A hybrid magnet with coexistence of ferromagnetism and photoinduced Fe(III) spin-crossover

被引：84

作者：

Clemente-Leon, Miguel ^{[1
]}

Coronado, Eugenio ^{[1
]}

Lopez-Jorda, Maurici ^{[1
]}

Desplanches, Cedric ^{[2
]}

Asthana, Saket ^{[2
]}

Wang, Hongfeng ^{[2
]}

Letard, Jean-Francois ^{[2
]}

机构：

[1] Univ Valencia, Inst Ciencia Mol, Paterna 46980, Spain

[2] Univ Bordeaux, CNRS, ICMCB, F-33608 Pessac, France

来源：

CHEMICAL SCIENCE | 2011年 / 2卷 / 06期

关键词：

MOLECULE-BASED MAGNETS; FE-III COMPLEX; X-RAY; IRON(III) COMPOUNDS; LINKAGE ISOMERISM; MIXED-VALENCY; OXALATE; OX; TRANSITION; MN;

D O I：

10.1039/c1sc00015b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The insertion of a [Fe(sal(2)-trien)](+) complex cation into a 2D oxalate network results in a hybrid magnet with coexistence of magnetic ordering and photoinduced spin-crossover (LIESST effect) in compound [Fe-III(sal(2)-trien)][(MnCrIII)-Cr-II(ox)(3)]center dot(CH2Cl2) (1). A complete photomagnetic characterization together with a detailed structural analysis of the low-spin (LS) and high-spin (HS) structures of 1 is presented in order to understand such unusual behavior. This very rare and unexpected property in a Fe-III spin-crossover complex, has been attributed to the strong distortion exhibited by the metastable HS state. Furthermore, 1 has shown that, in contrast to what has been previously proposed, a cooperative spin-crossover is not a necessary condition to observe LIESST effect in Fe-III compounds. The photo-induced spin conversion of the inserted Fe-III complex has shown to have a negligible influence on the cooperative magnetic behaviour of the 2D oxalate network.

引用

页码：1121 / 1127

页数：7

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