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

Abstract

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-NH_3^-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-NH_3^--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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Yang Jinghe, Zhu Guiyun, Si Zhikun, Wang Dafang . Studies on Fluorescence Enhancement Effect of Eu-Gd-DBM-NH_3^- Organic Solvent System[J]. Chem. J. Chinese Universities, 1990, 11(4): 385.

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Studies on Fluorescence Enhancement Effect of Eu-Gd-DBM-NH_3^- Organic Solvent System

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