The Syntheses,Structures And Properties Of 3d-4f Low Dimension Molecular Magnetic Materials

In this paper, we have presented the reactions of polydentate Schiff-baseligands with transition-metals and/or lanthanides ions lead to eightcompounds, the single-crystal structure analysis and the magnetic propertieshave been studied in further.Single-crystal structure analysis demonstrated that complexes 7(C₈₈H₁₂₆N₄Pr₁₀O₆₆) and 8(C₉₀H₁₃₀N₄Nd₁₀O₆₆) are isostructural, and twodifferent binding modes can be observed for the Schiff base ligand incompounds 2 (C₅₄H₈₂N₄O₃₄Cl₂Mn₄) and 5 (C₆₆H₁₂₆N₄O₅₀Cl₂Mn₄Nd₂),6(C₉₆H₁₄₈N₆O₇₀Dy₁₀),and 7 to 8 with which it chelates to metal ions. Moreinterestingly, we found the co-existence of five different coordination modesof acetate groups in complex 6, however only three in complexes 7 and 8.Magnetic measurements revealed that dominant anti-ferromagneticinteractions within all the present compounds, moreover, the magneticsusceptibilities for compounds 5 and 6 have been investigated. However, theabsence of slow relaxation of the magnetization was observed in them.