Abstract
AbstractThis 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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