Crystal structure and magnetism of two new 3d–4f complexes contain Mn(III) and Ln(III) (Ln = Dy, Tb) ions

• Two 3d-4f complexes were synthesized and structurally characterized.
• An approximate method was used to interpret the magnetic behavior.
• Different architectures can be formed by β-diketonate ligand cleaving or not.

Two new complexes, [MnIIILDyIII(hfac)2(CF3COO)(H2O)][DyIII(hfac)3(CF3COO)(H2O)]·2CHCl3 (1) and [MnIIIL(H2O)][TbIII(hfac)4]·CHCl3 (2) [L = N,N'-ethylene-bis(3-methoxy-salicylideneiminate), hfac = hexafluoroacetylacetone] were synthesized and structural characterized by X-ray single-crystal diffraction. The magnetic analysis was carried out by using the Hamiltonian of Ĥ = ΔĴz2 for lanthanide ions and Ĥ = DŜz2 for Mn(III) ion, and the best fitting gives D = ± 2.98 cm− 1, Δ = − 0.0014 cm− 1, zJ′ = − 0.017 cm− 1, gDy = 1.37, gMn = 2.02 for complex 1 and D = ± 0.23 cm− 1, Δ = 0.0034 cm− 1, gTb = 1.52, gMn = 1.99 for complex 2.

Two new 3d-4f heterometal complexes were synthesized and structurally characterized. The magnetic analysis was carried out by using the Hamiltonian of Ĥ = ΔĴz2 for lanthanide ions and the magnetic studies reveal that a weak antiferromagnetic interaction may be exist between the Dy(III) ion and Mn(III) ion in complex 1.Figure optionsDownload as PowerPoint slide