Regensburg 2025 – scientific programme
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O: Fachverband Oberflächenphysik
O 68: Focus Session Molecular Nanostructures on Surfaces: On-Surface Synthesis and Single-Molecule Manipulation IV
O 68.7: Talk
Wednesday, March 19, 2025, 16:30–16:45, H24
On-surface encapsulation of azafullerene radicals: towards 2D spin networks — •Marion A. van Midden Mavrič1, Bastien Anézo1,2, Gregor Kladnik3,4, Luca Schio4, Gregor Bavdek4,5, Yuri Tanuma1,6, Ruben Canton-Vitoria7, Ioanna K. Sideri7, Nikos Tagmatarchis7, Jannis Volkmann8,9, Herman A. Wegner8,9, Andrea Goldoni10, Chris Ewels2, Alberto Morgante4,11, Luca Floreano4, Erik Zupanič1, Dean Cvetko1,3,4, and Denis Arčon1,3 — 1Jožef Stefan Institute, Ljubljana, Slovenia — 2IMN, Nantes University, France — 3FMF, University of Ljubljana, Slovenia — 4CNR-IOM, Trieste, Italy — 5PF, University of Ljubljana, Slovenia — 6CAREM, Hokkaido University, Sapporo, Japan — 7T.P.C.I., Athens, Greece — 8Center for Materials research, Giessen, Germany — 9Justus Liebig University, Giessen, Germany — 10Elettra Sincrotrone Trieste S.C.p.A., Italy — 11Phys. dept., University of Trieste, Italy
While organic radicals on surfaces are a promising platform for realizing and controlling qubits, they are usually highly reactive. Here we present on-surface encapsulation of azafullerene C59N• into [10]cycloparaphenylene ([10]CPP) nanohoops on Au(111) as an efficient strategy to form supramolecular complexes with long-term spin protection. By vacuum depositing C59N• on a pre-deposited template layer of [10]CPP, extended networks of spin 1/2 radicals in a hexagonal lattice are formed. We find compelling evidence for electronic coupling between both molecular species, show that [10]CPP protects C59N• against dimerization and inhibits coupling to the Au(111) substrate.