以多齿席夫碱(E)-2-羟基-3-甲氧基-N'-(6-甲氧基吡啶-2-亚甲基)苯并酰肼(H₂L)为配体，与Ln(dbm)₃·6H₂O(Hdbm=二苯甲酰甲烷)反应，通过溶剂热法，成功设计并构筑了3例新的四核稀土配合物[Ln₄(dbm)₆(L)₂(μ₂-OCH₃)₂(CH₃OH)₂]·xCH₃OH[Ln=Eu (1)、Tb (2)、Tm (3)，x=3(1)、0(2)、0(3)]。单晶X射线衍射结构表明：1~3的结构相似，配位单元主要由4个Ln^Ⅲ、6个dbm^-、2个L^2-、2个μ₂-OCH₃及2个配位的CH₃OH组成。4个中心Ln^Ⅲ通过6个μ₂-O原子相互连接，呈线型四核结构。固体荧光实验测试表明：1和2在室温下表现出稀土的荧光特征发射峰。此外，抗菌活性研究表明，与配体H₂L和稀土离子相比，1~3具有更强的抗菌活性。采用紫外光谱法、循环伏安法和荧光光谱法研究了1~3与小牛胸腺DNA之间的相互作用，结果表明1~3与小牛胸腺DNA的相互作用为插入结合。

Two new binuclear Gd₂ complexes with the molecular formula [Gd₂(L)(H₂L)]·2CH₃OH·CH₃CN (1) and [Gd₂(H₂L)₂(dbm)₂]·6CH₃CN (2) (Hdbm=dibenzoylmethane) have been obtained by using a large conjugated diacylhydrazone organic ligand N′, N‴-(1E, 1′E)-(1, 10-phenanthroline-2, 9-diyl)bis(methaneylylidene) bis (2-hydroxy-benzohydrazide) (H₄L) reacting with Gd(NO₃)₃·6H₂O or Gd(dbm)₃·2H₂O. Structure studies reveal that Gd₂ complexes 1 and 2 belong to a triclinic crystal system with space group P1. Nevertheless, they show different molecule structures. 1 displays a cattail leaf fan shape, while 2 displays a pinwheel-shaped cage. Magnetic properties researches suggest that the two Gd₂ complexes displayed different magnetic refrigeration (-ΔS_m=23.35 and 15.09 J·kg^-1·K^-1 for 1 and 2, respectively). In addition, the synergistic interaction between ligand and Ln(Ⅲ) ions, promotes the two Gd₂ complexes showing excellent antibacterial activity. When the Gd₂ complexes interact with DNA, the Gd₂ complexes mainly insert or cut DNA.