Regensburg 2025 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 68: Focus Session Molecular Nanostructures on Surfaces: On-Surface Synthesis and Single-Molecule Manipulation IV
O 68.4: Vortrag
Mittwoch, 19. März 2025, 15:45–16:00, H24
Relating Radical Delocalization, Charge Transfer and Magnetic Ground State in Open-Shell Molecules — Tao Wang1, Sergio Salaverria2, Fernando Aguilar-Galindo3, Javier Besteiro-Saez4, Luis M. Mateo4, Paula Angulo-Portugal5, Jonathan Rodriguez-Fernandez6, Dolores Perez4, Martina Corso1,5, Diego Peña4, and •Dimas G. de Oteyza1,2 — 1Donostia International Physics Center, San Sebastián, Spain — 2Nanomaterials and Nanotechnology Research Center (CINN), El Entrego, Spain — 3Universidad Autónoma de Madrid, Madrid, Spain — 4CiQUS, Santiago de Compostela, Spain — 5Centro de Fisica de Materiales, San Sebastián, Spain — 6University of Oviedo, Oviedo, Spain
At the same time as our capabilities to synthesize open-shell carbon-based materials are rapidly growing with the development of on-surface synthesis under vacuum conditions, the interest in pi-magnetism is rising due to its excellent prospects for potential applications. As a result, increasing efforts are being focused on the detailed understanding of open-shell carbon nanostructures and all the parameters that determine their spin densities and magnetic ground states. Here we present a facile route to synthesize different open-shell acene derivatives with closely related structures. A systematic comparison allows us to draw conclusions on the role of the functional groups, their number and distribution, as well as on the role of the radical state delocalization in relation with the presence or absence of charge transfer at interfaces, which consequently impacts the molecules pi-magnetism.
Keywords: Carbon nanostructures; pi-magnetism; open-shell; charge transfer; on-surface synthesis