6533b833fe1ef96bd129ba0a

RESEARCH PRODUCT

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

Miguel Clemente-leónEugenio CoronadoSaket AsthanaMaurici López-jordàHongfeng WangCédric DesplanchesJean-françois Létard

subject

010405 organic chemistryChemistryStereochemistry[CHIM.MATE]Chemical Sciences/Material chemistryGeneral Chemistry010402 general chemistry01 natural sciencesLIESSTOxalate0104 chemical scienceschemistry.chemical_compoundCrystallographyFerromagnetismSpin crossoverMetastabilityMagnetSpin (physics)

description

International audience; 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.

yearjournalcountryeditionlanguage
2011-01-01Chemical Science
https://doi.org/10.1039/c1sc00015b