2,2,2-胺三乙酰-苄胺及其稀土配合物的合成·表征与荧光性质研究

目的]研究三脚架型稀土配合物的组成、配位状态及荧光性质。方法]通过摩尔电导率、红外光谱、核磁共振波谱、元素分析、差热-热重分析,研究三脚架型配体2,2,2-胺三乙酰-苄胺(L)及其稀土配合物的组成、荧光性质。结果]2,2,2-胺三乙酰-苄胺的稀土配合物的组成为:Re(NO3)3.L.4H2O(Re=La3+,Sm3+,Y3+,Tb3+,Ce3+,Eu3+),在DMF中为2∶1型电解质,其中的NO3-与金属离子以单齿形式配位。各稀土配合物在248~635℃出现2~3个放热峰,相应于配合物的各级氧化分解过程。Tb(NO3)3.L.4H2O配合物具有Tb3+的特征尖锐线状荧光;在浓度为1×10-4mol/L的甲醇溶液中,配合物的荧光强度最强。结论]溶剂的极性越大,2,2,2-胺三乙酰-苄胺对Tb3+的敏化作用越强,配合物的荧光强度越强。

Synthesis, Characterization and Fluorescence Property of 2,2,2-amine Tri Acetyl-benzylamine and its Rare Earth complex

Objective] The aim was to study the composition,coordination status and fluorescence property of rare earth complex with tripod type.Method] The composition and fluorescence property of 2,2,2-amine tri acetyl-benzylamine(L) with ligand of tripod type were studied through Molar conductivity,infrared spectrum,NMR,elemental analysis,thermal analysis,and DTA-TG analysis.Result] The composition of the rare earth complex of 2,2,2-amine tri acetyl-benzylamine was Re(NO3)3·L·4H2O(Re=La3+,Sm3+,Y3+,Tb3+,Ce3+,Eu3+),and 2∶1 electrolyte in DMF,in which NO3-coordinated with metal ion in the form of single tooth.Each rare earth complex emerged 2-3 exothermic peak at 248-635 ℃,corresponding to each level of oxidative decomposition course for complex.The complex Tb(NO3)3·L·4H2O had characteristics of condyloma line shape of fluorescence of Tb3+;in the methanol solution with concentration of 1×10-4 mol/L,fluorescence intensity of complex was the strongest.Conclusion] The polarity of solvent was getting larger,the sensitization of 2,2,2-amine tri acetyl-benzylamine to Tb3+ was more intense and fluorescence intensity of complex was stronger.