Defect-induced pi-magnetism into non-benzenoid nanographenes

0568417 - FZÚ 2023 RIV CH eng J - Článek v odborném periodiku
Biswas, K. - Yang, L. - Ma, J. - Sánchez-Grande, A. - Chen, Qifan - Lauwaet, K. - Gallego, J. M. - Miranda, R. - Écija, D. - Jelínek, Pavel - Feng, X.L. - Urgel, J. I.
Defect-induced pi-magnetism into non-benzenoid nanographenes.
Nanomaterials. Roč. 12, č. 2 (2022), č. článku 224. E-ISSN 2079-4991
Grant CEP: GA ČR(CZ) GX20-13692X; GA MŠMT LM2018110
Grant ostatní: AV ČR(CZ) AP1601
Program: Akademická prémie - Praemium Academiae
Institucionální podpora: RVO:68378271
Klíčová slova: on-surface synthesis * nanomagnetism * polycyclic aromatic hydrocarbons * nanographenes * open-shell character * STM * nc-AFM
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 5.3, rok: 2022
Způsob publikování: Open access

The synthesis of nanographenes (NGs) with open-shell ground states have recently attained increasing attention in view of their interesting physicochemical properties and great prospects in manifold applications as suitable materials within the rising field of carbon-based magnetism. A potential route to induce magnetism in NGs is the introduction of structural defects, for instance non-benzenoid rings, in their honeycomb lattice. Here, we report the on-surface synthesis of three open-shell non-benzenoid NGs (A1, A2 and A3) on the Au(111) surface. A1 and A2 contain two five- and one seven-membered rings within their benzenoid backbone, while A3 incorporates one five-membered ring. Their structures and electronic properties have been investigated by means of scanning tunneling microscopy, noncontact atomic force microscopy and scanning tunneling spectroscopy complemented with theoretical calculations. Our results provide access to open-shell NGs with a combination of non-benzenoid topologies previously precluded by conventional synthetic procedures.
Trvalý link: https://hdl.handle.net/11104/0339728