Synthesis and characterization of [7]triangulene

Mishra S, Xu K, Eimre K, Komber H, Ma J, Pignedoli CA, Fasel R, Feng X, Ruffieux P (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Nanoscale Royal Society of Chemistry

Book Volume: 13

Pages Range: 1624-1628

Journal Issue: 3

DOI: 10.1039/d0nr08181g

Abstract

Triangulene and its p-extended homologues constitute non-Kekulé polyradical frameworks with high-spin ground states, and are anticipated to be key components of organic spintronic devices. We report a combined in-solution and on-surface synthesis of the hitherto largest triangulene homologue, [7]triangulene (C78H24), consisting of twenty-eight benzenoid rings fused in a triangular fashion. We employ low-temperature scanning tunneling microscopy to confirm the chemical structure of individual molecules adsorbed on a Cu(111) surface. While neutral [7]triangulene in the gas phase is predicted to have an open-shell septet ground state; our scanning tunneling spectroscopy measurements, in combination with density functional theory calculations, reveal chemisorption of [7]triangulene on Cu(111) together with considerable charge transfer, resulting in a closed-shell state. Furthermore, substantial hybridization between the molecular orbitals of [7]triangulene is observed.

Involved external institutions

Eidgenössische Materialprüfungs- und Forschungsanstalt (Empa) / Swiss Federal Laboratories for Materials Science & Technology CH Switzerland (CH) Technische Universität Dresden DE Germany (DE) Leibniz-Institut für Polymerforschung Dresden e. V. DE Germany (DE)

How to cite

APA:

Mishra, S., Xu, K., Eimre, K., Komber, H., Ma, J., Pignedoli, C.A.,... Ruffieux, P. (2021). Synthesis and characterization of [7]triangulene. Nanoscale, 13(3), 1624-1628. https://doi.org/10.1039/d0nr08181g

MLA:

Mishra, Shantanu, et al. "Synthesis and characterization of [7]triangulene." Nanoscale 13.3 (2021): 1624-1628.

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