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研究水溶液中二高碘酸合铜 (Ⅲ)配离子 (DPC)的稳定性 ,以及水溶液中 DPC对乙醇的氧化机理 .考察乙醇浓度、高碘酸根浓度、氢氧化钾浓度、离子强度和温度等对 DPC氧化乙醇的影响 .结果表明 ,在采用的具体实验条件下 ,反应对 DPC为一级 ,准一级速率常数 kobs与乙醇浓度有良好的线性关系 .kobs随着高碘酸根浓度的增大而减小 ,随着 KOH浓度的增大而增大 ;kobs的倒数与KOH浓度的倒数也有良好的线性关系 ,而离子强度对反应速率影响不大 .同时 ,根据温度对反应速率的影响 ,估算反应的活化能 .通过对实验结果的综合分析 ,提出 DPC氧化乙醇的机理 ,对机理进行详细的讨论 .
The stability of DIC and the oxidation mechanism of ethanol by DPC in aqueous solution were studied.The effects of ethanol concentration, periodate concentration, potassium hydroxide concentration, ionic strength and temperature On the DPC oxidation of ethanol.The results showed that under the specific experimental conditions used, the reaction on the DPC for the first-order, quasi-first-order rate constant kobs and ethanol concentration has a good linear relationship.Kobs with the increase of the periodate concentration But decreased with the increase of KOH concentration.The reciprocal of kobs also had a good linear relationship with the reciprocal of KOH concentration.The effect of ionic strength on the reaction rate was not significant.At the same time, Reaction activation energy.By comprehensive analysis of the experimental results, the mechanism of ethanol oxidation by DPC is proposed and the mechanism is discussed in detail.