Single ion magnets based on lanthanoid polyoxomolybdate complexes

Abstract : Polyoxometalate (POM) chemistry has recently offered excellent examples of single ion magnets (SIMs) and molecular spin qubits. Compared with conventional coordination compounds, POMs provide rigid and highly symmetric coordination sites. However, all POM-based SIMs reported to date exhibit a very limited range of possibilities for chemical processability. We present herein two new families of POM-based SIMs which are soluble in organic solvents: [Ln(β-Mo8O26)2]5− {LnIII = Tb, Dy, Ho, Er, Tm and Yb} and the functionalised POMs [Ln{Mo5O13(OMe)4NNC6H4-p-NO2}2]3− {LnIII = Tb, Dy, Ho, Er, Yb and Nd}. In addition, these two families represent the first SIMs based on polyoxomolybdates. A magneto-structural analysis of these families is presented, which is based on an effective crystal field model, and compared with the results reported in analogous lanthanoid SIMs based on polyoxotungstates.
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José J. Baldoví, Yan Duan, Carlos Bustos, Salvador Cardona-Serra, Pierre Gouzerh, et al.. Single ion magnets based on lanthanoid polyoxomolybdate complexes. Dalton Transactions, Royal Society of Chemistry, 2016, 45 (42), pp.16653 - 16660. ⟨10.1039/C6DT02258H⟩. ⟨hal-01397208v2⟩

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