草酰胺合铜(Ⅱ)配合物的合成和热分解反应(英文)

Synthesis and the Thermal Decomposition Reaction of Copper(Ⅱ) Oxamide Complexes

合成了3种单核配合物,通过元素分析、摩尔电导和红外光谱进行了表征。在动态空气下,采用热重和差热技术研究了N,N′-双氨烷基草酰胺合铜(Ⅱ)配合物热分解动力学。用Achar法和Coats-Redfen法分析了非等温动力学数据,并对比动力学参数提出了最合适的热分解动力学模型。由热重曲线计算出了热分解反应的活化能、热焓和指前因子。对比配合物N,N′-双-2氨乙基草酰胺合铜(Ⅱ)、N,N′-双-2氨丙基草酰胺合铜(Ⅱ)和N,N′-双-3-氨丙基草酰胺合铜(Ⅱ)初始分解温度,配合物的热稳定性排序为:Cu(oxpn)>Cu(oxap)>Cu(oxen)

Three mononuclear complexes were synthesized and characterized by elemental analyses,molar conductivity and IR spectral studies.A kinetic study of the thermal decomposition reactions of copper(Ⅱ) complexes with N,N′-bis(alkylaminoalkyl)oxamide was carried out using TG and DTA technique under dynamic air atmosphere.The non-isothermal kinetics data were analyzed by means of the Achar method and the Coats-Redfen method.The most probable kinetic model was suggested by comparison of the kinetic parameters.The activation energies,entropies,and the pre-exponential factor of the thermal decomposition reactions were calculated with thermogravimetric curves.The initial temperature of decomposition was compared with those obtained for the complexes N,N′-bis(2-aminopropyl)oxamidocopper(Ⅱ),N,N′-bis(2-aminopropyl)oxamidoc-opper(Ⅱ),and N,N′-bis(3-aminopropyl)oxamidocopper(Ⅱ). The sequence of thermal stability is:Cu(oxpn)>Cu(oxap)>Cu(oxen).