| Dy(Tyr)(Gly)3Cl3·3H2O的热化学和热分解动力学研究 |
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| 引用本文： | 张忠海,库宗军,刘义,屈松生.Dy(Tyr)(Gly)3Cl3·3H2O的热化学和热分解动力学研究[J].中国化学,2005,23(9):1146-1150. |
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| 作者姓名： | 张忠海 库宗军 刘义 屈松生 |
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| 作者单位： | 孝感学院化学系, 孝感 432000;武汉大学化学与分子科学学院, 武汉 430072 |
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| 摘 要： | 以氯化镝、甘氨酸和L-酪氨酸为原料合成了配合物Dy(Tyr)(Gly)3Cl3·3H2O. 用溶解-反应热量计测得配合物在298. 15K时的标准摩尔生成焓为–(4287. 10±2. 14) kJ / mol. 并用TG-DTG技术对配合物进行了非等温热分解动力学研究, 推断出配合物第二步热分解反应的动力学方程为: dα/dT＝3. 14 ×1020 s-1/βexp(-209. 37 kJ / mol /RT)(1-α)2.
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| 关 键 词： | 稀土配合物 氨基酸 标准生成焓 热分析动力学 |
| 收稿时间： | 2005-1-17 |
| 修稿时间： | 2005-6-26 |
Study on Thermochemistry and Thermal Decomposition Kinetics of Dy(Tyr)(Gly)3Cl3·3H 2O |
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| Zhong‐Hai Zhang,Zong‐Jun Ku,Yi Liu,Song‐Sheng Qu.Study on Thermochemistry and Thermal Decomposition Kinetics of Dy(Tyr)(Gly)3Cl3·3H 2O[J].Chinese Journal of Chemistry,2005,23(9):1146-1150. |
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| Authors: | Zhong‐Hai Zhang Zong‐Jun Ku Yi Liu Song‐Sheng Qu |
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| Abstract: | 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=3.14×1020s‐1/βexp(‐209.37 kJ · mol‐1/RT)(1?α) 2. |
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| Keywords: | complex of rare earths amino acid standard enthalpy of formation thermal analysis kinetics |
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