2.巯基吡啶汞(Ⅱ)的合成及热分解动力学

合成了以2-巯基吡啶为配体的汞(Ⅱ)配合物,通过元素分析、EDTA络合滴定分析和红外光谱对其进行了表征,同时采用TG-DTG技术研究了配合物的热分解机理及非等温动力学。结果表明:其配合物热分解过程经过二个阶段,第一步热分解属F2(化学反应)机理控制,非等温热分解的动力学方程为dα/dT=A/β.e-E/RT(1-α)2,表观活化能E=189.67 kJ/mol,指前因子A=3.79×1018/s。

Synthesis and Thermal Decomposition Kinetics of Hydrargyrum 2-Mercaptopyridine

2-mercaptopridine base derived Hg（ Ⅱ ） complex was synthesized. The complex was character/zed by elemental analysis, titration analysis and IR. The thermal decomposition of hydrargyrum 2-mercaptopridine and its non-isothermal kinetics were studied by TG-DTG technique. The TG-DTG curves showed that its thermal decomposition was two-step process. The mechanism function and kinetic parameters of the thermal decomposition in the first step were obtained. Chemical reaction mechanism （F2） controlled the first thermal decomposition process. The kinetic equation may be expressed as： dα/dT=A/β.e-E/RT（1-α）2, The apparent activation energy and the pre-exponential factor were 189.67 kJ·mol^-1 and 3.79 × 10^18 s^-1 respectively.