一类新型光化学振荡体系的研究

三个三苯甲烷类、九个变色酸双偶氮类共十二个水溶液体系中, 用HP-8451型快速扫描光度计, 在体系不搅拌、控制浓度和温度情况下, 可以记录到衰减式规整的周期振荡波。辐射开抬后出现1000s以上的振荡前置期, 振荡主期的周期为112±5s,最大振幅约为0.06A。搅拌时光化学反应为零级。本文还研究了浓度、温度和搅拌对形成光化学振荡影响, 讨论了它们的可能机制。此十二个振荡体系末见文献报道。

Studies on a kind of new photochemical oscillating system

The HP-8451 spectrophotometer was used to record the decay and regular periodic oscillation reaction in 12 aqueous solution systems which include 3 triphenylmethane dyes and 9 bisazo derivative of chromotropic acids. The optimal conditions for the reactions included; absence of stirring, certain concentration range, and ~25? The oscillations, appear >1000 s after the irradiation start. The main oscillating period is 112 ?5 s and the large amplitude is 0.06 A. The effects of concentration, temperature, and stirring on forming photochem. reaction oscillations, were studied and their possible mechanisms are discussed.