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• W2330886510 endingPage "5044" @default.
• W2330886510 startingPage "5035" @default.
• W2330886510 abstract "Sequential reaction of Mn(II) and lanthanide(III) salts with a new multidentate ligand, 2,2′-(2-hydroxy-3-methoxy-5-methylbenzylazanediyl)diethanol (LH3), containing two flexible ethanolic arms, one phenolic oxygen, and a methoxy group afforded heterometallic tetranuclear complexes [Mn2Dy2(LH)4(μ-OAc)2](NO3)2·2CH3OH·3H2O (1), [Mn2Gd2(LH)4(μ-OAc)2](NO3)2·2CH3OH·3H2O (2), [Mn2Tb2(LH)4(μ-OAc)2](NO3)2·2H2O·2CH3OH·Et2O (3), and [Mn2Ho2(LH)4(μ-OAc)2]Cl2·5CH3OH (4). All of these dicationic complexes possess an arch-like structural topology containing a central MnIII–Ln–Ln–MnIII core. The two central lanthanide ions are connected via two phenolate oxygen atoms. The remaining ligand manifold assists in linking the central lanthanide ions with the peripheral Mn(III) ions. Four doubly deprotonated LH2– chelating ligands are involved in stabilizing the tetranuclear assembly. A magnetochemical analysis reveals that single-ion effects dominate the observed susceptibility data for all compounds, with comparably weak Ln···Ln and very weak Ln···Mn(III) couplings. The axial, approximately square-antiprismatic coordination environment of the Ln3+ ions in 1–4 causes pronounced zero-field splitting for Tb3+, Dy3+, and Ho3+. For 1 and 3, the onset of a slowing down of the magnetic relaxation was observed at temperatures below approximately 5 K (1) and 13 K (3) in frequency-dependent alternating current (AC) susceptibility measurements, yielding effective relaxation energy barriers of ΔE = 16.8 cm–1 (1) and 33.8 cm–1 (3)." @default.
• W2330886510 created "2016-06-24" @default.
• W2330886510 creator A5008238569 @default.
• W2330886510 creator A5025514391 @default.
• W2330886510 creator A5040767299 @default.
• W2330886510 creator A5041675767 @default.
• W2330886510 creator A5088650187 @default.
• W2330886510 date "2013-04-24" @default.
• W2330886510 modified "2023-10-17" @default.
• W2330886510 title "Synthesis, Structure, and Magnetic Properties of a New Family of Tetra-nuclear {Mn₂^IIILn₂}(Ln = Dy, Gd, Tb, Ho) Clusters With an Arch-Type Topology: Single-Molecule Magnetism Behavior in the Dysprosium and Terbium Analogues" @default.
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