Shifting photo-stationary light-induced excited spin state trapping equilibrium towards higher temperature by increasing light fluence
Language
en
Article de revue
This item was published in
Chemical Physics Letters. 2022-03, vol. 791, p. 139395 (6 p.)
Elsevier
English Abstract
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 ...Read more >
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.Read less <
English Keywords
LIESST
Spin crossover
Photoinduced phenomena
Raman
Out-of-equilibrium
ANR Project
Transitions de phase ELECTROnique de matériaux moleculaires controllées par PHONONIQUE non-linéaire - ANR-19-CE30-0004
Trajectoires multiples vers les états excités
Trajectoires multiples vers les états excités
Origin
Hal imported