CLEMENTE-LEON, Miguel; CORONADO, Eugenio; LÓPEZ-JORDÀ, Maurici; DESPLANCHES, Cédric; ASTHANA, Saket; WANG, Hongfeng; LETARD, Jean-François

doi:10.1039/C1SC00015B

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CLEMENTE-LEON, Miguel
Instituto de Ciencia Molecular [ICMol]

CORONADO, Eugenio
Instituto de Ciencia Molecular [ICMol]

LÓPEZ-JORDÀ, Maurici
Instituto de Ciencia Molecular [ICMol]

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Chemical Science. 2011, vol. 2, n° 6, p. 1121-1127

The Royal Society of Chemistry

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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.< Réduire

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

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