Femtosecond spin-state switching dynamics of spin-crossover molecules condensed in thin films
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| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
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2023
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| author | Kämmerer, Lea Kämmerer, Gérald Gruber, Manuel Grunwald, Jan Lojewski, Tobias Mercadier, Laurent Guyader, Loïc Le Carley, Robert Carinan, Cammille Gerasimova, Natalia Hickin, David Van Kuiken, Benjamin E. Mercurio, Giuseppe Teichmann, Martin Kuppusamy, Senthil Kumar Scherz, Andreas Ruben, Mario Sokolowski-Tinten, Klaus Eschenlohr, Andrea Ollefs, Katharina Schmitz-Antoniak, Carolin Tuczek, Felix Kratzer, Peter Bovensiepen, Uwe Wende, Heiko |
| author_facet | Kämmerer, Lea Kämmerer, Gérald Gruber, Manuel Grunwald, Jan Lojewski, Tobias Mercadier, Laurent Guyader, Loïc Le Carley, Robert Carinan, Cammille Gerasimova, Natalia Hickin, David Van Kuiken, Benjamin E. Mercurio, Giuseppe Teichmann, Martin Kuppusamy, Senthil Kumar Scherz, Andreas Ruben, Mario Sokolowski-Tinten, Klaus Eschenlohr, Andrea Ollefs, Katharina Schmitz-Antoniak, Carolin Tuczek, Felix Kratzer, Peter Bovensiepen, Uwe Wende, Heiko |
| contents | The photoinduced switching of Fe(II)-based spin-crossover complexes from singlet to quintet takes place at ultrafast time scales. This a priori spin-forbidden transition triggered numerous time-resolved experiments of solvated samples to elucidate the mechanism at play. The involved intermediate states remain uncertain. We apply ultrafast x-ray spectroscopy in molecular films as a method sensitive to spin, electronic, and nuclear degrees of freedom. Combining the progress in molecule synthesis and film growth with the opportunities at x-ray free-electron lasers, we analyze the transient evolution of the Fe L3 fine structure at room temperature. Our measurements and calculations indicate the involvement of an Fe triplet intermediate state. The high-spin state saturates at half of the available molecules, limited by molecule-molecule interaction within the film. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_01483 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Femtosecond spin-state switching dynamics of spin-crossover molecules condensed in thin films Kämmerer, Lea Kämmerer, Gérald Gruber, Manuel Grunwald, Jan Lojewski, Tobias Mercadier, Laurent Guyader, Loïc Le Carley, Robert Carinan, Cammille Gerasimova, Natalia Hickin, David Van Kuiken, Benjamin E. Mercurio, Giuseppe Teichmann, Martin Kuppusamy, Senthil Kumar Scherz, Andreas Ruben, Mario Sokolowski-Tinten, Klaus Eschenlohr, Andrea Ollefs, Katharina Schmitz-Antoniak, Carolin Tuczek, Felix Kratzer, Peter Bovensiepen, Uwe Wende, Heiko Mesoscale and Nanoscale Physics Materials Science Chemical Physics The photoinduced switching of Fe(II)-based spin-crossover complexes from singlet to quintet takes place at ultrafast time scales. This a priori spin-forbidden transition triggered numerous time-resolved experiments of solvated samples to elucidate the mechanism at play. The involved intermediate states remain uncertain. We apply ultrafast x-ray spectroscopy in molecular films as a method sensitive to spin, electronic, and nuclear degrees of freedom. Combining the progress in molecule synthesis and film growth with the opportunities at x-ray free-electron lasers, we analyze the transient evolution of the Fe L3 fine structure at room temperature. Our measurements and calculations indicate the involvement of an Fe triplet intermediate state. The high-spin state saturates at half of the available molecules, limited by molecule-molecule interaction within the film. |
| title | Femtosecond spin-state switching dynamics of spin-crossover molecules condensed in thin films |
| topic | Mesoscale and Nanoscale Physics Materials Science Chemical Physics |
| url | https://arxiv.org/abs/2312.01483 |