KBrO3-CH3CH(NH2)CO2H-MnSO4-[Fe(phen)3]SO4-H2SO4体系的化学振荡反应

本文首次报道须在两种金属离子同时作用下的振荡反应─KBrO3-CH3CH(NH2)CO2H-MnSO4-F3(phen)3]SO4-H2SO4体系的振荡反应, 对反应产物作了分析, 研究了两种金属离子在振荡反应中的不同作用, Mn^2^+起催化氧化丙氨酸以产生丙酮酸的作用, 而Fe(phen)3]^2^+则是丙酮酸-BZ型反应的催化剂。研究了温度变化对振荡反应的影响, 从而得出振荡反应各阶段的有观活化能。考察了Cl^-、自由基抑制剂及反应物浓度对振荡反应的影响。实验证明, 振荡反应同时受Br^-及Br2的控制, 振荡机理与Br2^-水解控制模型相同。

Chemical oscillating reactio in the system of KBrO3-CH3CH(NH2)CO2H-MnSO4-[Fe(phen)3]SO4-H2SO4

The title system produces oscillations only when it is catalyzed by both Mn2+ and Fe(phen)3]2+. Mn2+ catalyzes the oxidation of alanine to produce pyruvic acid, while Fe(phen)3]2+ is the real catalyst in the pyruvic acid oscillating reaction. The effects of temperature on the oscillation were also studied and the activation energies calculated The effects of other factors on the oscillations were also studied. The oscillations are controlled by both Br- and Br2. Thus, the oscillating mechanism is the same as that of the Br2 hydrolysis model.