ReF6]2-: A Robust Module for the Design of Molecule-Based Magnetic Materials.

Kasper S. Pedersen (1, 2) , Marc Sigrist (1, 3) , Mikkel A. Sørensen (1) , Anne-Laure Barra (4) , Thomas Weyhermüller (5) , Stergios Piligkos (1) , Christian Aa. Thuesen (1) , Morten G. Vinum (1) , Hannu Mutka (3) , Høgni Weihe (1) , Rodolphe Clérac (2) , Jesper Bendix (1)

1 Department of Chemistry [Copenhagen]
2 CRPP - Centre de recherches Paul Pascal
3 ILL - Institut Laue-Langevin
4 LNCMI-G - Laboratoire national des champs magnétiques intenses - Grenoble
5 Max Planck Institute for Chemical Energy Conversion

A facile synthesis of the [ReF6]2! ion and its use as a building block to synthesize magnetic systems are reported. Using dc and ac magnetic susceptibility measurements, INS and EPR spectroscopies, the magnetic properties of the isolated [ReF6]2! unit in (PPh4)2[ReF6]*2H2O (1) have been fully studied including the slow relaxation of the magnetization observed below ca. 4 K. This slow dynamic is preserved for the one-dimensional coordination polymer [Zn(viz)4(ReF6)] 1(2,viz=1-vinylimidazole), demonstrating the irrelevance of low symmetry for such magnetization dynamics in systems with easy-plane-type anisotropy....

Mots clés: Coordination polymers; Fluoride; Magnetic anisotropy; Rhenium; Single-molecule magnets

Domaines: Chimie de coordination; Matériaux

Kasper S. Pedersen, Marc Sigrist, Mikkel A. Sørensen, Anne-Laure Barra, Thomas Weyhermüller, et al.. ReF6]2-: A Robust Module for the Design of Molecule-Based Magnetic Materials.. Angewandte Chemie International Edition, 2014, 53, pp. 1351-1354. ⟨10.1002/anie.201309981⟩. ⟨hal-00938087⟩