Theoretical Study of the Light-Induced Spin Crossover Mechanism in [Fe(mtz)(6)](2+) and [Fe(phen)(3)](2+)

Carmen Sousa*, Coen de Graaf, Andrii Rudavskyi, Ria Broer

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)

Abstract

The deactivation pathway of the light-induced spin crossover process in two Fe(II) complexes has been studied by combining density functional theory calculations for the geometries and the normal vibrational modes and highly correlated wave function methods for the energies and spin orbit coupling effects. For the two systems considered, the mechanism of the photoinduced conversion from the low-spin singlet to the high-spin quintet state implies two intersystem crossings through intermediate triplet states. However, for the [Fe(mtz)(6)](2+) complex, the process occurs within few picoseconds and involves uniquely metal-centered electronic states, whereas for the [Fe(phen)(3)](2+) system the deactivation channel involves both metal to ligand charge transfer and metal-centered states and takes place in a femtosecond time scale.

Original languageEnglish
Pages (from-to)9720-9727
Number of pages8
JournalJournal of Physical Chemistry A
Volume121
Issue number51
DOIs
Publication statusPublished - 28-Dec-2017

Keywords

  • TRANSIENT ABSORPTION-SPECTROSCOPY
  • ISOLATED IRON(II) COMPLEX
  • DENSITY-FUNCTIONAL THEORY
  • PERTURBATION-THEORY
  • LIGAND-FIELD
  • BASIS-SETS
  • STATE
  • TRANSITION
  • RELAXATION
  • PHOTOPHYSICS

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