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Citation: Yan Wen-Fei, Liao Hua, Shi Nai, Zhou Wei-Jin, Wu Jin-Guang, Xu Guang-Xian. Fluorescence Spectra of Europium and Sodium Naphthenate Microemulsion System[J]. Acta Physico-Chimica Sinica, ;2000, 16(03): 269-272. doi: 10.3866/PKU.WHXB20000315 shu

Fluorescence Spectra of Europium and Sodium Naphthenate Microemulsion System

1.
Peking University-The Hong Kong University Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry,The State Key Laboratory of Rare Earth Materials Chemistry and Applications,Deprtment of Chemistry,Peking University,Beijing 100871

Received Date: 24 June 1999
Available Online: 15 March 2000

The microemulsion behaviors of europium and sodium salts of naphthenic acid were studied using fluorescence measurements. It was found that 5D0 decay coefficient of europium was 2.08 ms-1 for 100%europium naphthenate, and the coefficients were 1.56, 1.08 and 0.83 ms-1 for 75%, 50% and 20%europium salt of sodium saponified acid respectively. It can be seen that the decay coefficients were also 2.08 ms-1 at the inflexion of curves in the 75%, 50% and 20% europium naphthenate systems with water content. The data reveal that, if there is enough water in the microemulsion, the coordination condition of europium ion in the above microemulsion is similar. It was also found that, for the 75%、60%、50%、40% and 20% europium naphthenate microemulsion systems, the relative fluorescence intensities sharply decrease with the increase of water content and reach a steady values at the same water content.
- Extraction,
- Reversed micelle,
- Microemulsion,
- Fluorescence
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