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Your search keyword '"Wang, Yongfeng"' showing total 14 results
Start Over Author "Wang, Yongfeng" Journal journal of the american chemical society
14 results on '"Wang, Yongfeng"'

2. Assembling Surface Molecular Sierpiński Triangle Fractals via K+-Invoked Electrostatic Interaction

Author

Dai, Jingxin, Zhao, Xinwei, Peng, Zhantao, Li, Jie, Lin, Yuxuan, Wen, Xiaojie, Xing, Lingbo, Zhao, Wenhui, Shang, Jian, Wang, Yongfeng, Liu, Jing, and Wu, Kai

Abstract

Molecular Sierpiński triangles (STs), a family of elegant and well-known fractals, can be prepared on surfaces with atomic precision. Up to date, several kinds of intermolecular interactions such as hydrogen bond, halogen bond, coordination, and even covalent bond have been employed to construct molecular STs on metal surfaces. Herein a series of defect-free molecular STs have been fabricated via electrostatic attraction between potassium cations and electronically polarized chlorine atoms in 4,4″-dichloro-1,1′:3′,1″-terphenyl (DCTP) molecules on Cu(111) and Ag(111). The electrostatic interaction is confirmed both experimentally by scanning tunneling microscopy and theoretically by density functional theory calculations. These findings illustrate that electrostatic interaction can serve as an efficient driving force to construct molecular fractals, which enriches our toolbox for the bottom-up fabrication of complex functional supramolecular nanostructures.

Published
2023
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5. Molecular nanocrystals on ultrathin NaCl films on Au(111)

Author

Wang, Yongfeng, Kroger, Jorg, Berndt, Richard, and Hao Tang

Subjects
Adsorption -- Analysis, Gold -- Chemical properties, Chemistry
Abstract

Adsorption of SnPc on Au(111) partially covered with NaCl was used to directly compare SnPc growth on a metal and a nearly insulating surface. The intermolecular interactions is found to dominate over the molecule-NaCl coupling and resulted in a tilted adsorption configuration.

Published
2010

6. Construction of Sierpiński Triangles up to the Fifth Order

Author

Li, Chao, primary, Zhang, Xue, additional, Li, Na, additional, Wang, Yawei, additional, Yang, Jiajia, additional, Gu, Gaochen, additional, Zhang, Yajie, additional, Hou, Shimin, additional, Peng, Lianmao, additional, Wu, Kai, additional, Nieckarz, Damian, additional, Szabelski, Paweł, additional, Tang, Hao, additional, and Wang, Yongfeng, additional

Published
2017
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13. Assembling Surface Molecular Sierpiński Triangle Fractals via K + -Invoked Electrostatic Interaction.

Author

Dai J, Zhao X, Peng Z, Li J, Lin Y, Wen X, Xing L, Zhao W, Shang J, Wang Y, Liu J, and Wu K

Abstract

Molecular Sierpiński triangles (STs), a family of elegant and well-known fractals, can be prepared on surfaces with atomic precision. Up to date, several kinds of intermolecular interactions such as hydrogen bond, halogen bond, coordination, and even covalent bond have been employed to construct molecular STs on metal surfaces. Herein a series of defect-free molecular STs have been fabricated via electrostatic attraction between potassium cations and electronically polarized chlorine atoms in 4,4″-dichloro-1,1':3',1″-terphenyl (DCTP) molecules on Cu(111) and Ag(111). The electrostatic interaction is confirmed both experimentally by scanning tunneling microscopy and theoretically by density functional theory calculations. These findings illustrate that electrostatic interaction can serve as an efficient driving force to construct molecular fractals, which enriches our toolbox for the bottom-up fabrication of complex functional supramolecular nanostructures.

Published
2023
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14. Transition-metal-free synthesis of alternating thiophene-perfluoroarene copolymers.

Author

Wang Y and Watson MD

Abstract

The fluoride-activated coupling between silyl-functionalized thiophene monomers and perfluoroarenes leads to moderately high-molecular-weight alternating copolymers in excellent yields and high chemical purity. The method bypasses transition-metal catalysis and the associated need for perfluoroarenes carrying additional functional "handles". Small-molecule model studies provide insight into the relative reactivities of functional groups in this synthetic pathway.

Published
2006
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