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通过柔性配体1,3-丙二胺缩邻香兰素(H2L)与和La(NO3)3.6H2O反应,合成了1个由2个H2L桥连的双核稀土配合物[La2(NO3)6(H2L)2].CH2Cl2(1),该配合物与(NH4)(PF6)继续反应生成了1个由2个NO3-离子桥连的双核配合物[La2(NO3)2(H2L)4](PF6)4.4H2O.2CH2Cl2(2),X-射线单晶衍射分析确定了2个配合物的晶体结构。配合物1和2为结构完全不同的2个双核结构,因抗衡阴离子PF6-有去阴离子的作用,配合物1中的NO3-离子被配体取代,导致配合物1的结构翻转,形成了1个新颖的双核结构2。
A novel dual-core rare-earth complex [La2 (NO3) 6 bridged by two H2Ls was synthesized by the reaction of the flexible ligand 1,3-propanediamine and o-vanillin (H2L) (H2L) 2] .CH2Cl2 (1). The complex reacts with (NH4) (PF6) to form a dinuclear complex [La2 (NO3) 2 (H2L) 4] bridged by two NO3- (PF6) 4.4H2O.2CH2Cl2 (2). X-ray single crystal diffraction analysis confirmed the crystal structure of the two complexes. Complex 1 and 2 are two completely disordered dinuclear structures. Due to the counteranion anion PF6-, the NO3- ion in complex 1 is replaced by the ligand, resulting in the inversion of the structure of complex 1, resulting in the formation of 1 A novel dual-core structure 2.