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发现罗丹明B可诱导经典的铈离子催化的Belousov-Zhabotinsky(BZ)反应,产生振荡的化学发光.这一新化学发光振荡体系,即罗丹明B-丙二酸-溴酸钾-硫酸铈铵-硫酸化学振荡体系,具有明显的双峰振荡特点.反应物的初始浓度对振荡图形有显著的影响.为了研究化学发光峰产生的机理,构建了一个通用型电压和发光同时检测的实验平台,将该体系的电压振荡图形与发光振荡图形进行了对照.根据化学发光光谱、紫外可见吸收光谱和时间分辨荧光光谱的研究结果,提出了一个可能的化学发光机理.初步认为两个发光峰分别与Ce(Ⅳ)和Br2氧化罗丹明B的中间产物有关.本工作为复杂的化学振荡反应提供了一个新的研究技术和方法.
Rhodamine B was found to induce classical Cerium ion-catalyzed Belousov-Zhabotinsky (BZ) reactions to produce oscillating chemiluminescence. This new chemiluminescence system, rhodamine B-malonate-potassium bromate-ceric ammonium sulfate-sulfuric acid Chemical oscillation system with obvious bimodal oscillation.The initial concentration of reactant has a significant influence on the oscillation pattern.In order to study the mechanism of chemiluminescence peak, a universal experimental platform for simultaneous detection of voltage and luminescence was built, According to the results of chemiluminescence, UV-Vis absorption spectra and time-resolved fluorescence spectra, a possible chemiluminescence mechanism is proposed.It is preliminarily considered that the two luminescence peaks are closely related to the emission spectra of Ce ( Ⅳ) is related to the intermediate product of Br2 oxidation of rhodamine B. This work provides a new research technique and method for the complex chemical oscillation reaction.