A Symmetry-Breaking Spin-State Transition in Iron(III).

Michael Griffin (1) , Stephen Shakespeare (1) , Helena Shepherd (2) , Charles J. Harding (3) , Jean-François Létard (4) , Cédric Desplanches (4) , Andrés E. Goeta (2) , Judith A. K. Howard (2) , Annie K. Powell (5) , Valeriu Mereacre (6) , Yann Garcia (7) , Anil D. Naik (7) , Helge Müller-Bunz (1) , Grace G. Morgan (1)

1 SFI-Strategic Research Cluster in Solar Energy Conversion, Centre for Synthesis and Chemical Biology
2 Department of Chemistry
3 Department of Chemistry
4 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
5 Institut für Anorganische Chemie
6 Institut of Inorganic Chemistry
7 UCL CMAT - Unité de Chimie des Matériaux Inorganiques et Organiques

A two-step magnetic spin transition with accompanying structural phase transitions is reported for the first time for Fe^III. The transitions are observed at 187 K and 90 K on cooling with a hysteretic transition recorded upon heating during the first crossover at 106 K. The intermediate phase persists over 97 K and contains an unprecedented [HS-HS-LS] motif with tripling of the unit cell

Domaines: Matériaux

Michael Griffin, Stephen Shakespeare, Helena Shepherd, Charles J. Harding, Jean-François Létard, et al.. A Symmetry-Breaking Spin-State Transition in Iron(III).. Angewandte Chemie International Edition, 2011, 50 (4), pp.896-900. ⟨10.1002/anie.201005545⟩. ⟨hal-00559541⟩