期刊
CHEMICAL PHYSICS LETTERS
卷 791, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.cplett.2022.139395
关键词
LIESST; Spin Crossover; Photoinduced phenomena; Raman; Out-of-equilibrium
资金
- Agence Nationale de la Recherche [ANR-19-CE29-0018 MULTICROSS, ANR-19-CE30-0004 ELECTROPHONE]
- University Rennes 1
- Fondation Rennes1
- [ANR-19-CE30-0004 ELEC-TROPHONE]
The Light-Induced Excited Spin-State Trapping (LIESST) process allows for tuning the electronic state of spin crossover materials. We investigated the effect of light irradiance on the LS -> HS up-conversion and HS -> LS thermal relaxation in the [Fe(phen)(2)(NCS)(2)] system. Raman spectroscopy and magnetic measurements were used to analyze this phenomenon. An empiric model explains the competition between up conversion and thermal relaxation mechanisms.
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 & nbsp;-> 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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