Study on Thermochemistry and Thermal Decomposition Kinetics of Dy(Tyr)(Gly)₃Cl₃·3H ₂O

Abstract

The complex of dysprosium chloride with glycine and L-tyrosine, Dy(Tyr)(Gly) 3 Cl 3 •3H 2 O, was synthesized and characterized. The standard molar formation enthalpy of Dy(Tyr)(Gly) 3 Cl 3 •3H 2 O 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＝3.14×10 20 s -1 / βexp(-209.37 kJ•mol -1 /RT)(1-α) 2 .

Calorimetric Studies of the Interactions between Several Aminophosphonic Acids and Urea in Aqueous Solutions at 298.15 K

“…Many scientific centers are carrirng out research on physical properties of amino acids, peptides, and proteins using calorimetric method. This technique is useful for measuring the enthalpy of dissolution, − dilution, − and mixing. , …”