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Citation: WANG Yan, NIE Guang-Hua, DAN You-Meng, YANG Yi-Xin. Synthesis, Characterization,Fluorescence Property and Thermal Decomposition Kinetics of Complex of Rare Earth Eu(Ⅲ) with Acetylalanine and Imidazole[J]. Chinese Journal of Applied Chemistry, ;2006, 23(11): 1253-1258. shu

Synthesis, Characterization,Fluorescence Property and Thermal Decomposition Kinetics of Complex of Rare Earth Eu(Ⅲ) with Acetylalanine and Imidazole

1.
a School of Chemical and Environmental Engineering, Hubei Institute for Nationalities, Enshi 445000;
2.
b Department of Chemistry, Northwest University, Xi'an 710069

Corresponding author: WANG Yan,
Received Date: 20 November 2005
Available Online: 13 April 2006
Fund Project: 陕西省教育厅专项项目(04JK1433) (04JK1433)湖北民族学院科研项目(2005LB003) (2005LB003)

A new solid complex of rare earth Eu(Ⅲ) with N-acetyl-DL-alanine(C₅H₉NO₃,Ac-Ala) and imidazole(C₃H₄N₂,Im) was synthesized and characterized by means of chemical and elemental analyses,FTIR,UV,¹H NMR,¹³C NMR and XRD.The composition of the complex was confirmed to be Eu(C₅H₈NO₃)₂(C₃H₅N₂)₂Cl₃·3H₂O.The thermal decomposition of the complex was studied via TG-DTG curve.By means of the Achar method and the Coats-Redfern method,the non-isothermal kinetic data of the dehydration stage of the complex was analyzed.The most probable reaction mechanism was suggested by comparing the kinetic parameters.The kinetic equation for the dehydration stage could be expressed as dα/dt=A/β·e^-E/RT{(1-α)[-ln(1-α)]^-1/2}.Luminescence measurement showed that the complex emits fluorescence.
- Eu(Ⅲ) complex,
- N-acetyl-DL-alanine,
- imidazole,
- fluorescence property,
- thermal decomposition,
- non-isothermal kinetics
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