Collective All‐Carbon Magnetism in Triangulene Dimers**
Abstract
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, which are of immense fundamental and technological relevance. As a first step towards 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 intertriangulene magnetic coupling.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 18, 2020
- Source ID
- 10.1002/anie.202002687
Entities
People
- Carlo A Pignedoli
- Doreen Beyer
- Joaquín Fernández‐rossier
- Kristjan Eimre
- Oliver Gröning
- Pascal Ruffieux
- Reinhard Berger
- Ricardo Ortiz
- Roman Fasel
- Shantanu Mishra
- Xinliang Feng
Organizations
- European Social Fund Plus
- National Center of Competence in Research Materials’ Revolution: Computational Design and Discovery of Novel Materials
- Office of Naval Research
- Swiss National Science Foundation
- Technische Universität Dresden
- University of Alicante
- University of Bern