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本文首次报道须在两种金属离子同时作用下的振荡反应——KBrO_3-CH_3CH(NH_2)CO_2H-MnSO_4-[Fe(phen)_3]SO_2-H_2SO_4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表观活化能.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Br_2的控制,振荡机理与Br_2-水解控制模型相同.
In this paper, we report for the first time that the oscillatory reaction of KBrO_3-CH_3CH (NH_2) CO_2H-MnSO_4- [Fe (phen) _3] SO_2-H_2SO_4 system under the simultaneous action of two metal ions has been reported. The different roles of the two metal ions in the oscillatory reaction, Mn 2+ catalyze the oxidation of alanine to generate pyruvate, and [Fe (phen) 3] 2+ is a pyruvate- BZ reaction.The influence of temperature on the oscillatory reaction was studied, and the apparent activation energy of each phase of the oscillating reaction was obtained.The effects of Cl ~ -, free radical inhibitor and reactant concentration on the oscillatory reaction were investigated. It is proved that the oscillatory reaction is controlled by Br ~ - and Br_2 at the same time, and the oscillating mechanism is the same as the Br_2 -hydrolysis control model.