中草药当归的B-Z振荡反应研究

Researching on the B-Z Oscillating Chemical Reaction of Angelica

研究了以当归为底物、硫酸锰为催化剂、溴酸钾作氧化剂、硫酸为介质的振荡反应新体系,测定了不同浓度和不同温度下当归的振荡反应图谱,得到了当归体系的反应诱导期、振荡周期及振荡寿命,并由此计算出振荡反应诱导期活化能(57.30 kJ/mol)和振荡周期平均活化能(89.04 kJ/mol);考察了添加物如酒精、绿茶、葡萄糖等对振荡行为的影响;在恒温条件下通过改变某种反应物浓度得到了该振荡反应的反应级数,并初步研究了该反应的反应机理.

This present article studied a new oscillating reaetion system with angelica as the substrate,manganese sulphate as the catalyst,potassium bromate as the oxidant and sulfuric acid as the reaction media.Oscillating wave patterns of the angelica,oscillation period as well as induction period and oscillation life varying with different consentrations and different temperatures were obtained.Furthermore,apparent activation energy in induction phase and oscillating period was determined as 57.30 kJ/mol and 89.04 kJ/mol respectively.Reaction order was figured out through changing the consentration of one substrate at each time.Also,effect of the additive such as ethanol,greentea,glucose etc was investigated in this oscillating reaection.