N，N′-二苄基-1，1′-联萘-2，2′-二(氧杂乙酰胺)及稀土配合物的合成、表征与荧光性质  

Synthesis,Characterization and Fluorescence Property of Complexes of Rare Earth with N,N'-Dibenzyl-1,1'-Dinaphthyl-2,2'-Bis(oxaacetamide)

作　　者：张丽军[1,2] 杨天林[1,2] 侯林荣[1,2] 

机构地区：[1]宁夏大学能源化工重点实验室,宁夏银川750021 [2]宁夏大学化学化工学院,宁夏银川750021

出　　处：《宁夏工程技术》2008年第2期136-140,共5页Ningxia Engineering Technology

基　　金：宁夏自然科学基金(NZ0507);宁夏大学科学研究基金

摘　　要：为了研究以1,1′-联萘为骨架的酰胺类开链冠醚配体稀土配合物的组成和荧光性质,合成了N,N′-二苄基-1,1′-联奈-2,2′-二(氧杂乙酰胺)配体(L)及其5种稀土苦味酸盐配合物.通过核磁共振氢谱、元素分析、摩尔电导率、红外吸收光谱、紫外吸收光谱等分析方法,对配体及配合物组成进行了表征.结果表明,稀土离子与配体形成了n(M^(3+)):n(L)=2:3型配合物,稀土配合物组成为[RE(pic)_3]_2L_3·6H_2O(RE=La^(3+),Eu^(3+),Gd^(3+),Tb^(3+),Y^(3+)),并推测配合物中存在L与1个稀土离子配位,同时又与2个稀土离子桥联配位的2种配位形式.室温下,该系列配合物的荧光光谱表明,Eu(Ⅲ)配合物表现出较强的Eu^(3+)特征发射,而Tb(Ⅲ)配合物表现出微弱的荧光发射,其他配合物没有相应稀土离子的特征荧光.说明L的三重态能级与Eu^(3+)的激发态能级匹配较好.Eu(Ⅲ)配合物在不同溶剂中的荧光强度表明,荧光强度受溶剂效应影响,且随着溶剂配位能力增强而减弱.In order to study the composition and the fluorescence properties of the complexes of amide-based open-chain crown ether containing the structure of 1,1 ＇-binaphthyl, N,N＇-dibenzyl-1,1 ＇-dinaphthyl-2,2＇-bis （oxaacetamide） and its five rare earth complexes were synthesized. The ligand and its complexes was characterized by ^1H-NMR, elemental analysis, molar conductivity, IR spectra, UV spectra. The results indicate that the general formula of the complexes is [RE （pic）3]2L3·6H2O （RE=La^3＋,Eu^3＋,Gd^3＋,Tb^3＋,Y^3＋） and L and rare earth ions are constitute n（M）：n（L）=2：3 complexes. The ligand probably coordinated with rare earth ion in two coordination modes： one is only coordinating with one rare earth ion, the other type is coordinating with two rare earth ions. At room temperature, the fluorescence spectra study shows that only the complex Eu（Ⅲ） put up stronger characteristic emission bands of the Eu^3＋, the the characteristic emission bands of Tb（Ⅲ） complex were very weak and the other rare earth complexes were not found. It indicated that the energy level of the triplet state of L were well matched with the lowest excited state level of the Eu^3＋. In different solvent, the fluorescence intensity of the Eu（Ⅲ） complex was reduced with the raising coordination ability of solvent which is solvate effect.

关 键 词：酰胺 开链冠醚 稀土 配合物 荧光性质 

分 类 号：O614.33[理学—无机化学]