{"title":"Catalytic oxidation of erythrosine by cobalt phthalocyanines","authors":"Toshiyuki Watanabe , Ronald D Archer","doi":"10.1016/0304-5102(94)00116-2","DOIUrl":null,"url":null,"abstract":"<div><p>Particle and solubilized cobalt(II) phthalocyanines (PCs) have been investigated for their catalytic activity on the oxidative erythrosine decomposition with hydrogen peroxide. Particle PCs show much higher activity than solubilized PCs as a result of a reaction of particle PCs with oxygen molecules that cannot take place with monomeric PCs in solution where a slower reaction with hydrogen peroxide dominates erythrosine decomposition. The high activity of particle PCs seems to be that particle PCs provide a surface where both an oxygen molecule and an erythrosine molecule can coordinate to neighboring cobalt(II) ions, and then the multinuclear cobalt(II) phthalocyanine particle can trigger the decomposition reaction by helping electron transfer from the dye to oxygen. Erythrosine decomposition with particle PCs obeyed Michaelis—Menten kinetics. The activation energies for the catalysis obtained from Arrhenius plots were significantly smaller than those without PCs, that is, particle PCs can be good catalysts for erythrosine oxidation.</p></div>","PeriodicalId":16567,"journal":{"name":"分子催化","volume":"93 3","pages":"Pages 253-267"},"PeriodicalIF":0.0000,"publicationDate":"1994-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-5102(94)00116-2","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"分子催化","FirstCategoryId":"1089","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0304510294001162","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Chemical Engineering","Score":null,"Total":0}
引用次数: 5
Abstract
Particle and solubilized cobalt(II) phthalocyanines (PCs) have been investigated for their catalytic activity on the oxidative erythrosine decomposition with hydrogen peroxide. Particle PCs show much higher activity than solubilized PCs as a result of a reaction of particle PCs with oxygen molecules that cannot take place with monomeric PCs in solution where a slower reaction with hydrogen peroxide dominates erythrosine decomposition. The high activity of particle PCs seems to be that particle PCs provide a surface where both an oxygen molecule and an erythrosine molecule can coordinate to neighboring cobalt(II) ions, and then the multinuclear cobalt(II) phthalocyanine particle can trigger the decomposition reaction by helping electron transfer from the dye to oxygen. Erythrosine decomposition with particle PCs obeyed Michaelis—Menten kinetics. The activation energies for the catalysis obtained from Arrhenius plots were significantly smaller than those without PCs, that is, particle PCs can be good catalysts for erythrosine oxidation.
期刊介绍:
Journal of Molecular Catalysis (China) is a bimonthly journal, founded in 1987. It is a bimonthly journal, founded in 1987, sponsored by Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, under the supervision of Chinese Academy of Sciences, and published by Science Publishing House, which is a scholarly journal openly circulated both at home and abroad. The journal mainly reports the latest progress and research results on molecular catalysis. It contains academic papers, research briefs, research reports and progress reviews. The content focuses on coordination catalysis, enzyme catalysis, light-ribbed catalysis, stereochemistry in catalysis, catalytic reaction mechanism and kinetics, the study of catalyst surface states and the application of quantum chemistry in catalysis. We also provide contributions on the activation, deactivation and regeneration of homogeneous catalysts, solidified homogeneous catalysts and solidified enzyme catalysts in industrial catalytic processes, as well as on the optimisation and characterisation of catalysts for new catalytic processes.
The main target readers are scientists and postgraduates working in catalysis in research institutes, industrial and mining enterprises, as well as teachers and students of chemistry and chemical engineering departments in colleges and universities. Contributions from related professionals are welcome.