铕-2-甲硫基烟酸掺杂配合物的合成及荧光性质研究  

Synthesis and Fluorescence Properties of Doped Europium Complexes with 2-( Methylthio) Nicotinic Acid

作　　者：文君[1,2] 杜莹[1] 杨蕾[1] 廖莉玲[1] 

机构地区：[1]贵州师范大学化学与材料科学学院,贵州贵阳550001 [2]贵州师范学院化学与生命科学学院,贵州贵阳550018

出　　处：《中国稀土学报》2014年第4期445-452,共8页Journal of the Chinese Society of Rare Earths

基　　金：贵州省科技厅与贵州师范大学联合基金(黔科合J字LKS[2009]39);教育部春晖计划项目(Z2006-1-52007);贵州省应用化学与特色重点学科(黔教科研发项目(2012)442)资助

摘　　要：由2-甲硫基烟酸(HA)与Eu(Ⅲ)合成了二元配合物和13种分别掺杂La(Ⅲ),Y(Ⅲ),Zn(Ⅱ)的三元配合物。通过红外、紫外、元素分析、荧光光谱和热重分析对配合物进行了表征。并着重研究了掺杂离子、溶剂、配合物溶液的浓度对配合物中Eu(Ⅲ)发光性能的影响。紫外光谱显示HA与铕离子配位后其吸收峰强度发生较大改变。红外光谱表明2-甲硫基烟酸中的羧基与铕离子以螯合双齿配位,且单一配合物和掺杂配合物具有相似的配位结构。荧光光谱表明La(Ⅲ),Y(Ⅲ),Zn(Ⅱ)掺杂可以提高铕配合物的荧光强度,其中La(Ⅲ)掺杂荧光强度增强最明显。配合物(Eu0.5Zn0.5)(A)2.5·3H2O以乙醇为溶剂,浓度为5×10-5mol·L-1时,其荧光强度是最强的。Europium binary complex with 2-（ methylthio） nicotinic acid and 13 kinds of ternary europium doped La（ Ⅲ）,Y（ Ⅲ）,Zn（ Ⅱ） complexes were synthesized and characterized by IR,UV,elemental analysis,fluorescence spectra and TG-DSC. The effect of doping ion,solvents,the concentration of the complex solution on fluorescence properties of Eu（ Ⅲ） complexes was studied. The ultraviolet spectrum showed that the intensity of absorption peak changed obviously after 2-（ methylthio） nicotinic acid and europium ion coordination. The infrared spectrashowed that the carboxyl of 2-（ methylthio） nicotinic acid and europium ions in chelating bidentate mode and the binary complex and doped ternary complexes had similar coordination structure. The fluorescence spectra showed that doped La（ Ⅲ）,Y（ Ⅲ）,Zn（ Ⅱ） complexes could enhance fluorescence intensity of europium and doped La（ Ⅲ）was most obvious. The fluorescence intensity of（ Eu0. 5Zn0. 5）（ A）2. 5·3H2O was the strongest with ethanol as solvent,5 × 10^-5mol·L^- 1concentration.

关 键 词：2-甲硫基烟酸 铕配合物 荧光 掺杂 

分 类 号：O614.33[理学—无机化学]