席夫碱类三明治型铽/镝金属配合物的合成、表征及磁性（英文）
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摘要
以N,N′-二(4-甲氧基水杨基)邻苯二胺(H2L)为配体合成了2个新的稀土配合物[M_2L_3(H_2O)](M=Tb (1),Dy (2)),并对它们进行了红外分析、元素分析和单晶结构分析。单晶衍射结果表明,配合物1和2均为三明治型双核配合物。此外还研究了配合物1和2的磁学性质,结果表明配合物1和2都表现出反铁磁性作用和场诱导效应引起的慢弛豫行为。配合物2的有效能垒和驰豫时间分别为35.45 cm-1和2.7×10~(-10) s。
Two new sandwich-type di-lanthanide complexes [M2 L3(H2 O)](M =Tb(1), Dy(2), H2 L =N,N′-bis(4-methyloxysalicylidene)benzene-1,2-diamine) were synthesized by treating the Schiff-base ligand with M(acac)3·6 H_2O(M=Tb, Dy) and characterized by elemental analysis, IR spectra and X-ray single crystal diffraction. X-ray single crystal diffraction analysis reveals that 1 and 2 have a similar new triple-deck dinuclear sandwich structure. The magnetic measurements of complexes 1 and 2 indicated that 1 and 2 exhibit the antiferromagnetic interactions between lanthanide ions, and field-induced slow magnetic relaxation. The deduced effective energy barrier(Ueff)and relaxation time(τ0) are 35.45 cm-1 and 2.7×10~(-10) s for 2. CCDC: 1818315 1; 1818316, 2.
Two new sandwich-type di-lanthanide complexes [M2 L3(H2 O)](M =Tb(1), Dy(2), H2 L =N,N′-bis(4-methyloxysalicylidene)benzene-1,2-diamine) were synthesized by treating the Schiff-base ligand with M(acac)3·6 H_2O(M=Tb, Dy) and characterized by elemental analysis, IR spectra and X-ray single crystal diffraction. X-ray single crystal diffraction analysis reveals that 1 and 2 have a similar new triple-deck dinuclear sandwich structure. The magnetic measurements of complexes 1 and 2 indicated that 1 and 2 exhibit the antiferromagnetic interactions between lanthanide ions, and field-induced slow magnetic relaxation. The deduced effective energy barrier(Ueff)and relaxation time(τ0) are 35.45 cm-1 and 2.7×10~(-10) s for 2. CCDC: 1818315 1; 1818316, 2.
引文
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