Organophosphonate-Bridged Polyoxometalate-Based Dysprosium(III) Single-Molecule Magnet

A novel dysprosium(III)-containing polytungstoarsenate, [{(AsW9O33)3Dy2(H2O)4W4O9(H2O)}2(NH2(CH2PO3)2)]33–, comprising two identical subunits bridged by an organophosphonate ligand shows single-molecule-magnet (SMM) behavior. Magnetic studies reveal that this complex exhibits a butterfly-shaped hysteresis loop up to 8 K, and a thermally activated energy barrier of 101(5) K reached a breakthrough among all polyoxometalate-supported...