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Resonance Raman Study of Spin‐Crossover [Fe(Htrz) 2 (trz)](BF 4 )·H 2 O Particles Coated with Gold
Author(s) -
Tobon Yeny A.,
Etrillard Céline,
Nguyen Olivier,
Létard JeanFrançois,
Faramarzi Vina,
Dayen JeanFrançois,
Doudin Bernard,
Bassani Dario M.,
Guillaume François
Publication year - 2012
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201200562
Subject(s) - spin crossover , raman scattering , raman spectroscopy , analytical chemistry (journal) , materials science , resonance (particle physics) , excitation , hysteresis , chemistry , atomic physics , inorganic chemistry , optics , condensed matter physics , chromatography , physics , electrical engineering , engineering
Spin‐crossover (SCO) particles of the [Fe(Htrz) 2 (trz)](BF 4 ) · H 2 O 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.