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采用溶剂扩散方法合成了三个2,6-二甲基-3,5-二庚酮稀土配合物,即:Eu(dmh)3(bpy)(1)、Sm(dmh)3(bpy)(2)、Gd(dmh)3(bpy)(3).单晶X-射线衍射分析确认化合物1～3具有单核结构,每个晶胞中有两个晶体学不等价分子.其中心稀土离子Ln3+(Ln3+=Eu3+、Sm3+、Gd3+)采取八配位模式,其中6个配位的氧原子来自于配体2,6-二甲基-3,5-二庚酮,另外2个配位氮原子来自于辅配体2,2'-联吡啶.荧光光谱分析表明,化合物1和2发射稀土离子的特征荧光.配体到稀土离子的能量传递计算分析证实,2,6-二甲基-3,5-二庚酮以及辅配体2,2'-联吡啶可以有效地敏化Eu3+和Sm3+稀土离子.“,”Three 2,6-dimethyl-3,5-heptanedione (dmh) Sm3+,Eu3+ and Gd3+ complexes,namely,Eu (dmh)3 (bpy) (1),Sm (dmh)3 (bpy) (2) and Gd (dmh)3 (bpy) (3) were synthesized by a facile solvent diffusion method.The X-ray diffraction analysis revealed that all the complexes were of mononuclear structure,and the central Ln3+ (Ln3+ =Eu3+,Sm3+ and Gd3+) ion was eight-coordinated by six oxygen atoms furnished by three dmh ligands and two N atoms from 2,2'-bipyridine (bpy) ancillary ligand.Notably,there were two unequivalent Ln(dmh) 3 (bpy) molecules in one asymmetry unit with different coordination symmetry.The room-temperature photoluminescence (PL) spectra of complexes 1 and 2 showed strong characteristic emissions of the corresponding Eu3 + and Sm3+ ions,suggesting that dmh ligand efficiently sensitized the luminescence of Eu3+ and Sm3+ions.