Mishra, Shantanu; Yao, Xuelin; Chen, Qiang; Eimre, Kristjan; Gröning, Oliver; Ortiz, Ricardo; Di Giovannantonio, Marco; Sancho-García, Juan Carlos; Fernández-Rossier, Joaquín; Pignedoli, Carlo A.; Müllen, Klaus; Ruffieux, Pascal; Narita, Akimitsu; Fasel, Roman (2021). Large magnetic exchange coupling in rhombus-shaped nanographenes with zigzag periphery. Nature chemistry, 13(6), pp. 581-586. Nature Publishing Group 10.1038/s41557-021-00678-2
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Postprint_Large_magnetic_exchange_coupling_in_rhombus-shaped_nanographenes_with_zigzag_periphery_Mishra_et_al.pdf - Accepted Version Available under License Publisher holds Copyright. Download (5MB) | Preview |
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21_Mishra_Nat._Chem._Large_magnetic_exchange_coupling_in_rhombus-shaped_nanographenes_with_zigzag_periphery.pdf - Published Version Restricted to registered users only Available under License Publisher holds Copyright. Download (1MB) |
Nanographenes with zigzag edges are predicted to manifest non-trivial π-magnetism resulting from the interplay of concurrent electronic effects, such as hybridization of localized frontier states and Coulomb repulsion between valence electrons. This provides a chemically tunable platform to explore quantum magnetism at the nanoscale and opens avenues towards organic spintronics. The magnetic stability in nanographenes is thus far greatly limited by the weak magnetic exchange coupling, which remains below the room-temperature thermal energy. Here, we report the synthesis of large rhombus-shaped nanographenes with zigzag peripheries on gold and copper surfaces. Single-molecule scanning probe measurements show an emergent magnetic spin singlet ground state with increasing nanographene size. The magnetic exchange coupling in the largest nanographene (C70H22, containing five benzenoid rings along each edge), determined by inelastic electron tunnelling spectroscopy, exceeds 100 meV or 1,160 K, which outclasses most inorganic nanomaterials and survives on a metal electrode.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP) |
UniBE Contributor: |
Fasel, Roman |
Subjects: |
500 Science > 530 Physics 500 Science > 540 Chemistry |
ISSN: |
1755-4330 |
Publisher: |
Nature Publishing Group |
Language: |
English |
Submitter: |
Roman Fasel |
Date Deposited: |
15 Feb 2022 10:47 |
Last Modified: |
05 Dec 2022 16:05 |
Publisher DOI: |
10.1038/s41557-021-00678-2 |
PubMed ID: |
33972756 |
BORIS DOI: |
10.48350/164867 |
URI: |
https://boris.unibe.ch/id/eprint/164867 |
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