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|Title:||Photooxidation of diphenylamine in micellar media|
|Authors:||Gupta, P K|
Dahrniwal, N R
|Abstract:||Photosensitized oxidation of diphenylamine (DPA) with methylene blue as sensitizer in sodium dodecyl sulphate, cetyltrimethyl ammonium bromide and Brij-35 micellar solutions in aqueous alcoholic media gives N-phenyl-p-benzoquinoneimine as the product. The initial decrease in rate in the presence of surfactants has been explained through the deactivation of singlet dye resulting in lower concentration of the reactive triplet dye. A mechanism suggesting the involvement of 1O2 and electron transfer pathways is suggested in the presence of anionic, cationic and neutral surfactants. The effect of singlet oxygen quenchers has been studied at low substrate concentration.|
|Appears in Collections:||IJC-A Vol.33A(08) [August 1994]|
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