Resonance Raman study of spin-crossover [Fe(Htrz)2(trz)](BF 4)·H2O particles coated with gold

Yeny A. Tobon, Céline Etrillard, Olivier Nguyen, Jean François Létard, Vina Faramarzi, Jean François Dayen, Bernard Doudin, Dario M. Bassani, François Guillaume

Research output: Contribution to journalArticle

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Abstract

Spin-crossover (SCO) particles of the [Fe(Htrz)2(trz)](BF 4)·H2O polymeric complex were deposited on a glass slide and coated with gold. We found that normal Raman scattering is not appropriate for analysing such a material. However, the spin transition and the thermal hysteresis of the coated particles were successfully monitored by means of Raman spectroscopy using the 325 nm excitation line that is in pre-resonance with the Metal to Ligand Charge Transfer (MLCT) electronic absorption band of the low-spin state. The results obtained confirm the persistence of the spin-crossover properties of the gold coated particles. The strong enhancement of the Raman scattering using the 325 nm excitation opens interesting opportunities for monitoring the SCO of particles integrated in miniaturised devices. The spin transition and thermal hysteresis of gold-coated particles of the spin-crossover [Fe(Htrz)2(trz)] (BF4)·H 2O polymeric complex were successfully monitored by means of resonance Raman spectroscopy using the 325 nm excitation line that is in pre-resonance with the MLCT electronic absorption band of the low-spin state of the complex.

Original languageEnglish (US)
Pages (from-to)5837-5842
Number of pages6
JournalEuropean Journal of Inorganic Chemistry
Issue number35
DOIs
StatePublished - Dec 1 2012

Keywords

  • Coordination polymers
  • Gold
  • Magnetic properties
  • Raman spectroscopy
  • Spin crossover

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    Tobon, Y. A., Etrillard, C., Nguyen, O., Létard, J. F., Faramarzi, V., Dayen, J. F., Doudin, B., Bassani, D. M., & Guillaume, F. (2012). Resonance Raman study of spin-crossover [Fe(Htrz)2(trz)](BF 4)·H2O particles coated with gold. European Journal of Inorganic Chemistry, (35), 5837-5842. https://doi.org/10.1002/ejic.201200562