Kinetic Studies of the Oxidationof Coumarin-540 Laser Dye

Autor:	Hosny A. El-Daly, Ali H. Gemeay, Tarek A. Fayed
Rok vydání:	2000
Předmět:	Solvent chemistry.chemical_compound Electron transfer Reaction rate constant Chemistry Hydrogen bond Diffusion Kinetics Halomethane General Chemistry Photochemistry Catalysis
Zdroj:	Monatshefte fuer Chemie/Chemical Monthly. 131:749-759
ISSN:	0026-9247
DOI:	10.1007/s007060070076
Popis:	3-(2-Benzothiazolyl)-7-diethylaminocoumarin (C-540) has been irradiated at 254 nm in halomethane solvents, and the first order rate constant of the photo-oxidation reaction was determined. The hydrogen bond donation of the solvents plays a substantial role in controlling the rate of formation of the photoproduct. The linearity of the isokinetic relationship supports the similarity of the mechanism in all solvents and emphasizes that the activation process is controlled by diffusion of dye into the solvent cage. Moreover, the chemical oxidation of C-540 with peroxodisulfate anion catalyzed by Ag+ ions has been studied. The reaction follows second-order kinetics, first order for each individual reactant.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5e67e9fff68a454897c5ccd6f7cf90e3 https://doi.org/10.1007/s007060070076 Zobrazit plný text záznamu Full text from SpringerLink