高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (4): 385.

• 研究论文 • 上一篇    下一篇

铕-钆-二苯甲酰甲烷-氨体系荧光增强效应的研究

杨景和, 朱贵云, 司志坤, 王大方   

  1. 山东大学化学系
  • 收稿日期:1988-07-13 出版日期:1990-04-24 发布日期:1990-04-24
  • 通讯作者: 杨景和

Studies on Fluorescence Enhancement Effect of Eu-Gd-DBM-NH3- Organic Solvent System

Yang Jinghe, Zhu Guiyun, Si Zhikun, Wang Dafang   

  1. Department of Chemistry, Shandong University, Jinan
  • Received:1988-07-13 Online:1990-04-24 Published:1990-04-24

摘要: 报道了Eu-DBM-NH3的溶剂效应和共发光效应。甲醇、丙酮和乙醇等溶剂对该体系有明显的增敏作用;Gd3+>、Y3+、Tb3+、La3+和Lu3+等可显著增强其荧光强度,并以Gd3+效果最好。该体系可用于超痕量铕的测定,检出限为3.0×10-11mol/L,比无Gd3+时约降低2个数量级。

关键词: 溶剂效应, 共发光效应, 荧光光度法, 铕的测定

Abstract: In the present paper, solvent and co-luminescence effects of Eu-DBM-NH3 system are reported. The results show that the organic solvents (such as methanol, acetone, ethanol) make the system to produce sensitized fluorescence considerably.Anew fluorescence-enhanced phenomenon, which is produced by adding Gd3+, Y3+, Tb3+, La3+ and Lu3+ to Eu-DBM-NH3-acetone system, can be observed. Of these, Gd3+can enhance the fluorescence intensity by two orders of magnitude in comparison with that of the system without Gd3+. Eu-Gd-DBM-NH3--acetone system can be used for the determination of trace amount of Eu3+ in the range from 1. 0× 10-10 to 6. 0×10-8 mol/L. The detection limit is 3. 0× 10-11 mol/L.In addition, the luminescence mechanism of this system is discussed.

Key words: Solvent effect, Co-luminescence effect, Fluorimetry, Determination of europium

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