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

Hongfeng Wang; Chiara Sinito; Abdellah Kaiba; José Sanchez Costa; Cédric Desplanches; Philippe Dagault; Philippe Guionneau; Jean François Létard; Philippe Negrier; Denise Mondieig

doi:10.1002/ejic.201402666

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

Hongfeng Wang, Chiara Sinito, Abdellah Kaiba, José Sanchez Costa, Cédric Desplanches, Philippe Dagault, Philippe Guionneau, Jean François Létard, Philippe Negrier, Denise Mondieig

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	4927-4933
Number of pages	7
Journal	European Journal of Inorganic Chemistry
Volume	2014
Issue number	29
DOIs	https://doi.org/10.1002/ejic.201402666
State	Published - 1 Oct 2014
Externally published	Yes

Keywords

Dehydration
Iron
Magnetic properties
Phase transitions
Solvent effects
Spin crossover

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title = "Unusual solvent dependence of a molecule-based feii macrocyclic spin-crossover complex",

abstract = "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.",

keywords = "Dehydration, Iron, Magnetic properties, Phase transitions, Solvent effects, Spin crossover",

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doi = "10.1002/ejic.201402666",

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T1 - Unusual solvent dependence of a molecule-based feii macrocyclic spin-crossover complex

AU - Wang, Hongfeng

AU - Sinito, Chiara

AU - Kaiba, Abdellah

AU - Costa, José Sanchez

AU - Desplanches, Cédric

AU - Dagault, Philippe

AU - Guionneau, Philippe

AU - Létard, Jean François

AU - Negrier, Philippe

AU - Mondieig, Denise

PY - 2014/10/1

Y1 - 2014/10/1

N2 - 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.

AB - 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.

KW - Dehydration

KW - Iron

KW - Magnetic properties

KW - Phase transitions

KW - Solvent effects

KW - Spin crossover

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DO - 10.1002/ejic.201402666

M3 - Article

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SN - 1434-1948

VL - 2014

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JO - European Journal of Inorganic Chemistry

JF - European Journal of Inorganic Chemistry

IS - 29

ER -

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

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Keywords

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