Abstract Two series of heteronuclear Zn-Ln and Cd-Ln complexes with open-chain ether Schiff base ligand (bis(5-bromine-3-methoxysalicylidene)-3-oxapentane- 1,5-diamine (H2L) and isonicotinate (IN), with composition [Zn2LnL2(OAc)(IN)](NO3)·x(CH3OH)·y(CH2Cl2) (1 Ln = Sm, x = 1, y = 0; 2 Ln = Tb, x = 0, y = 2) and {[CdLnL(IN)(OAc)(NO3)(CH3OH)]·3(CH2Cl2)}n (3 Ln = Sm; 4 Ln = Tb), have been synthesized by interfacial diffusion methods and further performed structural characterization. The structure analysis revealed that two Zn-Ln complexes are heterotrinuclear clusters and lanthanide metal ion acts as a joint bridging of two ZnL coordination units, whereas two Cd-Ln complexes are infinite one dimensional zigzag coordination polymers formed by CdLnL secondary units through asymmetric coordination bridging isonicotinate. Luminescence properties of 1–4 in the solid state and N, N-dimethylformamide (DMF) solution at room temperature were also studied. It has been found that the Sm3+ complexes 1 and 3 exhibit corresponding Sm3+ ion characteristic emission in the solid state, but the L2− ligand can’t sensitize the Tb3+ ion in complexes 2 and 4. Finally, the structures and luminescence properties of d-f heteronuclear complexes can be adjusted by selecting different transition metals such as zinc and cadmium.

中文翻译：

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用开链醚席夫碱配体构建df异核配合物：Zn(II)和Cd(II)对结构和发光性能的调节作用

还研究了室温下 1-4 的固态和 N, N-二甲基甲酰胺 (DMF) 溶液的发光特性。已经发现，Sm3+配合物1和3在固态下表现出相应的Sm3+离子特征发射，但L2−配体不能敏化配合物2和4中的Tb3+离子。最后，df异核的结构和发光特性配合物可以通过选择不同的过渡金属如锌和镉来调整。