Repositori institucional URV
| URV's Author/s: | ECHAVARREN PABLOS, ANTONIO / Stoica, Otilia-Violeta |
| Author, as appears in the article.: | Zuzak, R; Kumar, M; Stoica, O; Soler-Polo, D; Brabec, J; Pernal, K; Veis, L; Blieck, R; Echavarren, AM; Jelinek, P; Godlewski, S |
| Author's mail: | antoniomaria.echavarren@urv.cat |
| Author identifier: | 0000-0002-6418-7930 |
| Journal publication year: | 2024 |
| Publication Type: | Journal Publications |
| APA: | Zuzak, R; Kumar, M; Stoica, O; Soler-Polo, D; Brabec, J; Pernal, K; Veis, L; Blieck, R; Echavarren, AM; Jelinek, P; Godlewski, S (2024). On-Surface Synthesis and Determination of the Open-Shell Singlet Ground State of Tridecacene. Angewandte Chemie (International Ed. Print), 63(9), -. DOI: 10.1002/anie.202317091 |
| Papper original source: | Angewandte Chemie (International Ed. Print). 63 (9): |
| Abstract: | The character of the electronic structure of acenes has been the subject of longstanding discussion. However, convincing experimental evidence of their open-shell character has so far been missing. Here, we present the on-surface synthesis of tridecacene molecules by thermal annealing of octahydrotridecacene on a Au(111) surface. We characterized the electronic structure of the tridecacene by scanning probe microscopy, which reveals the presence of an inelastic signal at 126 meV. We attribute the inelastic signal to spin excitation from the singlet diradical ground state to the triplet excited state. To rationalize the experimental findings, we carried out many-body ab initio calculations as well as model Hamiltonians to take into account the effect of the metallic substrate. Moreover, we provide a detailed analysis of how the dynamic electron correlation and virtual charge fluctuation between the molecule and metallic surface reduces the singlet-triplet band gap. Thus, this work provides the first experimental confirmation of the magnetic character of tridecacene. Tridecacenes were synthesized on Au(111) and their properties were characterized by combined scanning tunneling spectroscopy, inelastic electron tunneling spectroscopy, and state-of-the-art many body calculations. The study confirmed the open-shell diradical character and demonstrated that the magnitude of the singlet-triplet band gap is affected by the proximity of the surface as well as a dynamic electron correlation.**+image |
| Article's DOI: | 10.1002/anie.202317091 |
| Link to the original source: | https://onlinelibrary.wiley.com/doi/10.1002/anie.202317091 |
| Papper version: | info:eu-repo/semantics/submittedVersion |
| licence for use: | https://creativecommons.org/licenses/by/3.0/es/ |
| Department: | Química Analítica i Química Orgànica |
| Licence document URL: | https://repositori.urv.cat/ca/proteccio-de-dades/ |
| Thematic Areas: | Química Medicina ii Medicina i Materiais Interdisciplinar General medicine General chemistry Farmacia Engenharias ii Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Chemistry, multidisciplinary Chemistry (miscellaneous) Chemistry (all) Chemistry Catalysis Astronomia / física |
| Keywords: | Photogeneration Open-shell compounds Many-body calculations Inelastic excitation Higher acenes Heptacene Energy Diradicals Acenes |
| Entity: | Universitat Rovira i Virgili |
| Record's date: | 2024-08-03 |
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