N，N，N’-三苄基-1，1’-联萘-2，2’-二（杂氧乙酰胺）及稀土配合物的合成、表征和荧光性质

合成了一种不对称舍联萘骨架酰胺类开链冠醚配体N，N，N’-三苄基-1，1’-联萘-2，2’-二（氧杂乙酰胺）（L）及其4种稀土配合物．通过核磁共振氢谱、元素分析、摩尔电导率、红外吸收光谱、差热-热重等分析方法，对配体及配合物组成和结构进行了表征．结果表明，4种稀土配合物组成为RE（pic）3L·2H2ORE—La（Ⅲ），Eu（Ⅲ），Tb（Ⅲ），Y（Ⅲ）]．推测了该系列配合物的结构，稀土离子配位数为10．在不同溶剂中，对Eu（III）和Tb（Ⅲ）配合物荧光性质进行了研究，发现Eu（Ⅲ）配合物的荧光强度受溶剂效应的影响，荧光强度随溶剂配位能力的增强而减弱．在相同条件下，Eu（Ⅲ）配合物的荧光强度远大于Tb（Ⅲ）配合物，说明配体L的三重态能级与Eu^3＋的激发态能级匹配较好．

Synthesis,Characterization and Fluorescence Property of Complexes of Rare Earth with N,N,N'-tribenzyl-1,1'-dinaphthyl-2,2'-bis(oxaacetamide)

An amide-based open-chain crown ether with the structure of 1,1 ＇-binaphthyl, N, N, N＇-tribenzyl-1,1 ＇- dinaphthyl-2,2 ＇-bis （oxaacetamide）and its four rare earth complexes were synthesized. The complexes was characterized by ^1HNMR, elemental analysis, molar conductivity, IR spectra and TG-DTA. The results indicate that the general formula of the complexes is RE（pic）3L·2H2O RE=La（Ⅲ）, Eu（Ⅲ）, Tb（Ⅲ）, Y（Ⅲ）]. The proposed structure of the complexes shows that the coordination number of the rare earth ions is ten. With the different solvent, the fluorescence intensity of the europium complex was reduced with the raising coordination ability of the solvent, which is solvate effect. In the same condition, the europium complex exhibited much stronger fluorescence than that of the terbium complex. It is due to that the triplet state energy level of the ligand matches much better to the resonance level of Eu^3＋.