物理化学学报 >> 1993, Vol. 9 >> Issue (02): 218-223.doi: 10.3866/PKU.WHXB19930214

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间二苯酚-KBrO3-H2SO4体系化学振荡的研究

高执棣; 刘君利; 韩德刚; 申世刚; 王安周   

  1. 北京大学化学系，北京 100871；河北大学化学系，保定 071002
  • 收稿日期:1991-10-07 修回日期:1992-07-17 发布日期:1993-04-15
  • 通讯作者: 高执棣

Studies on the Oscillation of m-C6H4(OH)2-KBrO3-H2SO4 System

Gao Zhi-Di; Liu Jun-Li; Han De-Gang; Shen Shi-Gang; Wang An-Zhou   

  1. Department of Chemistry, Peking University, Beijing 100871; Department of Chemistry, Hebei University, Baoding 071002
  • Received:1991-10-07 Revised:1992-07-17 Published:1993-04-15
  • Contact: Gao Zhi-Di

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摘要： 用电位法研究了间苯二酚-KBrO_3-H_2SO_4(体系A)及间苯二酚-KBrO_3-H_2SO_4-MnSO_4(体系B)的化学振荡现象. 得出了两振荡体系的诱导期及振荡周期与反应物起始浓度及温度关系的经验方程.间苯二酚在诱导期结束时全被氧化, 它不是参与振荡的物质.
体系B在低Mn~(2+)浓度下可呈现双振荡现象, 即第一类振荡结束后, 经一段非振荡时间再产生第二类振荡. 两类振荡的特征不同. 第一类振荡与体系A的振荡行为基本相似. 第二类振荡的各个周期随c_M 减小而缩短,最后趋于相同; 随c_K、c_H增大而减小, 最后各自趋于一致. 但周期与c_R基本无关. 第二类振荡出现周期双单调变化现象, 它补充与支持了文献[1]中的提法. 当Mn~(2+)浓度增高到一定程度后, 双振荡现象消失, 仅产生一种振荡. 体系B是产生双振荡现象的典型事例之一.

关键词: 化学振荡, 诱导期, 振荡周期, 周期双单调现象, 双振荡

Abstract: The oscillations of m-C_6H_4(OH)_2-KBrO_3-H_2SO_4 (system A) as well as m-C_6H_4(OH)_2-KBrO_3-H_2SO_4-MnSO_4(system B) have been studied. The relations between induction period as well as oscillating period and the initial concentrations of reactants as well as temperatures of the system have been determined experimentally.
With low concentrations of Mn~(2+), system B exhibits two types of oscillation phenomena, ie, after the first type of oscillation and through a certain time interval, a second type of oscillation occurs. The characteristics of the two types of oscillation are different. The oscillating behavior of the first type of oscillation is similar to that of system A. The second type of oscillation may exhibit period-double-monotonous phenomena, which supports the idea in reference[1]. With higher concentrations of Mn~(2+), the second type of oscillation disappears and the system exhibit only one oscillation. System B is one of the typical examples showing the two types of oscillations.

Key words: Chemical oscillation, Induction period, Oscillting period, Period-double-monotonous phenomena, Bi-oscillation