KINETICS AND MECHANISM OF OXIDATION OF 4-(PHENYLAZO)DIPHENYLAMINE WITH PEROXYDISULFATE

Authors
SALEM MA ZAKI AB ISMAIL AA ELSHEIKH MY
Citation
Ma. Salem et al., KINETICS AND MECHANISM OF OXIDATION OF 4-(PHENYLAZO)DIPHENYLAMINE WITH PEROXYDISULFATE, Zeitschrift für physikalische Chemie, 192, 1995, pp. 87-99
Citations number
14
Categorie Soggetti
Chemistry Physical","Physics, Atomic, Molecular & Chemical
Journal title
Zeitschrift für physikalische Chemie → ACNP
ISSN journal
09429352
Volume
192
Year of publication
1995
Part
1
Pages
87 - 99
Database
ISI
SICI code
0942-9352(1995)192:<87:KAMOOO>2.0.ZU;2-1
Abstract
Oxidation of 4-(phenylazo)diphenylamine (PDA) by peroxydisulphate is f irst order in each one of the reactants. With Ag+ as catalyst, it is f irst order in the oxidant and catalyst, and zero order in the substrat e concentration. In the presence of anionic micelles of sodium dodecyl sulphate the reaction rate is enhanced and then inhibited. In a medium containing mixed anionic and cationic (cetyltrimethyl ammonium bromid e-) micelles a depression in the oxidation rate occurs. The effects of radical scavenger and ionic strength are examined, and mechanisms acc ount for the reaction are discussed.