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Gournay, L., Chaban, I., Mevellec, J.-Y., Humbert, B., Janod, E., Guerin, L., Cammarata, M., Daro, N., Chastanet, G. & Collet, E. (2022) Shifting photo-stationary light-induced excited spin state trapping equilibrium towards higher temperature by increasing light fluence. Chemical Physics Letters, 791 139395.
Added by: Richard Baschera (2022-06-02 13:20:18) Last edited by: Richard Baschera (2022-06-02 13:54:14) |
| Type de référence: Article DOI: 10.1016/j.cplett.2022.139395 Numéro d'identification (ISBN etc.): 0009-2614 Clé BibTeX: Gournay2022 Voir tous les détails bibliographiques  |
Catégories: IMN, PMN Mots-clés: LIESST, Out-of-equilibrium, Photoinduced phenomena, raman, Spin Crossover Créateurs: Cammarata, Chaban, Chastanet, Collet, Daro, Gournay, Guerin, Humbert, Janod, Mevellec Collection: Chemical Physics Letters |
Consultations : 1/246
Indice de consultation : 7% Indice de popularité : 1.75% |
| Liens URLs https://www.scienc ... /S0009261422000628 |
| Résumé |
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The Light-Induced Excited Spin-State Trapping (LIESST) process allows tuning the electronic state of spin-crossover materials from low (LS) to high spin (HS) states. The photoinduced HS state is long-lived, up to a characteristic temperature, T(LIESST), above which the system relaxes rapidly to the LS state. We study the effect of light irradiance on competing LS → HS up-conversion and HS → LS thermal relaxation on the [Fe(phen)2(NCS)2] system. Raman spectroscopy and magnetic measurements are used to investigate this phenomenon. An empiric model describes the competition between up conversion and thermal relaxation mechanisms and the stabilization of photo-stationary state towards higher temperature.
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