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He Y, Li N, Castelli IE, Li R, Zhang Y, Zhang X, Li C, Wang B, Gao S, Peng L, Hou S, Shen Z, Lü JT, Wu K, Hedegård P, Wang Y. Observation of Biradical Spin Coupling through Hydrogen Bonds. PHYSICAL REVIEW LETTERS 2022; 128:236401. [PMID: 35749188 DOI: 10.1103/physrevlett.128.236401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 02/09/2022] [Accepted: 05/03/2022] [Indexed: 06/15/2023]
Abstract
Investigation of intermolecular electron spin interaction is of fundamental importance in both science and technology. Here, radical pairs of all-trans retinoic acid molecules on Au(111) are created using an ultralow temperature scanning tunneling microscope. Antiferromagnetic coupling between two radicals is identified by magnetic-field-dependent spectroscopy. The measured exchange energies are from 0.1 to 1.0 meV. The biradical spin coupling is mediated through O─H⋯O hydrogen bonds, as elucidated from analysis combining density functional theory calculation and a modern version of valence bond theory.
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Affiliation(s)
- Yang He
- Center for Carbon-Based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China
| | - Na Li
- Center for Carbon-Based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China
| | - Ivano E Castelli
- Department of Energy Conversion and Storage, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Ruoning Li
- Center for Carbon-Based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China
| | - Yajie Zhang
- Center for Carbon-Based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China
| | - Xue Zhang
- Center for Carbon-Based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China
| | - Chao Li
- Center for Carbon-Based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China
| | - Bingwu Wang
- Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Song Gao
- Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Lianmao Peng
- Center for Carbon-Based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China
| | - Shimin Hou
- Center for Carbon-Based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China
| | - Ziyong Shen
- Center for Carbon-Based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China
| | - Jing-Tao Lü
- School of Physics, Institute for Quantum Science and Engineering, and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, 430074 Wuhan, China
| | - Kai Wu
- Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Per Hedegård
- Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Yongfeng Wang
- Center for Carbon-Based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China
- Beijing Academy of Quantum Information Sciences, Beijing 100193, China
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Braïda B, Lo A, Hiberty PC. Can Aromaticity Coexist with Diradical Character? An Ab Initio Valence Bond Study of S2N2 and Related 6π-Electron Four-Membered Rings E2N2 and E42+ (E=S, Se, Te). Chemphyschem 2012; 13:811-9. [DOI: 10.1002/cphc.201100959] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Indexed: 11/05/2022]
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Shurki A, Hiberty PC, Dijkstra F, Shaik S. Aromaticity and antiaromaticity: what role do ionic configurations play in delocalization and induction of magnetic properties? J PHYS ORG CHEM 2003. [DOI: 10.1002/poc.658] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Surján PR, Mayer I, Lukovits I. Interaction of chemical bonds. II. Ab initio theory for overlap, delocalization, and dispersion interactions. PHYSICAL REVIEW. A, GENERAL PHYSICS 1985; 32:748-755. [PMID: 9896122 DOI: 10.1103/physreva.32.748] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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