From Solution to Surface: Persistence of the Diradical Character of a Diindenoanthracene Derivative on a Metallic Substrate
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866910855246905344 |
|---|---|
| author | Hieulle, Jeremy Fernandez, Carlos Garcia Friedrich, Niklas Vegliante, Alessio Sanz, Sofia Sanchez-Portal, Daniel Haley, Michael M. Casado, Juan Frederiksen, Thomas Pascual, Jose Ignacio |
| author_facet | Hieulle, Jeremy Fernandez, Carlos Garcia Friedrich, Niklas Vegliante, Alessio Sanz, Sofia Sanchez-Portal, Daniel Haley, Michael M. Casado, Juan Frederiksen, Thomas Pascual, Jose Ignacio |
| contents | Organic diradicals are envisioned as elementary building blocks for designing a new generation of spintronic devices and have been used in constructing prototypical field effect transistors and non-linear optical devices. Open-shell systems, however, are also reactive, thus requiring design strategies to protect their radical character from the environment, especially when they are embedded into solid-state devices. Here, we report the persistence on a metallic surface of the diradical character of a diindeno[b,i]anthracene (DIAn) core protected by bulky end-groups. Our scanning tunneling spectroscopy measurements on single-molecules detected singlet-triplet excitations that were absent for DIAn species packed in assembled structures. Density functional theory simulations unravel that molecular geometry on the metal substrate can crucially modify the value of the single-triplet gap via the delocalization of the radical sites. The persistence of the diradical character over metallic substrates is a promising finding for integrating radical-based materials in functional devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_07285 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | From Solution to Surface: Persistence of the Diradical Character of a Diindenoanthracene Derivative on a Metallic Substrate Hieulle, Jeremy Fernandez, Carlos Garcia Friedrich, Niklas Vegliante, Alessio Sanz, Sofia Sanchez-Portal, Daniel Haley, Michael M. Casado, Juan Frederiksen, Thomas Pascual, Jose Ignacio Materials Science Atomic and Molecular Clusters Organic diradicals are envisioned as elementary building blocks for designing a new generation of spintronic devices and have been used in constructing prototypical field effect transistors and non-linear optical devices. Open-shell systems, however, are also reactive, thus requiring design strategies to protect their radical character from the environment, especially when they are embedded into solid-state devices. Here, we report the persistence on a metallic surface of the diradical character of a diindeno[b,i]anthracene (DIAn) core protected by bulky end-groups. Our scanning tunneling spectroscopy measurements on single-molecules detected singlet-triplet excitations that were absent for DIAn species packed in assembled structures. Density functional theory simulations unravel that molecular geometry on the metal substrate can crucially modify the value of the single-triplet gap via the delocalization of the radical sites. The persistence of the diradical character over metallic substrates is a promising finding for integrating radical-based materials in functional devices. |
| title | From Solution to Surface: Persistence of the Diradical Character of a Diindenoanthracene Derivative on a Metallic Substrate |
| topic | Materials Science Atomic and Molecular Clusters |
| url | https://arxiv.org/abs/2501.07285 |