The rare earth?transition metal complex [LaCu₆（OH）₃（ClO₄）₃（Gly）₆（Im）₆]（ClO₄）₂·3（MeOH） （Gly = glycine，Im = imidazole） has been synthesized by evaporation method.The complex crystallizes in the trigonal crystal system with the R3 space group，a=1.591 99（12） nm，b=1.591 99（12） nm，c=2.354 20（2） nm，α=β=90°，γ=120°.The coordination units of the complexes are extended into three?dimensional structures via various forms of hydrogen bonding.The properties of the complex were characterized by infrared analysis，thermogravimetric analysis，fluorescence analysis and magnetic analysis.The results showed that the weight loss process of the complex is roughly divided into three steps，and the complex shows great thermal stability.Three characteristic peaks were found in fluorescence emission spectrum of the complex，which indicates that the complex exhibits weak fluorescence.There is antiferromagnetic interaction between metal ions in the complex.

Rare earth complexes of Eu³⁺ and Nd³⁺ with pyridine dicarboxylate [Ln(2,6?dipic)(2,6?Hdipic)(H₂O)₂]?4H₂O (Ln: Eu, Nd) were synthesized by hydrothermal method. The structure, magnetism and thermodynamic properties of the complexes were studied by the means of single crystal X?ray diffraction measurement, magnetic test, thermogravimetric analysis and differential scanning calorimetry analysis. The results show that two complexes are isostructural crystallizing in the monoclinic system of space group P2₁/c. There are two different coordination modes for pyridine?2,6?dicarboxylic acid in the crystals. The complexes exhibit antiferromagnetism with obvious orbital coupling effect. The prepared complexes have good thermal stability.