Analysis of Oscillation Reaction induced by Vanadium Complex-Identification of Trigger and Cycle Reactions

振荡反应一般发生在含有氧化剂、还原剂、底物、金属催化剂和酸的复杂体系中。然而，我们首次在二氯甲烷中发现了一种独特的只含钒配合物的振荡体系。为了弄清楚这个有趣的现象，我们使用了多种方法对系统进行了调查，最终发现了以下有趣的结果：振荡反应只发生在[V(IV) OCl_2(bpy)]或[V(III) Cl_3(CH_3CN)(bpy)]的二氯甲烷溶液中。振荡反应不发生在任何相关的卤甲烷溶剂，如氯仿和二氯乙烷。2. 在一定温度下，振荡反应是非周期性的。然而，当温度脉冲作用于溶液时，振荡开始跟随脉冲，导致周期性行为。3. 二氯甲烷的光降解引发振荡反应，分解反应中产生的过氧自由基起氧化剂作用。4. 观察到的振荡反应可以用钴酸盐模型进行数学模拟。

Generally oscillation reaction occurs in a complex system containing oxidant, reductant, substrate, metal catalyst, and acid. However, we found at first time a unique oscillation system in dichloromethane which contains only vanadium complex. In order to make clear this interesting phenomenon, we investigated the system using a variety of methods and finally found the following interesting results : 1. The oscillation reaction occurs only in dichlromethane solution of[ V(IV) OCl_2(bpy)] or[ V(III) Cl_3(CH_3CN)(bpy)]. The oscillation reaction does not occur in any related halomethane solvent such as chloroform and dichloroethane. 2. The oscillation reaction was found to be aperiodic at a constant temperature. However, when the temperature pulse was applied to the solution, the oscillation become to follow the pulse, resulting in a periodic behavior. 3. Photo-degradation of dichloromethane triggers the oscillation reaction and peroxy-radical species generated in the decomposition reaction works as an oxidant. 4. The observed oscillation reaction can be simulated mathematically in terms of the Cobaltlater model.