Repositori institucional URV
| Autor/s de la URV: | ECHAVARREN PABLOS, ANTONIO / Stoica, Otilia-Violeta |
| Autor segons l'article: | Zuzak, R; Kumar, M; Stoica, O; Soler-Polo, D; Brabec, J; Pernal, K; Veis, L; Blieck, R; Echavarren, AM; Jelinek, P; Godlewski, S |
| Adreça de correu electrònic de l'autor: | antoniomaria.echavarren@urv.cat |
| Identificador de l'autor: | 0000-0002-6418-7930 |
| Any de publicació de la revista: | 2024 |
| Tipus de publicació: | Journal Publications |
| Referència de l'ítem segons les normes 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 |
| Referència a l'article segons font original: | Angewandte Chemie (International Ed. Print). 63 (9): |
| Resum: | 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 |
| DOI de l'article: | 10.1002/anie.202317091 |
| Enllaç font original: | https://onlinelibrary.wiley.com/doi/10.1002/anie.202317091 |
| Versió de l'article dipositat: | info:eu-repo/semantics/submittedVersion |
| Accès a la llicència d'ús: | https://creativecommons.org/licenses/by/3.0/es/ |
| Departament: | Química Analítica i Química Orgànica |
| URL Document de llicència: | https://repositori.urv.cat/ca/proteccio-de-dades/ |
| Àrees temàtiques: | 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 |
| Paraules clau: | Photogeneration Open-shell compounds Many-body calculations Inelastic excitation Higher acenes Heptacene Energy Diradicals Acenes |
| Entitat: | Universitat Rovira i Virgili |
| Data d'alta del registre: | 2024-08-03 |
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| DocumentPrincipal | DocumentPrincipal | application/pdf |
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