论文部分内容阅读
合成了苦味酸铋配合物(Bi-PA),对其结构进行了表征,并用TG-DTG及DSC技术研究了化合物的热行为和分解反应动力学。结果表明,在TG曲线上出现一个最大的失重阶段,对应于DSC曲线上的最大放热峰。放热分解反应过程可以认为是化学反应,其机理方程的微分式为f(α)=3(1-α)[-ln(1-α)]2/3,动力学方程为dα/dt=1013.51(1-α)[-ln(1-α)]2/3e-1.96×104/T。反应阶段的活化熵(ΔS≠),活化焓(ΔH≠)及活化自由能(ΔG≠)分别为2.25J.mol-1.K-1,159.82kJ.mol-1及158.60kJ.mol-1。
The bismuth picrate complex (Bi-PA) was synthesized and its structure was characterized. The thermal behavior and decomposition kinetics of the compound were studied by TG-DTG and DSC. The results show that there is a maximum phase of weight loss on the TG curve corresponding to the maximum exothermic peak on the DSC curve. The exothermic decomposition reaction process can be considered as a chemical reaction. The differential equation of the mechanism equation is f (α) = 3 (1-α) [- ln (1-α)] 2/3 and the kinetic equation is dα / dt = 1013.51 (1-α) [- ln (1-α)] 2 / 3e-1.96 × 10 4 / T. The activation entropy (ΔS ≠), activation enthalpy (ΔH ≠) and activation free energy (ΔG ≠) were 2.25J.mol-1.K-1, 159.82kJ.mol-1 and 158.60kJ.mol-1, respectively.