RT Journal Article
T1 On-surface synthesis and collective spin excitations of a triangulene-based nanostar
A1 Hieulle, Jeremy
A1 Castro Fernández, Silvia
A1 Friedrich, Niklas
A1 Vegliante, Alessio
A1 Romero-Lara, Francisco
A1 Sanz, Sofía
A1 Rey Vieites, Dulce María
A1 Corso, Martina
A1 Frederiksen, Thomas
A1 Pascual, Jose Ignacio
A1 Peña Gil, Diego
K1 Bond-resolved STM
K1 On-surface synthesis
K1 Open-shell
K1 Spin excitation
K1 Triangulene
AB Triangulene nanographenes are open-shell molecules with predicted high spin state due to the frustration of their conjugated network. Their long-sought synthesis became recently possible over a metal surface. Here, we present a macrocycle formed by six [3]triangulenes, which was obtained by combining the solution synthesis of a dimethylphenyl-anthracene cyclic hexamer and the on-surface cyclodehydrogenation of this precursor over a gold substrate. The resulting triangulene nanostar exhibits a collective spin state generated by the interaction of its 12 unpaired π-electrons along the conjugated lattice, corresponding to the antiferromagnetic ordering of six S=1 sites (one per triangulene unit). Inelastic electron tunneling spectroscopy resolved three spin excitations connecting the singlet ground state with triplet states. The nanostar behaves close to predictions from the Heisenberg model of an S=1 spin ring, representing a unique system to test collective spin modes in cyclic systems
PB Wiley
SN 1433-7851
YR 2021
FD 2021
LK http://hdl.handle.net/10347/29053
UL http://hdl.handle.net/10347/29053
LA eng
NO Angew. Chem. Int. Ed. 2021, 60, 25224 – 25229. https://doi.org/10.1002/anie.202108301
NO We acknowledge funding from Agencia Estatal de Investigación (PID2019-107338RB, FIS2017-83780-P, MDM-2016-0618), from the Xunta de Galicia (Centro singular de investigación de Galicia, accreditation 2019–2022, ED431G 2019/03), the Basque Government (Grant IT1255-19), the European Union H2020 program (FET Open project SPRING #863098), the European Regional Development Fund and the Basque Departamento de Educación for the PhD scholarship no. PRE_2020_2_0049 (S.S.) The authors thank D. Pérez and E. Guitián for fruitful discussions
DS Minerva
RD 27 abr 2026