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以氯化钐与β-萘甲酰三氟丙酮(TFNB)和2,2’-联吡啶(bpy)反应,合成了钐及掺杂钐配合物。经C、H、N元素分析和稀土络合滴定及差热-热重分析,推测配合物的组成分别为Sm(TFNB)3bpy.H2O和Sm0.5RE0.5(TFNB)3bpy.H2O(RE3+=Y3+、La3+、Gd3+),配合物在500℃以下稳定。摩尔电导率表明,所有配合物均为非电解质。红外光谱及核磁共振氢谱表明,TFNB通过烯醇式氧负离子与稀土离子螯合配位,bpy的两个氮原子也与稀土离子的配位成键。荧光光谱和荧光寿命测定表明,该类配合物激发波长接近可见光,均可发出钐的特征荧光,荧光寿命也比较长,Y3+、La3+、Gd3+对Sm3+的敏化作用不强。
Samarium and doped samarium complexes were synthesized by the reaction of samarium chloride with β-naphthoyl trifluoroacetone (TFNB) and 2,2’-bipyridine (bpy). The results of elemental analysis of C, H and N, rare earth complexation titration and differential thermal analysis showed that the compositions of Sm (TFNB) 3bpy.H2O and Sm0.5RE0.5 (TFNB) 3bpy.H2O (RE3 + Y3 +, La3 +, Gd3 +), the complex is stable below 500 ℃. The molar conductivity shows that all the complexes are non-electrolytes. IR spectra and 1H-NMR spectra show that TFNB chelates with rare earth ions through enol-type oxygen anions and the two nitrogen atoms of bpy also coordinate with rare earth ions. Fluorescence spectra and fluorescence lifetime measurements showed that the excitation wavelengths of these complexes were close to those of visible light, both of which could emit the characteristic fluorescence of samarium and had longer fluorescence life. The sensitization of Sm3 + by Y3 +, La3 + and Gd3 + was not strong.