冠醚增敏稀土配合物荧光增强效应的研究及其应用  

Study on the Fluorescence Enhancement of Rare Earth Complex System Sensitized by Crown Ethers and Its Application

作　　者：姜玮[1,2] 司志坤 王磊 

机构地区：[1]山东大学化学系 [2]山东医科大学药学系

出　　处：《分析试验室》1997年第4期28-31,共4页Chinese Journal of Analysis Laboratory

摘　　要：本文详细研究了二苯并－１８－冠－６对Ｓｍ－ＴＴＡ荧光体系的增敏作用和稀土离子Ｄｙ３＋对Ｓｍ－ＴＴＡ－冠醚体系的荧光增强效应。在冠醚存在下，Ｓｍ－ＴＴＡ二元配合物荧光体系的荧光强度增加了２８０倍。Ｓｍ－ＴＴＡ－二苯并－１８－冠－６体系中引入适量的Ｄｙ３＋后，使体系的荧光强度提高２６倍。对Ｓｍ－ＴＴＡ－冠醚和Ｓｍ－Ｄｙ－ＴＴＡ－冠醚体系，Ｓｍ的浓度分别在２．０×１０－７～１．０×１０－５ｍｏｌ／Ｌ和１．０×１０－７～１．０×－６ｍｏｌ／Ｌ范围内与体系的荧光强度成线性关系，检测限分别为２．０×１０－８ｍｏｌ／Ｌ和５．０×１０－９ｍｏｌ／Ｌ。采用多点增量标准加入法测定混合稀土样品中痕量的Ｓｍ，可获得满意结果。In the luminescence system of Sm thenoyltrifluoroacetone (TTA),we observed a new fluorescence enhancement phenomenon,which occurred by adding some crown ethers to the above system.The fluorescence intensity of the system was increased about 280 fold by adding dibenzo 18 crown 6.We also found that the fluorescence intensity of Sm TTA DB18C6 system was enhanced about 26 fold by adding Dy 3+ .The fluorescence intensity was a linear function of the concentration of samarium in the range of 2.0×10 -7 ～1 0×10 -5 mol/L and 1.0×10 -7 ～1 0×10 -6 mol/L,the detection limit was 2.0×10 -8 mol/L and 5.0×10 -9 mol/L for Sm TTA DB18C6 and Sm Dy TTA DB18C6 systems ,respectively.The systems were used for the determination of Samarium in rare earth samples with satisfactory results.

关 键 词：荧光光度法 钐 镝 冠醚 增敏 

分 类 号：O614.337[理学—无机化学]