合成了1-甲基-1,4,7,10-四氮杂环十二烷(L)配体。在乙腈中培养了La(L)(CH_3CN)-(H_2O)(CF_3SO_3)_3配合物单晶,测定了其红外光谱和质子核磁共振谱。用X射线衍射方法测定了配合物的晶体结构,该晶体属于单斜晶系,P2_1/n空间群,a=0.9700(2)nm,b=1.5966(2)nm,c=1.9085(1)nm,β=104.71(3)°,V=2.8588(50)nm~3。配合物中镧为9配位,其配位多面体为扭曲的单帽四方反棱柱体。 1-Methyl-1,4,7,10-tetraazacyclododecane (L) ligand was synthesized. The single crystal of La (L) (CH_3CN) - (H_2O) (CF_3SO_3) _3 was cultured in acetonitrile, and its infrared spectrum and proton nuclear magnetic resonance spectrum were measured. The crystal structure of the complex was determined by X-ray diffraction. The crystal belongs to the monoclinic space group P2_1 / n with a = 0.9700 (2) nm and b = 1.5966 (2) nm and c = 1.9085 , β = 104.71 (3) °, V = 2.8588 (50) nm ~ 3. Lanthanum complexes with 9 coordination, the coordination polyhedron twisted single-cap square anti-prism.