Recent progress on surface chemistry I: Assembly and reaction

Li, Xin; Xu, Zhen; Bu, Donglei; Cai, Jinming; Chen, Huamei; Chen, Qi; Chen, Ting; Cheng, Fang; Chi, Lifeng; Dong, Wenjie; Dong, Zhenchao; Du, Shixuan; Fan, Qitang; Fan, Xing; Fu, Qiang; Gao, Song; Guo, Jing; Guo, Weijun; He, Yang; Hou, Shimin; Jiang, Ying; Kong, Huihui; Li, Baojun; Li, Dengyuan; Li, Jie; Li, Qing; Li, Ruoning; Li, Shuying; Lin, Yuxuan; Liu, Mengxi; Liu, Peinian; Liu, Yanyan; Lü, Jingtao; Ma, Chuanxu; Pan, Haoyang; Pan, JinLiang; Pan, Minghu; Qiu, Xiaohui; Shen, Ziyong; Tan, Shijing; Wang, Bing; Wang, Dong; Wang, Li; Wang, Lili; Wang, Tao; Wang, Xiang; Wang, Xingyue; Wang, Xueyan; Wang, Yansong; Wang, Yu; Wu, Kai; Xu, Wei; Xue, Na; Yan, Linghao; Yang, Fan; Yang, Zhiyong; Zhang, Chi; Zhang, Xue; Zhang, Yang; Zhang, Yao; Zhou, Xiong; Zhu, Junfa; Zhang, Yajie; Gao, Feixue; Wang, Yongfeng

doi:10.1016/j.cclet.2024.110055

Chinese Chemical Letters

2024

DOI: 10.1016/j.cclet.2024.110055

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Recent progress on surface chemistry I: Assembly and reaction

Xin Li,

Zhen Xu,

Donglei Bu

et al.

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2024

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Cited by 3 publications

References 484 publications

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A Cascade Reaction Triggered by H‐H Steric Hindrance: Dimeric Covalent Organic Frameworks on Au(111) and Dimeric Nanoribbons on Ag(111)

Fu,

Lu,

Geng

et al. 2024

Chin. J. Chem.

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Comprehensive SummaryIn on‐surface synthesis, dimers are typically utilized to explore reaction mechanisms or as intermediates in the formation of final products. However, constructing the innovative nanostructures with dimers as building blocks remains challenging. Here, using non‐planar 2,2′,7,7′‐tetrabromo‐9,9′‐biflurenyliden molecules, we have successfully synthesized dimeric covalent organic frameworks (COFs) on the Au(111) surface through a temperature‐controlled cascade reaction. Notably, the H‐H steric hindrance within precursors caused by double bonds leads to selective stepwise debromination during the thermal annealing, which promotes the dimerization through intermolecular Ullmann coupling and cyclodehydrogenation reaction to form COFs primarily constituted by dimer building blocks. Combining scanning tunneling microscopy/spectroscopy and density functional theory calculations, we have precisely confirmed the structural evolution and reaction mechanism. Furthermore, by introducing Ag adatoms to form C−Ag−C intermediates, we have successfully regulated the reaction path and synthesized one‐dimensional nanoribbons with dimers as building blocks. This work not only validates the strategy of synthesizing dimeric nanostructures on different surfaces through cascade reactions induced by precursor design, but also enriches the research field of surface synthesis of COFs and nanoribbons.

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A Cascade Reaction Triggered by H‐H Steric Hindrance: Dimeric Covalent Organic Frameworks on Au(111) and Dimeric Nanoribbons on Ag(111)

Fu,

Lu,

Geng

et al. 2024

Chin. J. Chem.

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Tilted Spins in Chains of Molecular Switches on Pb(100)

Treichel,

Möller,

Meng

et al. 2024

ACS Nano

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A complex based on a Ni(II) porphyrin exhibiting spin crossover on Ag(111) is studied on Pb(100) by scanning tunneling microscopy at 0.3 K. Strong molecular interactions between the phenyl and pentafluorophenyl moieties lead to the formation of molecular chains and cause a faceting of the substrate surface. The chains are located along double and multiple substrate steps that deviate from high-symmetry directions. Tunneling spectroscopy reveals spin-flip excitations of an S = 1 system. Measurements in high magnetic fields are used to identify a tilt of the complex and its hard anisotropy axis with respect to the surface normal. Electron injection into the substrate near the molecular rows induces a transition to a state with larger inelastic cross section, leaving the spin state unchanged.

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Surface and interfacial sciences for future technologies

Zhou,

Shen,

Wang

et al. 2024

National Science Review

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Materials science has undergone an evolutional transition in research focus from solid bulks to surfaces, culminating in numerous prominent achievements. Currently, it is experiencing a new exploratory phase - interfacial science. Many a technology with a tremendous impact is closely associated with a functional interface which delineates the boundary between disparate materials or phases, evokes complexities that surpass its pristine comprising surfaces, and thereby unveils a plethora of distinctive properties. Such an interface may generate completely new or significantly enhanced properties. These specific properties are closely related to the interfacial states formed at the interfaces. Therefore, establishing a quantitative relationship between the interfacial states and their functionalities has become a key scientific issue in interfacial science. However, interfacial science also faces several challenges such as invisibility in characterization, inaccuracy in calculation and difficulty in precise construction. To tackle these challenges, people must develop new strategies for precise detection, accurate computation, and meticulous construction of functional interfaces. Such strategies are anticipated to provide a comprehensive toolbox tailored for future interfacial science explorations and thereby lay a solid scientific foundation for several key future technologies.

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Recent progress on surface chemistry I: Assembly and reaction

Cited by 3 publications

References 484 publications

A Cascade Reaction Triggered by H‐H Steric Hindrance: Dimeric Covalent Organic Frameworks on Au(111) and Dimeric Nanoribbons on Ag(111)

A Cascade Reaction Triggered by H‐H Steric Hindrance: Dimeric Covalent Organic Frameworks on Au(111) and Dimeric Nanoribbons on Ag(111)

Tilted Spins in Chains of Molecular Switches on Pb(100)

Surface and interfacial sciences for future technologies

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