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Article Dans Une Revue European Journal of Inorganic Chemistry Année : 2014

Unusual solvent dependence of a molecule-based FeII macrocyclic spin-crossover complex

Résumé

This work illustrates in detail the reversible hydration–dehydration process of a molecule-based material, which involves a drastic change of the switchable magnetic properties of the sample. Concretely, the complex [FeL222N3O2(CN)2]·H2O exhibits a spin crossover (SCO) accompanied by a change of the coordination number. The dehydration and rehydration of this SCO complex was carried out and monitored by different methods, which include X-ray diffraction analysis. The corresponding samples display a thermal spin transition as well as a thermal quenching of the metastable high-spin state at low temperature. In particular it was observed that the rehydrated material exhibits a particularly high temperature of relaxation, T(TIESST), of the metastable high-spin state. On the other hand, it was shown that this compound exhibits a uncommon correlation between T(TIESST) and the thermal SCO, as compared with other spin-crossover compounds that do not exhibit a change in coordination number.
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Dates et versions

hal-01075363 , version 1 (08-01-2018)

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Paternité - Pas d'utilisation commerciale - Partage selon les Conditions Initiales

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Hongfeng Wang, Chiara Sinito, Abdellah Kaiba, José Sánchez Costa, Cédric Desplanches, et al.. Unusual solvent dependence of a molecule-based FeII macrocyclic spin-crossover complex . European Journal of Inorganic Chemistry, 2014, 2014 (29), pp.4927-4933. ⟨10.1002/ejic.201402666⟩. ⟨hal-01075363⟩
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