On-surface synthesis and characterization of [7]triangulene quantum ring

0541655 - FZÚ 2022 RIV US eng J - Journal Article
Su, J. - Fan, W. - Mutombo, Pingo - Peng, X. - Song, S.T. - Ondráček, Martin - Golub, Pavlo - Brabec, Jiří - Veis, Libor - Telychko, M. - Jelínek, Pavel - Wu, J. - Lu, J.
On-surface synthesis and characterization of [7]triangulene quantum ring.
Nano Letters. Roč. 21, č. 1 (2021), s. 861-867. ISSN 1530-6984. E-ISSN 1530-6992
R&D Projects: GA ČR(CZ) GJ18-18940Y
Grant - others:AV ČR(CZ) AP1601
Program: Akademická prémie - Praemium Academiae
Institutional support: RVO:68378271 ; RVO:61388955
Keywords : nc-AFM * DFT * DMRG * on-surface chemistry
OECD category: Condensed matter physics (including formerly solid state physics, supercond.); Physical chemistry (UFCH-W)
Impact factor: 12.262, year: 2021
Method of publishing: Limited access
https://doi.org/10.1021/acs.nanolett.0c04627

Herein, we report the synthesis of an open-shell [7]triangulene quantum ring ([7]TQR) molecule on Au(111) through the surface-assisted cyclodehydrogenation of a rationally designed kekulene derivative. Bond-resolved scanning tunneling microscopy (BR-STM) unambiguously imaged the molecular backbone of a single [7]TQR with a triangular zigzag edge topology, which can be viewed as [7]triangulene decorated with a coronene-like antidot in the center. Additionally, dI/dV mapping reveals that both inner and outer zigzag edges contribute to the edge-localized and spin-polarized electronic states of [7]TQR. Both experimental results and spin-polarized density functional theory calculations indicate that [7]TQR retains its open-shell septuple ground state (S = 3) on Au(111). This work demonstrates a new route for the design of high-spin graphene quantum rings for future quantum devices.
Permanent Link: http://hdl.handle.net/11104/0319189