Unusual Solvent Dependence of a Molecule-Based FeII Macrocyclic Spin-Crossover

被引：14

作者：

Wang, Hongfeng ^{[1
,2
]}

Sinito, Chiara ^{[1
,2
]}

Kaiba, Abdellah ^{[1
,2
]}

Costa, Jose Sanchez ^{[1
,2
]}

Desplanches, Cedric ^{[1
,2
]}

Dagault, Philippe ^{[1
,2
]}

Guionneau, Philippe ^{[1
,2
]}

Letard, Jean-Francois ^{[1
,2
]}

Negrier, Philippe ^{[3
,4
]}

Mondieig, Denise ^{[3
,4
]}

机构：

[1] CNRS, ICMCB, UPR 9048, F-33600 Pessac, France

[2] Univ Bordeaux, ICMCB, UPR9048, F-33600 Pessac, France

[3] Univ Bordeaux, LOMA, UMR 5798, F-33400 Talence, France

[4] CNRS, LOMA, UMR 5798, F-33400 Talence, France

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2014年 / 29期

关键词：

Iron; Magnetic properties; Spin crossover; Phase transitions; Solvent effects; Dehydration; CRITICAL-TEMPERATURE; IRON(II) COMPOUNDS; TRANSITION; COMPLEX; LIESST; COORDINATION; RELAXATION; KINETICS; LIGANDS; QUINTET;

D O I：

10.1002/ejic.201402666

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

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]center dot 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.

引用

页码：4927 / 4933

页数：7

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