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Issue 6, 2011
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A hybrid magnet with coexistence of ferromagnetism and photoinduced Fe(III) spin-crossover

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Abstract

The insertion of a [Fe(sal2-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 [FeIII(sal2-trien)][MnIICrIII(ox)3]·(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 FeIII 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 FeIII compounds. The photo-induced spin conversion of the inserted FeIII complex has shown to have a negligible influence on the cooperative magnetic behaviour of the 2D oxalate network.

Graphical abstract: A hybrid magnet with coexistence of ferromagnetism and photoinduced Fe(iii) spin-crossover

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Publication details

The article was received on 11 Jan 2011, accepted on 04 Mar 2011 and first published on 05 Apr 2011


Article type: Edge Article
DOI: 10.1039/C1SC00015B
Citation: Chem. Sci., 2011,2, 1121-1127

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

    M. Clemente-León, E. Coronado, M. López-Jordà, C. Desplanches, S. Asthana, H. Wang and J. Létard, Chem. Sci., 2011, 2, 1121
    DOI: 10.1039/C1SC00015B

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