Iron polyoxometalate single-molecule magnets.
Iron sandwich on a tungstate bun: Two new polyoxotungstates with paramagnetic iron(III) heteroatoms (see structure, W blue, Fe yellow, O red) possess S=15/2 and S=5 ground states. Both compounds are single-molecule magnets, and the hexairon species shows large hysteresis (see picture) and quantum tunneling effects at low temperature. Electrochemical studies indicate that these species are stable in solution for a wide range of pH values.
Compain
Jean-Daniel
JD
Institut Lavoisier de Versailles, UMR 8180, Université de Versailles Saint-Quentin, 45 Avenue des Etats-Unis, 78035 Versailles, France.
Mialane
Pierre
P
Dolbecq
Anne
A
Mbomekallé
Israël Martyr
IM
Marrot
Jérôme
J
Sécheresse
Francis
F
Rivière
Eric
E
Rogez
Guillaume
G
Wernsdorfer
Wolfgang
W