Chemical oscillations in the metal ion-catalyzed bromate-4-aminophenol reaction  

作　　者：HARATI Mohammad LI Nan 

机构地区：[1]Department of Chemistry and Biochemistry, University of Windsor, Ontario N9B 3P4, Canada [2]School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China

出　　处：《Science China Chemistry》2012年第9期1916-1921,共6页中国科学（化学英文版）

基　　金：supported by the Natural Science and Engineering Research Council (NSERC),Canada,the National Natural Science Foundation ofChina (21003010);the Doctoral Fund of the Ministry of Education of China (20101101120032);the China Postdoctoral Science Foundation(20100470558);the Excellent Young Scholars Research Fund of Beijing Institute of Technology (2009 Y1017)

摘　　要：Temporal oscillations of the bromate-4-aminophenol system have been studied in the presence of four different catalysts： tris（1,10-phenanthroline）iron（Ⅱ） sulfate （ferroin）, Ce（Ⅲ）, Mn（Ⅱ）, and Fe（Ⅱ）. Transient temporal oscillations were observed in the four catalyzed systems when the reactions were conducted in a stirred batch reactor. The induction time was prolonged by the presence of ferroin, but it was shortened in the Ce（Ⅲ）- and Mn（Ⅱ）-catalyzed systems. On the other hand, the number of peaks was significantly decreased in the presence of ferroin. The development of oscillatory behaviour was found to be more sensitive to the ratio of bromate and 4-aminophenol concentration than to their absolute concentrations. The reaction rates of 4-aminophenol with Ce（IV） and 4-aminophenol with ferritin were measured directly by spectroscopic methods in a sulfuric acid medium.Temporal oscillations of the bromate-4-aminophenol system have been studied in the presence of four different catalysts:tris(1,10-phenanthroline)iron(II) sulfate(ferroin),Ce(III),Mn(II),and Fe(II).Transient temporal oscillations were observed in the four catalyzed systems when the reactions were conducted in a stirred batch reactor.The induction time was prolonged by the presence of ferroin,but it was shortened in the Ce(III)-and Mn(II)-catalyzed systems.On the other hand,the number of peaks was significantly decreased in the presence of ferroin.The development of oscillatory behaviour was found to be more sensitive to the ratio of bromate and 4-aminophenol concentration than to their absolute concentrations.The reaction rates of 4-aminophenol with Ce(IV) and 4-aminophenol with ferritin were measured directly by spectroscopic methods in a sulfuric acid medium.

关 键 词：chemical oscillations bromate-aminophenol system nonlinear dynamics SPECTROSCOPY 

分 类 号：O643.32[理学—物理化学]