摘要
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。
The complexes of samarium and different binuclear rare earth Sm（Ⅲ）-Y（Ⅲ）,Sm（Ⅲ）-La（Ⅲ） and Sm（Ⅲ）-Ga（Ⅲ） with 2-naphthoyltrifluoroacetone and 2,2,-bipyridine have been synthesized and characterized by elemental analysis,rare earth complexometry,molar conductivity,IR and UV spectra,1HNMR spectra and TG-DTA.The results suggest that the complexes have the composition of Sm（TFNB）3bpy·H2O,Sm0.5Y0.5（TFNB）3 bpy·H2O,Sm0.5La0.5（TFNB）3bpy ·H2O and Sm0.5Gd0.5（TFNB）3bpy ·H2O,respectively.They are all nonelectrolyte,each with a coordinated water molecule.The ligands coordinate with RE ions through the oxygen negative ion of enol form in TFNB and two nitrogen atoms of 2,2,-bipyridine.The fluorescence spectra and fluorescence lifetimes of the complexes are determined at room temperature.The results show that fluorescence emission intensity data and fluorescence lifetimes are different for the complexes,the data of samarium complex is higher,different binuclear（1∶1） rare earth complexes are weaker,but the fluorescence intensity are higher than the 1/2 samarium complex＇s,it suggest that there are weaker enhanced fluorescence intensity after doping with Y3＋,La3＋ and Ga3＋.
出处
《稀土》
EI
CAS
CSCD
北大核心
2010年第5期1-6,共6页
Chinese Rare Earths
基金
国家自然科学基金项目资助(20461002)
教育部基金项目(Z2004-2-15029)
内蒙古自然科学基金项目(200708020104)
