White Light Snapshot of Non-Equilibrium High-Spin State in a Molecular Crystal
W. Kaszuba,b, E. Colleta, H. Cailleaua, M. Servola, M.-L. Boillotc, A. Tissotc and M. Lorenca
aInstitut de Physique de Rennes, UMR CNRS 6026, Université de Rennes 1, Campus Beaulieu, 35042 Rennes, France
bQuantum Electronics Laboratory, Faculty of Physics, Adam Mickiewicz University, 60-614 Poznań, Poland
cInstitut de Chimie Moleculaire et Matériaux d'Orsay, UMR CNRS 8182, Université Paris-Sud 11, 91405 Orsay, France
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The spin-crossover compound [(TPA)Fe(TCC)]PF6 was experimentally investigated using time-resolved optical pump and supercontinuum probe technique. Changes of VIS optical density at thermal equilibrium of a crystal with different high-spin/low-spin fractions are compared to changes recorded picoseconds after femtosecond laser excitation. A white light snapshot of the high-spin state at 180 K is extracted from time-resolved spectra. Our results indicate that the temperature of the electronic state affects the absorption spectra of high- and low-spin states.
DOI: 10.12693/APhysPolA.121.324
PACS numbers: 82.53.Xa, 78.47.D-, 42.70.Gi, 31.70.Ks