一种含1,1′-联萘骨架酰胺型开链冠醚及稀土硝酸盐配合物的合成、表征和荧光性质  

Synthesis,Characterization and Fluorescent Property of Complexes of Rare Earth Nitrate with a Amide-based Open-chain Crown Ether Containing 1,1'-binaphthyl

作　　者：张丽军[1] 杨天林[1] 侯林荣[1] 高继红[1,2] 

机构地区：[1]宁夏大学能源化工重点实验室化学化工学院,银川750021 [2]宁夏大学学术期刊中心,银川750021

出　　处：《材料导报（纳米与新材料专辑）》2008年第1期321-324,共4页

基　　金：宁夏自然科学基金项目(NZ0507);宁夏大学科学研究基金项目

摘　　要：合成了N,N′-二乙基-N,N′-二苯基-1,1′-联萘-2,2′-二(氧杂乙酰胺)(L),用调节反应溶剂极性的方法制备了其5种稀土硝酸盐配合物。通过元素分析、摩尔电导率、红外吸收光谱、紫外吸收光谱、差热-热重分析,对此系列配合物的组成和结构进行了分析表征。结果表明:配合物组成为RE(NO_3)_3L·2H_2O[RE=La(Ⅲ)、Eu(Ⅲ)、Tb(Ⅲ)、Ce(Ⅲ)、Yb(Ⅲ)],并推测了该系列配合物的结构。室温下,测定了配合物的荧光光谱,发现Eu(Ⅲ)配合物表现出较强的Eu^(3+)特征荧光,而Tb(Ⅲ)配合物表现出较弱的Tb^(3+)特征荧光,说明配体L的三重态能级与Eu^(3+)的最低激发态能级匹配较好。同时发现Eu(Ⅲ)配合物和Tb(Ⅲ)配合物荧光强度随溶剂配位能力增强而减弱,即受溶剂效应影响。A amide-based open-chain crown ether containing 1,1＇-binaphthyl and its five kinds rare earth nitrate complexes are synthesized. The complexes are characterized by elemental analysis, molar conductivity, UV spectra, IR spectra, and TG-DTA. The results indicate that the general formula of the complexes is RE（NO3 ）3 L · 2H2 O [RE= La（ Ⅲ ）, Eu（ Ⅲ ）, Tb（ Ⅲ ）, Ce（Ⅲ）, Yb（ Ⅲ ）], then the proposed structure of the complexes is presumed. At room tem- perature, the fluorescence spectra of the complexes is studied, and it＇s found that the characteristic emission bands of Eu3＋ from the Eu（Ⅲ ） complex are stronger, while the characteristic emission bands of Tb（Ⅲ） complex are very weak. It＇s indicated that the energy level of the triplet state of L is well matched with the lowest excited state level of the Eu3＋. In the different solvents, the fluorescent intensities of the Eu（ Ⅲ ） and Tb（ Ⅲ） complex are reduced with the raising coordination ability of solvent which is solvate effect.

关 键 词：1 1'-联萘酰胺型开链冠醚稀土硝酸盐配合物荧光性质 

分 类 号：O614.3[理学—无机化学]