新型铕,铽(Ⅲ)三元配合物的合成、表征及发光性能  

Synthesis,Characterization and Luminescent Properties of Novel Europium,Terbium(Ⅲ) Ternary Complexes

作　　者：程果[1] 魏长平[1] 任晓明[1] 王贺[1] 

机构地区：[1]长春理工大学化学与环境工程学院,吉林长春130022

出　　处：《中国稀土学报》2012年第1期120-124,共5页Journal of the Chinese Society of Rare Earths

基　　金：吉林省教育厅"十一五"科技项目(201028;201034)资助

摘　　要：采用Claisen缩合反应设计合成了β-二酮配体1-(4-溴苯)-4,4,4-三氟丁烷-1,3-二酮(BPT),并合成了相应的新型稀土Eu,Tb(Ⅲ)三元配合物。通过元素分析、1H NMR谱、红外光谱、紫外光谱、荧光光谱和磷光光谱技术对合成的产物进行了表征和分析。红外光谱分析表明:BPT中存在着酮式-烯醇式互变;配合物中的稀土离子与BPT中的氧原子以及Phen中的氮原子形成了配位键。紫外光谱表明配合物主要是由第一配体BPT吸收能量。荧光光谱显示Eu(BPT)3Phen的发光强度较大,进一步的研究表明,BPT的最低三重态能级与Eu3+的5D0能级匹配较好。The β-diketone 1-（4-bromophenyl）-4,4,4-trifluorobutane-1,3-dione（BPT） was synthesized at room temperature by classical Claisen condensation reaction.And the new rare-earth Eu,Tb（Ⅲ） ternary complexes were prepared by a precipitation method.The ligand BPT and complexes were characterized by elemental analysis,1H NMR spectra,IR spectra,UV spectra,fluorescence spectra and phosphorescence spectra.The IR spectra indicated that the ligand BPT contained the structure of β-diketone,where existed enol tautomer;the rare-earth ion in the complexes was coordinated with six oxygen atoms of three BPT ligands and two nitrogen atoms of the second ligand Phen.The UV spectra showed that the main absorption was from the first ligand BPT in the complexes.The excitation and emission spectra of the complexes were measured and investigated.The fluorescence spectra demonstrated that the complexes could emit characteristic fluorescence of rare-earth ion and the strongest emission band was narrow which was attributed to the transitions of the 4f electrons of the central ions.The fluorescence intensity of Eu（BPT）3Phen was obviously higher than that of Tb（BPT）3Phen,this indicated that the fluorescence of complexes was influenced with the matching of energy level between the triplet state of ligand BPT and the emission energy of rare-earth ion.In Eu（BPT）3Phen,the energy level difference was well matched and the emission of Eu3＋ was stronger.

关 键 词：Β-二酮 合成 发光 能级匹配 稀土 

分 类 号：O614.33[理学—无机化学]