Collective All‐Carbon Magnetism in Triangulene Dimers

Mishra, Shantanu; Beyer, Doreen; Eimre, Kristjan; Ortiz, Ricardo; Fernández‐Rossier, Joaquín; Berger, Reinhard; Gröning, Oliver; Pignedoli, Carlo A.; Fasel, Roman; Feng, Xinliang; Ruffieux, Pascal (2020). Collective All‐Carbon Magnetism in Triangulene Dimers. Angewandte Chemie (International ed.), 59(29), pp. 12041-12047. Wiley-VCH 10.1002/anie.202002687

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Triangular zigzag nanographenes, such as triangulene and its π‐extended homologues, have received widespread attention as organic nanomagnets for molecular spintronics, and may serve as building blocks for high‐spin networks with long‐range magnetic order—of immense fundamental and technological relevance. As a first step toward these lines, we present the on‐surface synthesis and a proof‐of‐principle experimental study of magnetism in covalently bonded triangulene dimers. On‐surface reactions of rationally designed precursor molecules on Au(111) lead to the selective formation of triangulene dimers in which the triangulene units are either directly connected through their minority sublattice atoms, or are separated via a 1,4‐phenylene spacer. The chemical structures of the dimers have been characterized by bond‐resolved scanning tunneling microscopy. Scanning tunneling spectroscopy and inelastic electron tunneling spectroscopy measurements reveal collective singlet‐triplet spin excitations in the dimers, demonstrating efficient inter‐triangulene magnetic coupling.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Departement of Chemistry and Biochemistry

UniBE Contributor:

Fasel, Roman

Subjects:

500 Science > 530 Physics
500 Science > 540 Chemistry

ISSN:

1433-7851

Publisher:

Wiley-VCH

Language:

English

Submitter:

Roman Fasel

Date Deposited:

03 Sep 2020 14:41

Last Modified:

03 Sep 2020 14:49

Publisher DOI:

10.1002/anie.202002687

BORIS DOI:

10.7892/boris.146326

URI:

https://boris.unibe.ch/id/eprint/146326

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