
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, USA
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7
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Leng X, Li W, Liu X, Wang L. Direct observation of meta-selective C-H activation on Pd(1 1 1) by scanning tunneling microscopy. Chem Phys 2020. [DOI: 10.1016/j.chemphys.2020.110981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Yuan B, Li C, Zhao Y, Gröning O, Zhou X, Zhang P, Guan D, Li Y, Zheng H, Liu C, Mai Y, Liu P, Ji W, Jia J, Wang S. Resolving Quinoid Structure in Poly(para-phenylene) Chains. J Am Chem Soc 2020; 142:10034-10041. [DOI: 10.1021/jacs.0c01930] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Bingkai Yuan
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Can Li
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yan Zhao
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Oliver Gröning
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf 8600, Switzerland
| | - Xieyu Zhou
- Department of Physics, Renmin University, Beijing 100872, China
| | - Pengfei Zhang
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - DanDan Guan
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yaoyi Li
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hao Zheng
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Canhua Liu
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yiyong Mai
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Peinian Liu
- Shanghai Key Laboratory of Functional Materials Chemistry, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
| | - Wei Ji
- Department of Physics, Renmin University, Beijing 100872, China
| | - Jinfeng Jia
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Shiyong Wang
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China
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9
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Feng L, Wang T, Jia H, Huang J, Han D, Zhang W, Ding H, Xu Q, Du P, Zhu J. On-surface synthesis of planar acenes via regioselective aryl-aryl coupling. Chem Commun (Camb) 2020; 56:4890-4893. [PMID: 32236253 DOI: 10.1039/d0cc01043j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of 2,2'-dibromo-biphenyl on a Ag(111) surface leads to the formation of planar acenes with a high-regioselectivity rather than nonplanar saddle-shaped tetraphenylene as the typical product in solution chemistry. The regioselective aryl-aryl coupling reaction is attributed to the hydrogen repulsion between the reactants on the confined two-dimensional surface.
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Affiliation(s)
- Lin Feng
- National Synchrotron Radiation Laboratory, Department of Chemical Physics and Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei, 230029, China.
| | - Tao Wang
- National Synchrotron Radiation Laboratory, Department of Chemical Physics and Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei, 230029, China.
| | - Hongxing Jia
- Hefei National Laboratory of Physical Science at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, P. R. China.
| | - Jianmin Huang
- National Synchrotron Radiation Laboratory, Department of Chemical Physics and Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei, 230029, China.
| | - Dong Han
- National Synchrotron Radiation Laboratory, Department of Chemical Physics and Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei, 230029, China.
| | - Wenzhao Zhang
- National Synchrotron Radiation Laboratory, Department of Chemical Physics and Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei, 230029, China.
| | - Honghe Ding
- National Synchrotron Radiation Laboratory, Department of Chemical Physics and Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei, 230029, China.
| | - Qian Xu
- National Synchrotron Radiation Laboratory, Department of Chemical Physics and Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei, 230029, China.
| | - Pingwu Du
- Hefei National Laboratory of Physical Science at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, P. R. China.
| | - Junfa Zhu
- National Synchrotron Radiation Laboratory, Department of Chemical Physics and Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei, 230029, China.
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10
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Lu H, Wenlong E, Ma Z, Yang X. Organometallic polymers synthesized from prochiral molecules by a surface-assisted synthesis on Ag(111). Phys Chem Chem Phys 2020; 22:8141-8145. [PMID: 32248207 DOI: 10.1039/c9cp06893g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Organometallic polymers can be successfully synthesized on a Ag(111) surface via a surface-assisted synthesis by choosing prochiral 4,4'-dibromo-2,2'-bis(2-phenylethynyl)-1,1'-biphenyl (DBPB) molecules as the designed precursor. High-resolution scanning tunneling microscopy investigation reveals that prochiral molecules show chirality on a surface and can evolve into organometallic chains on the Ag(111) surface based on Ullmann coupling. Due to the special structural features of DBPB molecules, chiral selectivity will be lost in the organometallic polymers. This result may provide an important basis for selecting suitable precursors to fabricate chiral covalent nanostructures on a surface.
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Affiliation(s)
- Hui Lu
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, 457, Zhongshan Road, Dalian 116023, Liaoning, P. R. China. and University of Chinese Academy of Sciences, 19 A Yuquan Road, Shijingshan District, Beijing 100049, P. R. China
| | - E Wenlong
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, 457, Zhongshan Road, Dalian 116023, Liaoning, P. R. China. and University of Chinese Academy of Sciences, 19 A Yuquan Road, Shijingshan District, Beijing 100049, P. R. China
| | - Zhibo Ma
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, 457, Zhongshan Road, Dalian 116023, Liaoning, P. R. China.
| | - Xueming Yang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, 457, Zhongshan Road, Dalian 116023, Liaoning, P. R. China. and Department of Chemistry, Southern University of Science and Technology, 1088 Xueyuan Road, Guangdong, Shenzhen 518055, P. R. China
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11
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Fu C, Mikšátko J, Assies L, Vrkoslav V, Orlandi S, Kalbáč M, Kovaříček P, Zeng X, Zhou B, Muccioli L, Perepichka DF, Orgiu E. Surface-Confined Macrocyclization via Dynamic Covalent Chemistry. ACS NANO 2020; 14:2956-2965. [PMID: 32068388 DOI: 10.1021/acsnano.9b07671] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Surface-confined synthesis is a promising approach to build complex molecular nanostructures including macrocycles. However, despite the recent advances in on-surface macrocyclization under ultrahigh vacuum, selective synthesis of monodisperse and multicomponent macrocycles remains a challenge. Here, we report on an on-surface formation of [6 + 6] Schiff-base macrocycles via dynamic covalent chemistry. The macrocycles form two-dimensional crystalline domains on the micrometer scale, enabled by dynamic conversion of open-chain oligomers into well-defined ∼3.0 nm hexagonal macrocycles. We further show that by tailoring the length of the alkyl substituents, it is possible to control which of three possible products-oligomers, macrocycles, or polymers-will form at the surface. In situ scanning tunneling microscopy imaging combined with density functional theory calculations and molecular dynamics simulations unravel the synergistic effect of surface confinement and solvent in leading to preferential on-surface macrocyclization.
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Affiliation(s)
- Chaoying Fu
- Center Lab of Longhua Branch and Department of Infectious disease, Shenzhen People's Hospital, second Clinical Medical College of Jinan University, Shenzhen 518120, Guangdong Province, China
- INRS, Énergie Matériaux Télécommunications Centre, 1650 boulevard Lionel-Boulet, Varennes, Québec, Canada J3X 1S2
- Department of Chemistry, McGill University, 801 Sherbrooke Street W., Montreal, Quebec, Canada H3A 0B8
| | - Jiří Mikšátko
- J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Praha, Czech Republic
| | - Lea Assies
- J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Praha, Czech Republic
| | - Vladimír Vrkoslav
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo námĕstí 542/2, 166 10 Praha, Czech Republic
| | - Silvia Orlandi
- Dipartimento di Chimica Industriale " Toso Montanari ", Università di Bologna, 40136 Bologna, Italy
| | - Martin Kalbáč
- J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Praha, Czech Republic
| | - Petr Kovaříček
- J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Praha, Czech Republic
| | - Xiaobin Zeng
- Center Lab of Longhua Branch and Department of Infectious disease, Shenzhen People's Hospital, second Clinical Medical College of Jinan University, Shenzhen 518120, Guangdong Province, China
| | - Boping Zhou
- Center Lab of Longhua Branch and Department of Infectious disease, Shenzhen People's Hospital, second Clinical Medical College of Jinan University, Shenzhen 518120, Guangdong Province, China
| | - Luca Muccioli
- Dipartimento di Chimica Industriale " Toso Montanari ", Università di Bologna, 40136 Bologna, Italy
- Institut des Sciences Moléculaires, UMR 5255, University of Bordeaux, 33405 Talence, France
| | - Dmitrii F Perepichka
- Department of Chemistry, McGill University, 801 Sherbrooke Street W., Montreal, Quebec, Canada H3A 0B8
| | - Emanuele Orgiu
- INRS, Énergie Matériaux Télécommunications Centre, 1650 boulevard Lionel-Boulet, Varennes, Québec, Canada J3X 1S2
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12
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Yu X, Cai L, Bao M, Sun Q, Ma H, Yuan C, Xu W. On-surface synthesis of graphyne nanowires through stepwise reactions. Chem Commun (Camb) 2020; 56:1685-1688. [DOI: 10.1039/c9cc07421j] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We have achieved on-surface synthesis of graphyne nanowires through stepwise reactions involving two different types of dehalogenative homocoupling reactions (i.e., C(sp3)–Br and C(sp2)–Br).
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Affiliation(s)
- Xin Yu
- Interdisciplinary Materials Research Center
- College of Materials Science and Engineering
- Tongji University
- Shanghai 201804
- P. R. China
| | - Liangliang Cai
- Interdisciplinary Materials Research Center
- College of Materials Science and Engineering
- Tongji University
- Shanghai 201804
- P. R. China
| | - Meiling Bao
- Interdisciplinary Materials Research Center
- College of Materials Science and Engineering
- Tongji University
- Shanghai 201804
- P. R. China
| | - Qiang Sun
- Interdisciplinary Materials Research Center
- College of Materials Science and Engineering
- Tongji University
- Shanghai 201804
- P. R. China
| | - Honghong Ma
- Interdisciplinary Materials Research Center
- College of Materials Science and Engineering
- Tongji University
- Shanghai 201804
- P. R. China
| | - Chunxue Yuan
- Interdisciplinary Materials Research Center
- College of Materials Science and Engineering
- Tongji University
- Shanghai 201804
- P. R. China
| | - Wei Xu
- Interdisciplinary Materials Research Center
- College of Materials Science and Engineering
- Tongji University
- Shanghai 201804
- P. R. China
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13
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Ammon M, Haller M, Sorayya S, Maier S. On-Surface Synthesis of Porous Carbon Nanoribbons on Silver: Reaction Kinetics and the Influence of the Surface Structure. Chemphyschem 2019; 20:2333-2339. [PMID: 31400291 PMCID: PMC6771863 DOI: 10.1002/cphc.201900347] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 08/02/2019] [Indexed: 11/12/2022]
Abstract
We report on the influence of the surface structure and the reaction kinetics in the bottom-up fabrication of porous nanoribbons on silver surfaces using low-temperature scanning tunneling microscopy. The porous carbon nanoribbons are fabricated by the polymerization of 1,3,5-tris(3-bromophenyl)benzene directly on the Ag surface using an Ullmann-type reaction in combination with dehydrogenative coupling reactions. We demonstrate the successful on-surface synthesis of porous nanoribbons on Ag(111) and Ag(100) even though the self-assemblies of the intermediate organometallic structures and covalently-linked polymer chains are different on both surfaces. Furthermore, we present the formation of isolated porous nanoribbons by kinetic control. Our results give valuable insights into the role of substrate-induced templating effects and the reaction kinetics in the on-surface synthesis of conformationally flexible molecules.
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Affiliation(s)
- Maximilian Ammon
- Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erwin-Rommel-Straße 1, 91058, Erlangen, Germany
| | - Martin Haller
- Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erwin-Rommel-Straße 1, 91058, Erlangen, Germany
| | - Shadi Sorayya
- Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erwin-Rommel-Straße 1, 91058, Erlangen, Germany
| | - Sabine Maier
- Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erwin-Rommel-Straße 1, 91058, Erlangen, Germany
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14
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Clair S, de Oteyza DG. Controlling a Chemical Coupling Reaction on a Surface: Tools and Strategies for On-Surface Synthesis. Chem Rev 2019; 119:4717-4776. [PMID: 30875199 PMCID: PMC6477809 DOI: 10.1021/acs.chemrev.8b00601] [Citation(s) in RCA: 344] [Impact Index Per Article: 68.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Indexed: 01/06/2023]
Abstract
On-surface synthesis is appearing as an extremely promising research field aimed at creating new organic materials. A large number of chemical reactions have been successfully demonstrated to take place directly on surfaces through unusual reaction mechanisms. In some cases the reaction conditions can be properly tuned to steer the formation of the reaction products. It is thus possible to control the initiation step of the reaction and its degree of advancement (the kinetics, the reaction yield); the nature of the reaction products (selectivity control, particularly in the case of competing processes); as well as the structure, position, and orientation of the covalent compounds, or the quality of the as-formed networks in terms of order and extension. The aim of our review is thus to provide an extensive description of all tools and strategies reported to date and to put them into perspective. We specifically define the different approaches available and group them into a few general categories. In the last part, we demonstrate the effective maturation of the on-surface synthesis field by reporting systems that are getting closer to application-relevant levels thanks to the use of advanced control strategies.
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Affiliation(s)
- Sylvain Clair
- Aix
Marseille Univ., Université de Toulon, CNRS, IM2NP, Marseille, France
| | - Dimas G. de Oteyza
- Donostia
International Physics Center, San
Sebastián 20018, Spain
- Centro
de Física de Materiales CSIC-UPV/EHU-MPC, San Sebastián 20018, Spain
- Ikerbasque,
Basque Foundation for Science, Bilbao 48013, Spain
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15
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Ebeling D, Zhong Q, Schlöder T, Tschakert J, Henkel P, Ahles S, Chi L, Mollenhauer D, Wegner HA, Schirmeisen A. Adsorption Structure of Mono- and Diradicals on a Cu(111) Surface: Chemoselective Dehalogenation of 4-Bromo-3″-iodo- p-terphenyl. ACS NANO 2019; 13:324-336. [PMID: 30550265 DOI: 10.1021/acsnano.8b06283] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Selectivity is a key parameter for building customized organic nanostructures via bottom-up approaches. Therefore, strategies are needed that allow connecting molecular entities at a specific stage of the assembly process in a chemoselective manner. Studying the mechanisms of such reactions is the key to apply these transformations for the buildup of organic nanostructures on surfaces. Especially, the knowledge about the precise adsorption geometry of intermediates at different stages during the reaction process and their interactions with surface atoms or adatoms is of fundamental importance, since often catalytic processes are involved. We show the selective dehalogenation of 4-bromo-3″-iodo- p-terphenyl on the Cu(111) surface using bond imaging atomic force microscopy with CO-functionalized tips. The deiodination and debromination reactions are triggered either by heating or by locally applying voltage pulses with the tip. We observed a strong hierarchical behavior of the dehalogenation with respect to temperature and voltage. In connection with first-principles simulations we can determine the orientation and position of the pristine molecules as well as adsorbed mono/diradicals and the halogens. We find that the isolated radicals are chemisorbed to Cu(111) top sites, which are lifted by 16 pm ( meta-position) and 32 pm ( para-position) from the Cu surface plane. This leads to a strongly twisted and bent 3D adsorption structure. After heating, different types of dimers are observed whose molecules are either bound to surface atoms or connected via Cu adatoms. Such knowledge about the intermediate geometry and its interaction with the surface will open the way to rationally design syntheses on surfaces.
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Affiliation(s)
- Daniel Ebeling
- Institute of Applied Physics , Justus Liebig University Giessen , Heinrich-Buff-Ring 16 , 35392 Giessen , Germany
- Center for Materials Research (LaMa) , Justus Liebig University Giessen , Heinrich-Buff-Ring 16 , 35392 Giessen , Germany
| | - Qigang Zhong
- Institute of Applied Physics , Justus Liebig University Giessen , Heinrich-Buff-Ring 16 , 35392 Giessen , Germany
- Institute of Functional Nano & Soft Materials (FUNSOM) , Soochow University , 215123 Suzhou , People's Republic of China
| | - Tobias Schlöder
- Institute of Physical Chemistry , Justus Liebig University Giessen , Heinrich-Buff-Ring 17 , 35392 Giessen , Germany
| | - Jalmar Tschakert
- Institute of Applied Physics , Justus Liebig University Giessen , Heinrich-Buff-Ring 16 , 35392 Giessen , Germany
- Center for Materials Research (LaMa) , Justus Liebig University Giessen , Heinrich-Buff-Ring 16 , 35392 Giessen , Germany
| | - Pascal Henkel
- Center for Materials Research (LaMa) , Justus Liebig University Giessen , Heinrich-Buff-Ring 16 , 35392 Giessen , Germany
- Institute of Physical Chemistry , Justus Liebig University Giessen , Heinrich-Buff-Ring 17 , 35392 Giessen , Germany
| | - Sebastian Ahles
- Center for Materials Research (LaMa) , Justus Liebig University Giessen , Heinrich-Buff-Ring 16 , 35392 Giessen , Germany
- Institute of Organic Chemistry , Justus Liebig University Giessen , Heinrich-Buff-Ring 17 , 35392 Giessen , Germany
| | - Lifeng Chi
- Institute of Functional Nano & Soft Materials (FUNSOM) , Soochow University , 215123 Suzhou , People's Republic of China
| | - Doreen Mollenhauer
- Center for Materials Research (LaMa) , Justus Liebig University Giessen , Heinrich-Buff-Ring 16 , 35392 Giessen , Germany
- Institute of Physical Chemistry , Justus Liebig University Giessen , Heinrich-Buff-Ring 17 , 35392 Giessen , Germany
| | - Hermann A Wegner
- Center for Materials Research (LaMa) , Justus Liebig University Giessen , Heinrich-Buff-Ring 16 , 35392 Giessen , Germany
- Institute of Organic Chemistry , Justus Liebig University Giessen , Heinrich-Buff-Ring 17 , 35392 Giessen , Germany
| | - André Schirmeisen
- Institute of Applied Physics , Justus Liebig University Giessen , Heinrich-Buff-Ring 16 , 35392 Giessen , Germany
- Center for Materials Research (LaMa) , Justus Liebig University Giessen , Heinrich-Buff-Ring 16 , 35392 Giessen , Germany
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16
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Skidin D, Erdmann T, Nikipar S, Eisenhut F, Krüger J, Günther F, Gemming S, Kiriy A, Voit B, Ryndyk DA, Joachim C, Moresco F, Cuniberti G. Tuning the conductance of a molecular wire by the interplay of donor and acceptor units. NANOSCALE 2018; 10:17131-17139. [PMID: 30182095 DOI: 10.1039/c8nr05031g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We investigate the conductance of optimized donor-acceptor-donor molecular wires obtained by on-surface synthesis on the Au(111) surface. A careful balance between acceptors and donors is achieved using a diketopyrrolopyrrole acceptor and two thiophene donors per unit along the wire. Scanning tunneling microscopy imaging, spectroscopy, and conductance measurements done by pulling a single molecular wire at one end are presented. We show that the conductance of the obtained wires is among the highest reported so far in a tunneling transport regime, with an inverse decay length of 0.17 Å-1. Using complex band structure calculations, different donor and acceptor groups are discussed, showing how a balanced combination of donor and acceptor units along the wire can further minimize the decay of the tunneling current with length.
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Affiliation(s)
- Dmitry Skidin
- Institute for Materials Science, Max Bergmann Center of Biomaterials, TU Dresden, 01069 Dresden, Germany.
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17
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Cai L, Yu X, Liu M, Sun Q, Bao M, Zha Z, Pan J, Ma H, Ju H, Hu S, Xu L, Zou J, Yuan C, Jacob T, Björk J, Zhu J, Qiu X, Xu W. Direct Formation of C-C Double-Bonded Structural Motifs by On-Surface Dehalogenative Homocoupling of gem-Dibromomethyl Molecules. ACS NANO 2018; 12:7959-7966. [PMID: 30016072 DOI: 10.1021/acsnano.8b02459] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Conductive polymers are of great importance in a variety of chemistry-related disciplines and applications. The recently developed bottom-up on-surface synthesis strategy provides us with opportunities for the fabrication of various nanostructures in a flexible and facile manner, which could be investigated by high-resolution microscopic techniques in real space. Herein, we designed and synthesized molecular precursors functionalized with benzal gem-dibromomethyl groups. A combination of scanning tunneling microscopy, noncontact atomic force microscopy, high-resolution synchrotron radiation photoemission spectroscopy, and density functional theory calculations demonstrated that it is feasible to achieve the direct formation of C-C double-bonded structural motifs via on-surface dehalogenative homocoupling reactions on the Au(111) surface. Correspondingly, we convert the sp3-hybridized state to an sp2-hybridized state of carbon atoms, i. e., from an alkyl group to an alkenyl one. Moreover, by such a bottom-up strategy, we have successfully fabricated poly(phenylenevinylene) chains on the surface, which is anticipated to inspire further studies toward understanding the nature of conductive polymers at the atomic scale.
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Affiliation(s)
- Liangliang Cai
- Interdisciplinary Materials Research Center, College of Materials Science and Engineering , Tongji University , Caoan Road 4800 , Shanghai 201804 , People's Republic of China
| | - Xin Yu
- Interdisciplinary Materials Research Center, College of Materials Science and Engineering , Tongji University , Caoan Road 4800 , Shanghai 201804 , People's Republic of China
| | - Mengxi Liu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , People's Republic of China
| | - Qiang Sun
- Interdisciplinary Materials Research Center, College of Materials Science and Engineering , Tongji University , Caoan Road 4800 , Shanghai 201804 , People's Republic of China
| | - Meiling Bao
- Interdisciplinary Materials Research Center, College of Materials Science and Engineering , Tongji University , Caoan Road 4800 , Shanghai 201804 , People's Republic of China
| | - Zeqi Zha
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , People's Republic of China
- University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Jinliang Pan
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , People's Republic of China
- University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Honghong Ma
- Interdisciplinary Materials Research Center, College of Materials Science and Engineering , Tongji University , Caoan Road 4800 , Shanghai 201804 , People's Republic of China
| | - Huanxin Ju
- National Synchrotron Radiation Laboratory , University of Science and Technology of China , Hefei 230029 , People's Republic of China
| | - Shanwei Hu
- National Synchrotron Radiation Laboratory , University of Science and Technology of China , Hefei 230029 , People's Republic of China
| | - Liang Xu
- Interdisciplinary Materials Research Center, College of Materials Science and Engineering , Tongji University , Caoan Road 4800 , Shanghai 201804 , People's Republic of China
| | - Jiacheng Zou
- Interdisciplinary Materials Research Center, College of Materials Science and Engineering , Tongji University , Caoan Road 4800 , Shanghai 201804 , People's Republic of China
| | - Chunxue Yuan
- Interdisciplinary Materials Research Center, College of Materials Science and Engineering , Tongji University , Caoan Road 4800 , Shanghai 201804 , People's Republic of China
| | - Timo Jacob
- Institute of Electrochemistry , Ulm University , Albert Einstein Allee 47 , 89069 Ulm , Germany
| | - Jonas Björk
- Department of Physics, Chemistry and Biology, IFM , Linköping University , 581 83 Linköping , Sweden
| | - Junfa Zhu
- National Synchrotron Radiation Laboratory , University of Science and Technology of China , Hefei 230029 , People's Republic of China
| | - Xiaohui Qiu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , People's Republic of China
- University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Wei Xu
- Interdisciplinary Materials Research Center, College of Materials Science and Engineering , Tongji University , Caoan Road 4800 , Shanghai 201804 , People's Republic of China
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18
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Ding Y, Wang X, Xie L, Yao X, Xu W. Two-dimensional self-assembled nanostructures of nucleobases and their related derivatives on Au(111). Chem Commun (Camb) 2018; 54:9259-9269. [PMID: 30027963 DOI: 10.1039/c8cc03585g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The construction of two-dimensional (2D) self-assembled nanostructures has been one of the considerably interesting areas of on-surface chemistry in the past few decades, and has benefited from the rapid development and improvement of scanning probe microscopy techniques. In this research field, many attempts have been made in the controllable fabrication of well-ordered and multifunctional surface nanostructures, which attracted interest because of the prospect for artificial design of functional molecular nanodevices. DNA and RNA are considered to be programmable self-assembly systems and it is possible to use their base sequences to encode instructions for assembly in a predetermined fashion at the nanometer scale. As important constituents of nucleic acids, nucleobases, with intrinsic functional groups for hydrogen bonding, coordination bonding, and electrostatic interactions, can be employed as a potential system for the versatile construction of various biomolecular nanostructures, which may be used to structure the self-assembly of DNA-based artificial molecular constructions and play an important role in novel biosensors based on surface functionalization. In this article, we will review the recent progress of on-surface self-assembly of nucleobases and their derivatives together with different reactants (e.g., metals, halogens, salts and water), and as a result, various 2D surface nanostructures are summarized.
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Affiliation(s)
- Yuanqi Ding
- Interdisciplinary Materials Research Center, Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University, Shanghai 201804, P. R. China.
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19
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Zhong Q, Ebeling D, Tschakert J, Gao Y, Bao D, Du S, Li C, Chi L, Schirmeisen A. Symmetry breakdown of 4,4″-diamino-p-terphenyl on a Cu(111) surface by lattice mismatch. Nat Commun 2018; 9:3277. [PMID: 30115915 PMCID: PMC6095862 DOI: 10.1038/s41467-018-05719-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Accepted: 07/24/2018] [Indexed: 11/13/2022] Open
Abstract
Site-selective functionalization of only one of two identical chemical groups within one molecule is highly challenging, which hinders the production of complex organic macromolecules. Here we demonstrate that adsorption of 4,4″-diamino-p-terphenyl on a metal surface leads to a dissymmetric binding affinity. With low temperature atomic force microscopy, using CO-tip functionalization, we reveal the asymmetric adsorption geometries of 4,4″-diamino-p-terphenyl on Cu(111), while on Au(111) the symmetry is retained. This symmetry breaking on Cu(111) is caused by a lattice mismatch and interactions with the subsurface atomic layer. The dissymmetry results in a change of the binding affinity of one of the amine groups, leading to a non-stationary behavior under the influence of the scanning tip. Finally, we exploit this dissymmetric binding affinity for on-surface self-assembly with 4,4″-diamino-p-terphenyl for side-preferential attachment of 2-triphenylenecarbaldehyde. Our findings provide a new route towards surface-induced dissymmetric activation of a symmetric compound. In a symmetric molecule with identical functional groups, selective activation of only one site is challenging. Here, the authors show that 4,4″-diamino-p-terphenyl adsorbs asymmetrically to a metal surface, leading to a change in binding affinity of one of its amine groups.
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Affiliation(s)
- Qigang Zhong
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, P. R. China
| | - Daniel Ebeling
- Institute of Applied Physics, Justus-Liebig University, Heinrich-Buff-Ring 16, 35392, Giessen, Germany.
| | - Jalmar Tschakert
- Institute of Applied Physics, Justus-Liebig University, Heinrich-Buff-Ring 16, 35392, Giessen, Germany
| | - Yixuan Gao
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Deliang Bao
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Shixuan Du
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
| | - Chen Li
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, P. R. China
| | - Lifeng Chi
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, P. R. China.
| | - André Schirmeisen
- Institute of Applied Physics, Justus-Liebig University, Heinrich-Buff-Ring 16, 35392, Giessen, Germany
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20
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Jacobse PH, van den Hoogenband A, Moret ME, Klein Gebbink RJM, Swart I. Aryl Radical Geometry Determines Nanographene Formation on Au(111). Angew Chem Int Ed Engl 2018; 55:13052-13055. [PMID: 27632976 DOI: 10.1002/anie.201606440] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Indexed: 11/05/2022]
Abstract
The Ullmann coupling has been used extensively as a synthetic tool for the formation of C-C bonds on surfaces. Thus far, most syntheses made use of aryl bromides or aryl iodides. We investigated the applicability of an aryl chloride in the bottom-up assembly of graphene nanoribbons. Specifically, the reactions of 10,10'-dichloro-9,9'-bianthryl (DCBA) on Au(111) were studied. Using atomic resolution non-contact AFM, the structure of various coupling products and intermediates were resolved, allowing us to reveal the important role of the geometry of the intermediate aryl radicals in the formation mechanism. For the aryl chloride, cyclodehydrogenation occurs before dehalogenation and polymerization. Due to their geometry, the planar bisanthene radicals display a different coupling behavior compared to the staggered bianthryl radicals formed when aryl bromides are used. This results in oligo- and polybisanthenes with predominantly fluoranthene-type connections.
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Affiliation(s)
- Peter H Jacobse
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, PO Box 80000, 3508 TA, Utrecht, The Netherlands.,Organic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands
| | - Adri van den Hoogenband
- Organic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands
| | - Marc-Etienne Moret
- Organic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands.
| | - Robertus J M Klein Gebbink
- Organic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands
| | - Ingmar Swart
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, PO Box 80000, 3508 TA, Utrecht, The Netherlands.
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21
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Sun Q, Yu X, Bao M, Liu M, Pan J, Zha Z, Cai L, Ma H, Yuan C, Qiu X, Xu W. Direct Formation of C−C Triple-Bonded Structural Motifs by On-Surface Dehalogenative Homocouplings of Tribromomethyl-Substituted Arenes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201801056] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Qiang Sun
- Interdisciplinary Materials Research Center and College of Materials Science and Engineering; Tongji University; Shanghai 201804 P. R. China
| | - Xin Yu
- Interdisciplinary Materials Research Center and College of Materials Science and Engineering; Tongji University; Shanghai 201804 P. R. China
| | - Meiling Bao
- Interdisciplinary Materials Research Center and College of Materials Science and Engineering; Tongji University; Shanghai 201804 P. R. China
| | - Mengxi Liu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology; CAS Center for Excellence in Nanoscience; National Center for Nanoscience and Technology; Beijing 100190 China
| | - Jinliang Pan
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology; CAS Center for Excellence in Nanoscience; National Center for Nanoscience and Technology; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Zeqi Zha
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology; CAS Center for Excellence in Nanoscience; National Center for Nanoscience and Technology; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Liangliang Cai
- Interdisciplinary Materials Research Center and College of Materials Science and Engineering; Tongji University; Shanghai 201804 P. R. China
| | - Honghong Ma
- Interdisciplinary Materials Research Center and College of Materials Science and Engineering; Tongji University; Shanghai 201804 P. R. China
| | - Chunxue Yuan
- Interdisciplinary Materials Research Center and College of Materials Science and Engineering; Tongji University; Shanghai 201804 P. R. China
| | - Xiaohui Qiu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology; CAS Center for Excellence in Nanoscience; National Center for Nanoscience and Technology; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Wei Xu
- Interdisciplinary Materials Research Center and College of Materials Science and Engineering; Tongji University; Shanghai 201804 P. R. China
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22
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Sun Q, Yu X, Bao M, Liu M, Pan J, Zha Z, Cai L, Ma H, Yuan C, Qiu X, Xu W. Direct Formation of C−C Triple-Bonded Structural Motifs by On-Surface Dehalogenative Homocouplings of Tribromomethyl-Substituted Arenes. Angew Chem Int Ed Engl 2018; 57:4035-4038. [DOI: 10.1002/anie.201801056] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Qiang Sun
- Interdisciplinary Materials Research Center and College of Materials Science and Engineering; Tongji University; Shanghai 201804 P. R. China
| | - Xin Yu
- Interdisciplinary Materials Research Center and College of Materials Science and Engineering; Tongji University; Shanghai 201804 P. R. China
| | - Meiling Bao
- Interdisciplinary Materials Research Center and College of Materials Science and Engineering; Tongji University; Shanghai 201804 P. R. China
| | - Mengxi Liu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology; CAS Center for Excellence in Nanoscience; National Center for Nanoscience and Technology; Beijing 100190 China
| | - Jinliang Pan
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology; CAS Center for Excellence in Nanoscience; National Center for Nanoscience and Technology; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Zeqi Zha
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology; CAS Center for Excellence in Nanoscience; National Center for Nanoscience and Technology; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Liangliang Cai
- Interdisciplinary Materials Research Center and College of Materials Science and Engineering; Tongji University; Shanghai 201804 P. R. China
| | - Honghong Ma
- Interdisciplinary Materials Research Center and College of Materials Science and Engineering; Tongji University; Shanghai 201804 P. R. China
| | - Chunxue Yuan
- Interdisciplinary Materials Research Center and College of Materials Science and Engineering; Tongji University; Shanghai 201804 P. R. China
| | - Xiaohui Qiu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology; CAS Center for Excellence in Nanoscience; National Center for Nanoscience and Technology; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Wei Xu
- Interdisciplinary Materials Research Center and College of Materials Science and Engineering; Tongji University; Shanghai 201804 P. R. China
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23
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Wang CX, Jin Q, Shu CH, Hua X, Long YT, Liu PN. Dehydrogenative homocoupling of tetrafluorobenzene on Pd(111) via para-selective C-H activation. Chem Commun (Camb) 2018; 53:6347-6350. [PMID: 28555228 DOI: 10.1039/c7cc01476g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Aryl homocoupling reactions via meta- and ortho-selective C-H activation have been achieved on surfaces, but the highly important para-selective C-H activation has not been reported yet. Combined with scanning tunneling microscopy, time-of-flight secondary ion mass spectrometry and density functional theory, here we describe dehydrogenative homocoupling of tetrafluorobenzene on Pd(111) via para-selective C-H activation to form perfluorinated oligo(p-phenylene)s.
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Affiliation(s)
- Cheng-Xin Wang
- Shanghai Key Laboratory of Functional Materials Chemistry, State Key Laboratory of Chemical Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.
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24
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Zhou X, Dai J, Wu K. Steering on-surface reactions with self-assembly strategy. Phys Chem Chem Phys 2018; 19:31531-31539. [PMID: 29171852 DOI: 10.1039/c7cp06177c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The control of assembly structures that subsequently help achieve viable functionalities has been one of the key motivations for the exploration of surface molecular assembly. In terms of its functionality and applicability, the assembly is explored as a strategy to steer on-surface reactions primarily by two methods: assembly-assisted and assembly-involved reactions. The functions of the self-assembly strategy are threefold: tweaking reaction selectivities, steering reaction pathways, and directing reaction sites. The governing principle herein is that the assembly strategy can apply a surface confinement effect that affects the energy barrier and pre-exponential factor of the Arrhenius equation for the dynamics of the target reaction. Development of such a strategy may reveal new routes to steer on-surface reactions and even single molecule properties in surface chemistry.
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Affiliation(s)
- Xiong Zhou
- BNLMS, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
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25
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Smerieri M, Píš I, Ferrighi L, Nappini S, Lusuan A, Vattuone L, Vaghi L, Papagni A, Magnano E, Di Valentin C, Bondino F, Savio L. Synthesis of corrugated C-based nanostructures by Br-corannulene oligomerization. Phys Chem Chem Phys 2018; 20:26161-26172. [DOI: 10.1039/c8cp04791j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structure and electronic properties of carbon-based nanostructures obtained by metal surface assisted synthesis is highly dependent on the nature of the precursor molecule.
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Affiliation(s)
| | - Igor Píš
- Elettra-Sincrotrone Trieste S.C.p.A
- 34149 Basovizza (TS)
- Italy
- IOM-CNR
- Laboratorio TASC
| | - Lara Ferrighi
- Dipartimento di Scienza dei Materiali
- Università di Milano-Bicocca
- 20125 Milano
- Italy
| | | | | | - Luca Vattuone
- IMEM-CNR
- UOS Genova
- 16146 Genova
- Italy
- Dipartimento di Fisica
| | - Luca Vaghi
- Dipartimento di Scienza dei Materiali
- Università di Milano-Bicocca
- 20125 Milano
- Italy
| | - Antonio Papagni
- Dipartimento di Scienza dei Materiali
- Università di Milano-Bicocca
- 20125 Milano
- Italy
| | - Elena Magnano
- IOM-CNR
- Laboratorio TASC
- 34149 Basovizza (TS)
- Italy
- Department of Physics
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26
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Zhang Y, Ding Y, Xie L, Ma H, Yao X, Zhang C, Yuan C, Xu W. On-Surface Synthesis of Adenine Oligomers via Ullmann Reaction. Chemphyschem 2017; 18:3544-3547. [PMID: 29028154 DOI: 10.1002/cphc.201701009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 10/12/2017] [Indexed: 11/07/2022]
Abstract
Despite the fact that DNA bases have been well-studied on surface, the on-surface synthesis of one-dimensional DNA analogs through in situ reactions is still an interesting topic to be investigated. Herein, from the interplay of high-resolution scanning tunneling microscopy (STM) imaging and density functional theory (DFT) calculations, we have delicately designed a halogenated derivative of adenine as precursor to realize the combination of DNA bases and Ullmann reaction, and then successfully synthesized adenine oligomers on Au(111) via Ullmann coupling. This model system provides a possible bottom-up strategy of fabricating adenine oligomers on surface, which may further give access to man-made DNA strands with multiple bases.
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Affiliation(s)
- Yanmin Zhang
- Interdisciplinary Materials Research Center, Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University, Caoan Road 4800, Shanghai, 201804, P. R. China
| | - Yuanqi Ding
- Interdisciplinary Materials Research Center, Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University, Caoan Road 4800, Shanghai, 201804, P. R. China
| | - Lei Xie
- Interdisciplinary Materials Research Center, Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University, Caoan Road 4800, Shanghai, 201804, P. R. China
| | - Honghong Ma
- Interdisciplinary Materials Research Center, Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University, Caoan Road 4800, Shanghai, 201804, P. R. China
| | - Xinyi Yao
- Interdisciplinary Materials Research Center, Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University, Caoan Road 4800, Shanghai, 201804, P. R. China
| | - Chi Zhang
- Interdisciplinary Materials Research Center, Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University, Caoan Road 4800, Shanghai, 201804, P. R. China
| | - Chunxue Yuan
- Interdisciplinary Materials Research Center, Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University, Caoan Road 4800, Shanghai, 201804, P. R. China
| | - Wei Xu
- Interdisciplinary Materials Research Center, Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University, Caoan Road 4800, Shanghai, 201804, P. R. China
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27
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Xie L, Zhang C, Ding Y, Xu W. Structural Transformation and Stabilization of Metal-Organic Motifs Induced by Halogen Doping. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702589] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lei Xie
- Interdisciplinary Materials Research Center, Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials; College of Materials Science and Engineering; Tongji University; Shanghai 201804 P.R. China
| | - Chi Zhang
- Interdisciplinary Materials Research Center, Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials; College of Materials Science and Engineering; Tongji University; Shanghai 201804 P.R. China
| | - Yuanqi Ding
- Interdisciplinary Materials Research Center, Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials; College of Materials Science and Engineering; Tongji University; Shanghai 201804 P.R. China
| | - Wei Xu
- Interdisciplinary Materials Research Center, Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials; College of Materials Science and Engineering; Tongji University; Shanghai 201804 P.R. China
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28
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Xie L, Zhang C, Ding Y, Xu W. Structural Transformation and Stabilization of Metal-Organic Motifs Induced by Halogen Doping. Angew Chem Int Ed Engl 2017; 56:5077-5081. [DOI: 10.1002/anie.201702589] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Lei Xie
- Interdisciplinary Materials Research Center, Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials; College of Materials Science and Engineering; Tongji University; Shanghai 201804 P.R. China
| | - Chi Zhang
- Interdisciplinary Materials Research Center, Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials; College of Materials Science and Engineering; Tongji University; Shanghai 201804 P.R. China
| | - Yuanqi Ding
- Interdisciplinary Materials Research Center, Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials; College of Materials Science and Engineering; Tongji University; Shanghai 201804 P.R. China
| | - Wei Xu
- Interdisciplinary Materials Research Center, Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials; College of Materials Science and Engineering; Tongji University; Shanghai 201804 P.R. China
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29
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On-surface synthesis of aligned functional nanoribbons monitored by scanning tunnelling microscopy and vibrational spectroscopy. Nat Commun 2017; 8:14735. [PMID: 28368038 PMCID: PMC5382267 DOI: 10.1038/ncomms14735] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 01/26/2017] [Indexed: 01/12/2023] Open
Abstract
In the blooming field of on-surface synthesis, molecular building blocks are designed to self-assemble and covalently couple directly on a well-defined surface, thus allowing the exploration of unusual reaction pathways and the production of specific compounds in mild conditions. Here we report on the creation of functionalized organic nanoribbons on the Ag(110) surface. C–H bond activation and homo-coupling of the precursors is achieved upon thermal activation. The anisotropic substrate acts as an efficient template fostering the alignment of the nanoribbons, up to the full monolayer regime. The length of the nanoribbons can be sequentially increased by controlling the annealing temperature, from dimers to a maximum length of about 10 nm, limited by epitaxial stress. The different structures are characterized by room-temperature scanning tunnelling microscopy. Distinct signatures of the covalent coupling are measured with high-resolution electron energy loss spectroscopy, as supported by density functional theory calculations. On-surface synthesis, in which molecular units assemble and couple on a defined surface, can access rare reaction pathways and products. Here, the authors synthesize functionalized organic nanoribbons on the Ag(110) surface, and monitor the evolution of the covalent reactions by an unorthodox vibrational spectroscopy approach.
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30
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Chen M, Shang J, Wang Y, Wu K, Kuttner J, Hilt G, Hieringer W, Gottfried JM. On-Surface Synthesis and Characterization of Honeycombene Oligophenylene Macrocycles. ACS NANO 2017; 11:134-143. [PMID: 27983779 DOI: 10.1021/acsnano.6b05709] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report the on-surface formation and characterization of [30]-honeycombene, a cyclotriacontaphenylene, which consists of 30 phenyl rings (C180H120) and has a diameter of 4.0 nm. This shape-persistent, conjugated, and unsubstituted hexagonal hydrocarbon macrocycle was obtained by solvent-free synthesis on a silver (111) single-crystal surface, making solubility-enhancing alkyl side groups unnecessary. Side products include strained macrocycles with square, pentagonal, and heptagonal shape. The molecules were characterized by scanning tunneling microscopy and density functional theory (DFT) calculations. On the Ag(111) surface, the macrocycles act as molecular quantum corrals and lead to the confinement of surface-state electrons inside the central cavity. The energy of the confined surface state correlates with the size of the macrocycle and is well described by a particle-in-the-box model. Tunneling spectroscopy suggests conjugation within the planar rings and reveals influences of self-assembly on the electronic structure. While the adsorbed molecules appear to be approximately planar, the free molecules have nonplanar conformation, according to DFT.
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Affiliation(s)
- Min Chen
- Fachbereich Chemie, Philipps-Universität Marburg , Hans-Meerwein-Straße 4, 35032 Marburg, Germany
| | | | | | | | - Julian Kuttner
- Fachbereich Chemie, Philipps-Universität Marburg , Hans-Meerwein-Straße 4, 35032 Marburg, Germany
| | - Gerhard Hilt
- Fachbereich Chemie, Philipps-Universität Marburg , Hans-Meerwein-Straße 4, 35032 Marburg, Germany
| | - Wolfgang Hieringer
- Lehrstuhl für Theoretische Chemie and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg , Egerlandstraße 3, 91058 Erlangen, Germany
| | - J Michael Gottfried
- Fachbereich Chemie, Philipps-Universität Marburg , Hans-Meerwein-Straße 4, 35032 Marburg, Germany
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31
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32
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Smerieri M, Píš I, Ferrighi L, Nappini S, Lusuan A, Di Valentin C, Vaghi L, Papagni A, Cattelan M, Agnoli S, Magnano E, Bondino F, Savio L. Synthesis of graphene nanoribbons with a defined mixed edge-site sequence by surface assisted polymerization of (1,6)-dibromopyrene on Ag(110). NANOSCALE 2016; 8:17843-17853. [PMID: 27714142 DOI: 10.1039/c6nr05952j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
By a combination of scanning tunneling microscopy, X-ray spectroscopic techniques and density functional theory calculations, we prove the formation of extended patterns of parallel, graphene nanoribbons with alternate zig-zag and armchair edges and selected width by surface-assisted Ullmann coupling polymerization and dehydrogenation of 1,6-dibromopyrene (C16H8Br2). Besides the relevance of these nanostructures for their possible application in nanodevices, we demonstrate the peculiarity of halogenated pyrene derivatives for the formation of nanoribbons, in particular on Ag(110). These results open the possibility of tuning the shape and dimension of nanoribbons (and hence the correlated electronic properties) by choosing suitably tailored or on-purpose designed molecular precursors.
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Affiliation(s)
- Marco Smerieri
- IMEM-CNR, UOS Genova, Via Dodecaneso 33, 16146 Genova, Italy.
| | - Igor Píš
- Elettra-Sincrotrone Trieste S.C.p.A., S.S. 14 km 163.5, 34149 Basovizza (TS), Italy. and IOM-CNR, Laboratorio TASC, S.S. 14 km 163.5, 34149 Basovizza (TS), Italy
| | - Lara Ferrighi
- Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, Via R. Cozzi 55, 20125 Milano, Italy
| | - Silvia Nappini
- IOM-CNR, Laboratorio TASC, S.S. 14 km 163.5, 34149 Basovizza (TS), Italy
| | - Angelique Lusuan
- IMEM-CNR, UOS Genova, Via Dodecaneso 33, 16146 Genova, Italy. and Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy
| | - Cristiana Di Valentin
- Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, Via R. Cozzi 55, 20125 Milano, Italy
| | - Luca Vaghi
- Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, Via R. Cozzi 55, 20125 Milano, Italy
| | - Antonio Papagni
- Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, Via R. Cozzi 55, 20125 Milano, Italy
| | - Mattia Cattelan
- Department of Chemical Science, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
| | - Stefano Agnoli
- Department of Chemical Science, University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
| | - Elena Magnano
- IOM-CNR, Laboratorio TASC, S.S. 14 km 163.5, 34149 Basovizza (TS), Italy and Department of Physics, University of Johannesburg, PO Box 524, Auckland Park, 2006, Johannesburg, South Africa
| | - Federica Bondino
- IOM-CNR, Laboratorio TASC, S.S. 14 km 163.5, 34149 Basovizza (TS), Italy
| | - Letizia Savio
- IMEM-CNR, UOS Genova, Via Dodecaneso 33, 16146 Genova, Italy.
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33
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Jacobse PH, van den Hoogenband A, Moret ME, Klein Gebbink RJM, Swart I. Aryl Radical Geometry Determines Nanographene Formation on Au(111). Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606440] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Peter H. Jacobse
- Condensed Matter and Interfaces; Debye Institute for Nanomaterials Science; Utrecht University; PO Box 80000 3508 TA Utrecht The Netherlands
- Organic Chemistry and Catalysis; Debye Institute for Nanomaterials Science; Utrecht University; Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Adri van den Hoogenband
- Organic Chemistry and Catalysis; Debye Institute for Nanomaterials Science; Utrecht University; Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Marc-Etienne Moret
- Organic Chemistry and Catalysis; Debye Institute for Nanomaterials Science; Utrecht University; Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Robertus J. M. Klein Gebbink
- Organic Chemistry and Catalysis; Debye Institute for Nanomaterials Science; Utrecht University; Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Ingmar Swart
- Condensed Matter and Interfaces; Debye Institute for Nanomaterials Science; Utrecht University; PO Box 80000 3508 TA Utrecht The Netherlands
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34
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35
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Sun Q, Cai L, Ding Y, Ma H, Yuan C, Xu W. Single-molecule insight into Wurtz reactions on metal surfaces. Phys Chem Chem Phys 2016; 18:2730-5. [PMID: 26725836 DOI: 10.1039/c5cp06459g] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Wurtz reactions feature the dehalogenated coupling of alkyl halides. In comparison to their widely investigated counterparts, Ullmann reactions, Wurtz reactions have however been scarcely explored on surfaces. Herein, by combining high-resolution STM imaging and DFT calculations, we have systematically investigated Wurtz reactions on three chemically different metal surfaces including Cu(110), Ag(110) and Au(111). We find that the Wurtz reactions could be achieved on all three surfaces, and the temperatures for triggering the reactions are in the order of Cu(110) > Ag(110) > Au(111). Moreover, DFT calculations have been performed to unravel the pathways of on-surface Wurtz reactions and identify three basic steps of the reactions including debromination, diffusion and coupling processes. Interestingly, we found that the mechanism of the on-surface Wurtz reaction is intrinsically different from the Ullmann reaction and it is revealed that the coupling process is the rate-limiting step of Wurtz reactions on three different substrates. These findings have given a comprehensive picture of Wurtz reactions on metal surfaces and demonstrated that such a reaction could be an alternative reaction scheme for advanced on-surface synthesis.
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Affiliation(s)
- Qiang Sun
- Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University, Caoan Road 4800, Shanghai 201804, P. R. China.
| | - Liangliang Cai
- Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University, Caoan Road 4800, Shanghai 201804, P. R. China.
| | - Yuanqi Ding
- Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University, Caoan Road 4800, Shanghai 201804, P. R. China.
| | - Honghong Ma
- Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University, Caoan Road 4800, Shanghai 201804, P. R. China.
| | - Chunxue Yuan
- Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University, Caoan Road 4800, Shanghai 201804, P. R. China.
| | - Wei Xu
- Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University, Caoan Road 4800, Shanghai 201804, P. R. China.
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36
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Sun Q, Cai L, Ma H, Yuan C, Xu W. The stereoselective synthesis of dienes through dehalogenative homocoupling of terminal alkenyl bromides on Cu(110). Chem Commun (Camb) 2016; 52:6009-12. [PMID: 27063567 DOI: 10.1039/c6cc01059h] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have successfully achieved the stereoselective synthesis of a specific cis-diene moiety through a dehalogenative homocoupling of alkenyl bromides on the Cu(110) surface, where the formation of a cis-form organometallic intermediate is the key to such a stereoselectivity as determined by DFT calculations.
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Affiliation(s)
- Qiang Sun
- Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University, Caoan Road 4800, Shanghai 201804, P. R. China.
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37
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Fan Q, Dai J, Wang T, Kuttner J, Hilt G, Gottfried JM, Zhu J. Confined Synthesis of Organometallic Chains and Macrocycles by Cu-O Surface Templating. ACS NANO 2016; 10:3747-54. [PMID: 26928582 DOI: 10.1021/acsnano.6b00366] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The bottom-up construction of low-dimensional macromolecular nanostructures directly on a surface is a promising approach for future application in molecular electronics and integrated circuit production. However, challenges still remain in controlling the formation of these nanostructures with predetermined patterns (such as linear or cyclic) or dimensions (such as the length of one-dimensional (1D) chains). Here, we demonstrate that a high degree of structural control can be achieved by employing a Cu(110)-(2×1)O nanotemplate for the confined synthesis of organometallic chains and macrocycles. This template contains ordered arrays of alternating stripes of Cu-O chains and bare Cu, the widths of which are controllable. Using scanning tunneling microscopy and low-energy electron diffraction, we show that well-defined, ordered 1D zigzag organometallic oligomeric chains with uniform lengths can be fabricated on the Cu stripes (width >5.6 nm) of the Cu(110)-(2×1)O surface. In addition, the lengths of the meta-terphenyl (MTP)-based chains can be adjusted by controlling the widths of the Cu stripes within a certain range. When reducing the widths of Cu stripes to a range of 2.6 to 5.6 nm, organometallic macrocycles including tetramer (MTP-Cu)4, hexamer (MTP-Cu)6, and octamer (MTP-Cu)8 species are formed due to the spatial confinement effect and attraction to the Cu-O chains. An overview of all formed organometallic macrocycles on the Cu stripes with different widths reveals that the origin of the formation of these macrocycles is the cis-configured organometallic dimer (MTP)2Cu3, which was observed on the extremely narrow Cu stripe with a width of 1.5 nm.
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Affiliation(s)
- Qitang Fan
- National Synchrotron Radiation Laboratory and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China , Hefei 230029, People's Republic of China
| | - Jingya Dai
- National Synchrotron Radiation Laboratory and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China , Hefei 230029, People's Republic of China
| | - Tao Wang
- National Synchrotron Radiation Laboratory and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China , Hefei 230029, People's Republic of China
| | - Julian Kuttner
- Fachbereich Chemie, Philipps-Universität Marburg , Hans-Meerwein-Straße, 35032 Marburg, Germany
| | - Gerhard Hilt
- Fachbereich Chemie, Philipps-Universität Marburg , Hans-Meerwein-Straße, 35032 Marburg, Germany
| | - J Michael Gottfried
- Fachbereich Chemie, Philipps-Universität Marburg , Hans-Meerwein-Straße, 35032 Marburg, Germany
| | - Junfa Zhu
- National Synchrotron Radiation Laboratory and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China , Hefei 230029, People's Republic of China
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38
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Basagni A, Vasseur G, Pignedoli CA, Vilas-Varela M, Peña D, Nicolas L, Vitali L, Lobo-Checa J, de Oteyza DG, Sedona F, Casarin M, Ortega JE, Sambi M. Tunable Band Alignment with Unperturbed Carrier Mobility of On-Surface Synthesized Organic Semiconducting Wires. ACS NANO 2016; 10:2644-51. [PMID: 26841052 PMCID: PMC4783043 DOI: 10.1021/acsnano.5b07683] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 02/03/2016] [Indexed: 05/25/2023]
Abstract
The tunable properties of molecular materials place them among the favorites for a variety of future generation devices. In addition, to maintain the current trend of miniaturization of those devices, a departure from the present top-down production methods may soon be required and self-assembly appears among the most promising alternatives. On-surface synthesis unites the promises of molecular materials and of self-assembly, with the sturdiness of covalently bonded structures: an ideal scenario for future applications. Following this idea, we report the synthesis of functional extended nanowires by self-assembly. In particular, the products correspond to one-dimensional organic semiconductors. The uniaxial alignment provided by our substrate templates allows us to access with exquisite detail their electronic properties, including the full valence band dispersion, by combining local probes with spatial averaging techniques. We show how, by selectively doping the molecular precursors, the product's energy level alignment can be tuned without compromising the charge carrier's mobility.
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Affiliation(s)
- Andrea Basagni
- Dipartimento di Scienze Chimiche, Università Degli
Studi di Padova, Padova 35131, Italy
| | - Guillaume Vasseur
- Donostia International
Physics Center (DIPC), Paseo Manuel Lardizabal 4, E-20018 San Sebastián, Spain
- Centro de
Física de Materiales (CSIC/UPV-EHU), Materials Physics Center, Paseo Manuel Lardizabal 5, E-20018 San Sebastián, Spain
| | - Carlo A. Pignedoli
- NCCR MARVEL,
Empa, Swiss Federal Laboratories for Materials
Science and Technology, Dübendorf CH-8600, Switzerland
| | - Manuel Vilas-Varela
- Centro
de Investigación en Química Biolóxica e Materiais
Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Diego Peña
- Centro
de Investigación en Química Biolóxica e Materiais
Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Louis Nicolas
- Dipartimento di Scienze Chimiche, Università Degli
Studi di Padova, Padova 35131, Italy
- École Normale Supérieure
de Cachan, Cachan 94230, France
| | - Lucia Vitali
- Centro de
Física de Materiales (CSIC/UPV-EHU), Materials Physics Center, Paseo Manuel Lardizabal 5, E-20018 San Sebastián, Spain
- Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
| | - Jorge Lobo-Checa
- Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC-Universidad de Zaragoza, E-50009 Zaragoza, Spain
- Departamento de Física de la Materia Condensada, Universidad de Zaragoza, E-50009 Zaragoza, Spain
| | - Dimas G. de Oteyza
- Donostia International
Physics Center (DIPC), Paseo Manuel Lardizabal 4, E-20018 San Sebastián, Spain
- Centro de
Física de Materiales (CSIC/UPV-EHU), Materials Physics Center, Paseo Manuel Lardizabal 5, E-20018 San Sebastián, Spain
- Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
| | - Francesco Sedona
- Dipartimento di Scienze Chimiche, Università Degli
Studi di Padova, Padova 35131, Italy
| | - Maurizio Casarin
- Dipartimento di Scienze Chimiche, Università Degli
Studi di Padova, Padova 35131, Italy
| | - J. Enrique Ortega
- Donostia International
Physics Center (DIPC), Paseo Manuel Lardizabal 4, E-20018 San Sebastián, Spain
- Centro de
Física de Materiales (CSIC/UPV-EHU), Materials Physics Center, Paseo Manuel Lardizabal 5, E-20018 San Sebastián, Spain
- Departamento de Fisica Aplicada I, Universidad del Pais Vasco, E-20018 San Sebastián, Spain
| | - Mauro Sambi
- Dipartimento di Scienze Chimiche, Università Degli
Studi di Padova, Padova 35131, Italy
- Consorzio INSTM, Unità di Ricerca
di Padova, I-35131 Padova, Italy
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39
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Sun Q, Cai L, Wang S, Widmer R, Ju H, Zhu J, Li L, He Y, Ruffieux P, Fasel R, Xu W. Bottom-Up Synthesis of Metalated Carbyne. J Am Chem Soc 2016; 138:1106-9. [PMID: 26780188 DOI: 10.1021/jacs.5b10725] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Because of stability issues, carbyne, a one-dimensional chain of carbon atoms, has been much less investigated than other recent carbon allotropes such as graphene. Beyond that, metalation of such a linear carbon nanostructure with regularly distributed metal atoms is even more challenging. Here we report a successful on-surface synthesis of metalated carbyne chains by dehydrogenative coupling of ethyne molecules and copper atoms on a Cu(110) surface under ultrahigh-vacuum conditions. The length of the fabricated metalated carbyne chains was found to extend to the submicron scale (with the longest ones up to ∼120 nm). We expect that the herein-developed on-surface synthesis strategy for the efficient synthesis of organometallic carbon-based nanostructures will inspire more extensive experimental investigations of their physicochemical properties and explorations of their potential with respect to technological applications.
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Affiliation(s)
- Qiang Sun
- Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University , Caoan Road 4800, Shanghai 201804, P. R. China
| | - Liangliang Cai
- Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University , Caoan Road 4800, Shanghai 201804, P. R. China
| | - Shiyong Wang
- Empa, Swiss Federal Laboratories for Materials Science and Technology , 8600 Dübendorf, Switzerland
| | - Roland Widmer
- Empa, Swiss Federal Laboratories for Materials Science and Technology , 8600 Dübendorf, Switzerland
| | - Huanxin Ju
- National Synchrotron Radiation Laboratory, University of Science and Technology of China , Hefei 230029, P. R. China
| | - Junfa Zhu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China , Hefei 230029, P. R. China
| | - Lei Li
- Ministry-of-Education Key Laboratory of Green Preparation and Application for Functional Materials, Faculty of Materials Science & Engineering, Hubei University , Wuhan 430062, P. R. China
| | - Yunbin He
- Ministry-of-Education Key Laboratory of Green Preparation and Application for Functional Materials, Faculty of Materials Science & Engineering, Hubei University , Wuhan 430062, P. R. China
| | - Pascal Ruffieux
- Empa, Swiss Federal Laboratories for Materials Science and Technology , 8600 Dübendorf, Switzerland
| | - Roman Fasel
- Empa, Swiss Federal Laboratories for Materials Science and Technology , 8600 Dübendorf, Switzerland.,Department of Chemistry and Biochemistry, University of Bern , 3012 Bern, Switzerland
| | - Wei Xu
- Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University , Caoan Road 4800, Shanghai 201804, P. R. China
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Fan Q, Gottfried JM, Zhu J. Surface-catalyzed C-C covalent coupling strategies toward the synthesis of low-dimensional carbon-based nanostructures. Acc Chem Res 2015; 48:2484-94. [PMID: 26194462 DOI: 10.1021/acs.accounts.5b00168] [Citation(s) in RCA: 199] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Carbon-based nanostructures have attracted tremendous interest because of their versatile and tunable properties, which depend on the bonding type of the constituting carbon atoms. Graphene, as the most prominent representative of the π-conjugated carbon-based materials, consists entirely of sp(2)-hybridized carbon atoms and exhibits a zero band gap. Recently, countless efforts were made to open and tune the band gap of graphene for its applications in semiconductor devices. One promising method is periodic perforation, resulting in a graphene nanomesh (GNM), which opens the band gap while maintaining the exceptional transport properties. However, the typically employed lithographic approach for graphene perforation is difficult to control at the atomic level. The complementary bottom-up method using surface-assisted carbon-carbon (C-C) covalent coupling between organic molecules has opened up new possibilities for atomically precise fabrication of conjugated nanostructures like GNM and graphene nanoribbons (GNR), although with limited maturity. A general drawback of the bottom-up approach is that the desired structure usually does not represent the global thermodynamic minimum. It is therefore impossible to improve the long-range order by postannealing, because once the C-C bond formation becomes reversible, graphene as the thermodynamically most stable structure will be formed. This means that only carefully chosen precursors and reaction conditions can lead to the desired (non-graphene) material. One of the most popular and frequently used organic reactions for on-surface C-C coupling is the Ullmann reaction of aromatic halides. While experimentally simple to perform, the irreversibility of the C-C bond formation makes it a challenge to obtain long-range ordered nanostructures. With no postreaction structural improvement possible, the assembly process must be optimized to result in defect-free nanostructures during the initial reaction, requiring complete reaction of the precursors in the right positions. Incomplete connections typically result when mobile precursor monomers are blocked from reaching unsaturated reaction sites of the preformed nanostructures. For example, monomers may not be able to reach a randomly formed internal cavity of a two-dimensional (2D) nanostructure island due to steric hindrance in 2D confinement, leaving reaction sites in the internal cavity unsaturated. Wrong connections between precursor monomers, here defined as intermolecular C-C bonds forcing the monomer into a nonideal position within the structure, are usually irreversible and can induce further structural defects. The relative conformational flexibility of the monomer backbones permits connections between deformed monomers when they encounter strong steric hindrance. This, however, usually leads to heterogeneous structural motifs in the formed nanostructures. This Account reviews some of the latest developments regarding on-surface C-C coupling strategies toward the synthesis of carbon-based nanostructures by addressing the above-mentioned issues. The strategies include Ullmann coupling and other, "cleaner" alternative C-C coupling reactions like Glaser coupling, cyclo-dehydrogenation, and dehydrogenative coupling. The choice of substrate materials and precursor designs is crucial for optimizing substrate reactivity and precursor diffusion rates, and to reduce events of wrong linkage. Hierarchical polymerization is employed to steer the coupling route, which effectively improves the completeness of the reaction. Effects of byproducts on nanostructure formation is comprehended with both experimental and theoretical studies.
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Affiliation(s)
- Qitang Fan
- National
Synchrotron Radiation Laboratory and Collaborative Innovation Center
of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230029, People’s Republic of China
| | - J. Michael Gottfried
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany
| | - Junfa Zhu
- National
Synchrotron Radiation Laboratory and Collaborative Innovation Center
of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230029, People’s Republic of China
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Demkowicz S, Kozak W, Daśko M, Masłyk M, Kubiński K, Rachon J. Phosphate and Thiophosphate Biphenyl Analogs as Steroid Sulfatase Inhibitors. Drug Dev Res 2015; 76:94-104. [DOI: 10.1002/ddr.21245] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 02/14/2015] [Indexed: 12/16/2022]
Affiliation(s)
- Sebastian Demkowicz
- Department of Organic Chemistry, Chemical Faculty; Gdansk University of Technology; Narutowicza 11/12 80-233 Gdansk Poland
| | - Witold Kozak
- Department of Organic Chemistry, Chemical Faculty; Gdansk University of Technology; Narutowicza 11/12 80-233 Gdansk Poland
| | - Mateusz Daśko
- Department of Organic Chemistry, Chemical Faculty; Gdansk University of Technology; Narutowicza 11/12 80-233 Gdansk Poland
| | - Maciej Masłyk
- Department of Molecular Biology, Faculty of Biotechnology and Environment Sciences; The John Paul II Catholic University of Lublin; Konstantynów 1i 20-708 Lublin Poland
| | - Konrad Kubiński
- Department of Molecular Biology, Faculty of Biotechnology and Environment Sciences; The John Paul II Catholic University of Lublin; Konstantynów 1i 20-708 Lublin Poland
| | - Janusz Rachon
- Department of Organic Chemistry, Chemical Faculty; Gdansk University of Technology; Narutowicza 11/12 80-233 Gdansk Poland
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Sun Q, Cai L, Ding Y, Xie L, Zhang C, Tan Q, Xu W. Dehydrogenative homocoupling of terminal alkenes on copper surfaces: a route to dienes. Angew Chem Int Ed Engl 2015; 54:4549-52. [PMID: 25704284 DOI: 10.1002/anie.201412307] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Indexed: 11/07/2022]
Abstract
Homocouplings of hydrocarbon groups including alkynyl (sp(1) ), alkyl (sp(3) ), and aryl (sp(2) ) have recently been investigated on surfaces with the interest of fabricating novel carbon nanostructures/nanomaterials and getting fundamental understanding. Investigated herein is the on-surface homocoupling of an alkenyl group which is the last elementary unit of hydrocarbons. Through real-space direct visualization (scanning tunneling microscopy imaging) and density functional theory calculations, the two terminal alkenyl groups were found to couple into a diene moiety on copper surfaces, and is contrary to the common dimerization products of alkenes in solution. Furthermore, detailed DFT-based transition-state searches were performed to unravel this new reaction pathway.
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Affiliation(s)
- Qiang Sun
- Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University, Caoan Road 4800, Shanghai 201804 (P.R. China)
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Sun Q, Cai L, Ding Y, Xie L, Zhang C, Tan Q, Xu W. Dehydrogenative Homocoupling of Terminal Alkenes on Copper Surfaces: A Route to Dienes. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201412307] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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