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| Keywords | |
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complex of rare earths |
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amino acid |
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standard enthalpy of formation |
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thermal analysis kinetics |
| Authors | |
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ZHANG Zhong-Hai |
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KU Zong-Jun |
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LIU Yi* |
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QU Song-Sheng |
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Study on Thermochemistry and Thermal Decomposition Kinetics of Dy(Tyr)(Gly)3Cl3·3H2O
ZHANG Zhong-Hai1,2, KU Zong-Jun1, LIU Yi*,2, QU Song-Sheng2
1Department of Chemistry, Xiaogan University, Xiaogan, Hubei 432000, China
2Department of Chemical Biology, College of Chemistry and Molecular Science, Wuhan University, Wuhan, Hubei 430072, China
The complex of dysprosium chloride with glycine and L-tyrosine, Dy(Tyr)(Gly)3Cl3•3H2O, was synthesized and characterized. The standard molar formation enthalpy of Dy(Tyr)(Gly)3Cl3•3H2O at T＝298.15 K was determined to be (－4287.10±2.14) kJ/mol. The kinetics of thermal decomposition of the complex was studied by non-isothermal TG-DTG curves. The kinetic parameters and mechanism function of the thermal decomposition reaction for its second step were proposed. The kinetic equation could be expressed as: dα/dT＝3.14×1020 s-1/βexp(－209.37 kJ•mol－1/RT)(1－α)2.