Transient absorption spectroscopy of the iron(II) [Fe(phen)<sub>3</sub>]<sup>2+</sup> complex: Study of the non-radiative relaxation of an isolated iron(II) complex - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Chemical Physics Letters Année : 2011

Transient absorption spectroscopy of the iron(II) [Fe(phen)3]2+ complex: Study of the non-radiative relaxation of an isolated iron(II) complex

Résumé

We report on the light induced spin crossover dynamics of [Fe(phen)3] (BF4)2 (phen = 1,10-phenantroline) complex dissolved in acetonitrile. This complex was excited by picosecond and femtosecond laser pulses whose central frequency was centered on the 1A11MLCT optical transition. Our analysis that well reproduces the recorded transient absorptions suggests this complex relaxes following inter-system crossing cascade: 1MLCT(S = 0) → 3MLCT(S = 1) → 5T2(S = 2) → 1A1(S = 0). The 3MLCT and 5T2 states were identified, thanks to the triplet-triplet 3MLCT → 3MLCT and 5T25MLCT optical transitions. Our experiments well agree with the relaxation mechanism recently proposed and clearly indicate the impact of the solvent on the measured relaxation constant time.

Domaines

Matériaux

Dates et versions

hal-00622239 , version 1 (12-09-2011)

Identifiants

Citer

J. Tribollet, Geoffrey Galle, Gediminas Jonusauskas, D. Deldicque, Marc Tondusson, et al.. Transient absorption spectroscopy of the iron(II) [Fe(phen)3]2+ complex: Study of the non-radiative relaxation of an isolated iron(II) complex. Chemical Physics Letters, 2011, 513 (1-3), pp.42-47. ⟨10.1016/j.cplett.2011.07.048⟩. ⟨hal-00622239⟩
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