Oscillating chemiluminescence in rhodamine B-induced Belousov-Zhabotinsky reaction catalyzed by Ce(Ⅳ)  

作　　者：DUAN ChunFeng LIU GuangMing ZHANG ZhiFeng CUI Hua 

机构地区：[1]Department of Chemistry, University of Science and Technology of China, Hefei 230026, China

出　　处：《Chinese Science Bulletin》2009年第11期1901-1907,共7页

基　　金：Supported by the Overseas Outstanding Young Scientist Program of Chinese Acad-emy of Sciences ;the National Natural Science Foundation of China (Grant No. 20625517)

摘　　要：It was found that rhodamine B could induce oscillating chemiluminescence (OCL) from the Ce4+-cata-lyzed Belousov-Zhabotinsky reaction. This new OCL system, i.e., rhodamine B-malonic acid-bromate-Ce(Ⅳ)-sulfuric acid, exhibited two clearly distinguished emission peaks in each oscillation period. The initial concentrations of the reactants strongly influenced the oscillation pattern. For the study of the CL mechanism, a platform for a versatile and simultaneous potential and CL measurement was estab-lished to compare the potential oscillation with the CL oscillation behavior of this system. The CL spectra, UV-visible absorption spectra and time-resolved fluorescence spectra of this OCL system were studied. A possible, simplified mechanism for the OCL is proposed. It is suggested that the generation of the two CL peaks is likely due to the oxidation of the intermediate of rhodamine B by Ce(Ⅳ) and Br2, respectively. This work provided a new method and platform to research the complex chemical oscilla-tions.It was found that rhodamine B could induce oscillating chemiluminescence （OCL） from the Ce4＋-catalyzed Belousov-Zhabotinsky reaction. This new OCL system, i.e., rhodamine B-malonic acid-bromate- Ce（IV）-sulfuric acid, exhibited two clearly distinguished emission peaks in each oscillation period. The initial concentrations of the reactants strongly influenced the oscillation pattern. For the study of the CL mechanism, a platform for a versatile and simultaneous potential and CL measurement was estab- lished to compare the potential oscillation with the CL oscillation behavior of this system. The CL spectra, UV-visible absorption spectra and time-resolved fluorescence spectra of this OCL system were studied. A possible, simplified mechanism for the OCL is proposed. It is suggested that the generation of the two CL peaks is likely due to the oxidation of the intermediate of rhodamine B by Ce（IV） and Br2, respectively. This work provided a new method and platform to research the complex chemical oscilla- tions.

关 键 词：罗丹明B 振荡周期 化学发光 反应 诱导 催化 时间分辨荧光光谱 紫外可见吸收光谱 

分 类 号：O614.121[理学—无机化学] P433[理学—化学]