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Article Dans Une Revue Inorganic Chemistry Année : 2014

Single-Molecule-Magnet Behavior in Mononuclear Homoleptic Tetrahedral Uranium (III) Complexes

Résumé

The magnetic properties of the two uranium coordination compounds, [K(18c6)][U(OSi(OtBu)3)4] and [K(18c6)][U(N(SiMe3)2)4], both presenting the UIII ion in similar pseudotetrahedral coordination environments but with different O- or N-donor ligands, have been measured. The static magnetic susceptibility measurements and density functional theory studies suggest the presence of different ligand fields in the two compounds. Alternating-current susceptibility studies conducted at frequencies ranging from 95 to 9995 Hz and at temperatures in the 1.7–10 K range revealed for both compounds slow magnetic relaxation already at zero static magnetic field with similar energy barriers U ∼24 K.

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Chimie
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Dates et versions

hal-01877479 , version 1 (19-09-2018)

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Citer

Laura Cj Pereira, Clément Camp, Joana T Coutinho, Lucile Chatelain, Pascale Maldivi, et al.. Single-Molecule-Magnet Behavior in Mononuclear Homoleptic Tetrahedral Uranium (III) Complexes. Inorganic Chemistry, 2014, 53 (22), pp.11809--11811. ⟨10.1021/ic501520c⟩. ⟨hal-01877479⟩
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