Lanthanoid Single-Ion Magnets Based on Polyoxometalates with a 5-fold Symmetry: The Series [LnP5W30O110]12– (Ln3+ = Tb, Dy, Ho, Er, Tm, and Yb)
Journal of the American Chemical Society2012Vol. 134(36), pp. 14982–14990
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Salvador Cardona‐Serra, J.M. Clemente-Juan, Eugenio Coronado, Alejandro Gaita‐Ariño, Agustín Camón, Marco Evangelisti, Fernando Luis, M.J. Pérez, J. Sesé
Abstract
A robust, stable and processable family of mononuclear lanthanoid complexes based on polyoxometalates (POMs) that exhibit single-molecule magnetic behavior is described here. Preyssler polyanions of general formula [LnP(5)W(30)O(110)](12-) (Ln(3+) = Tb, Dy, Ho, Er, Tm, and Yb) have been characterized with static and dynamic magnetic measurements and heat capacity experiments. For the Dy and Ho derivatives, slow relaxation of the magnetization has been found. A simple interpretation of these properties is achieved by using crystal field theory.
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