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Citation: LV Xue-Chuan, TAN Zhi-Cheng, GAO Xiao-Han. Synthesis and Thermochemical Properties of New Ternary Lanthanum Complex La(Glu)(Im)₆(ClO₄)₃·4HClO₄·4H₂O[J]. Acta Physico-Chimica Sinica, ;2009, 25(10): 1945-1950. doi: 10.3866/PKU.WHXB20091001 shu

Synthesis and Thermochemical Properties of New Ternary Lanthanum Complex La(Glu)(Im)₆(ClO₄)₃·4HClO₄·4H₂O

1.
School of Chemistry and Material Science, Liaoning Shihua University, Fushun 113001, Liaoning Province, P. R. China

Received Date: 13 May 2009
Available Online: 10 August 2009

A new ternary lanthanum complex, La (Glu) (Im)6 (ClO4)3·4HClO4·4H2O (Glu: glutamic acid, Im: imidazole), was synthesized and its thermodynamic properties were studied. Heat capacities of the complex were measured with a high-precision automatic adiabatic calorimeter over a temperature range from 80 to 390 K and the thermodynamic functions (HT-H298.15) and (ST-S298.15) were derived from the heat capacity data with a temperature interval of 5 K. Glass and phase transitions of the new complex at around 216 and 246 K were observed both by adiabatic calorimetry and differential scanning calorimetry (DSC) analyses. Thermodynamic data of the phase transitions were calculated and the transition mechanism was determined to be a re-orientational process of the perchlorate ions in the complex. The thermal stability of the complex was tested by the thermogravimetric (TG) technique and a possible mechanism for its decomposition was proposed.
- Heat capacity,
- La(Glu)(Im)6(ClO4)3·4HClO4·4H2O,
- Adiabatic calorimetry,
- Thermodynamic function,
- Phase transition,
- Thermal stability
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沈阳化工大学材料科学与工程学院沈阳 110142

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Synthesis and Thermochemical Properties of New Ternary Lanthanum Complex La(Glu)(Im)6(ClO4)3·4HClO4·4H2O

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通讯作者: 陈斌, bchen63@163.com

Synthesis and Thermochemical Properties of New Ternary Lanthanum Complex La(Glu)(Im)₆(ClO₄)₃·4HClO₄·4H₂O