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Photochemistry of the pesticide azinphos methyl and its model molecule 1,2,3-benzotriazin-4(3H)-one in aqueous solutions: Kinetic and analytical studies

Paper ID Volume ID Publish Year Pages File Format Full-Text
27957 44052 2007 8 PDF Available
Title
Photochemistry of the pesticide azinphos methyl and its model molecule 1,2,3-benzotriazin-4(3H)-one in aqueous solutions: Kinetic and analytical studies
Abstract

The photodegradation of the organophosphorus pesticide azinphos methyl and 1,2,3-benzotriazin-4(3H)-one in aqueous solutions with excitation within the wavelength range 254–313 nm was studied. For both compounds, the degradation depended on the excitation wavelength: the quantum yield decreased with decreasing the excitation energy.The analysis of the irradiated solution of azinphos methyl revealed the presence of several products. 1,2,3-Benzotriazin-4(3H)-one was shown to be the major product accounting for roughly 50% of azinphos methyl conversion. Such product led in its turn to an efficient formation of anthralinic acid via the formation of an iminoketene derivative. Detailed mechanisms for the formation of the primary products from both azinphos methyl and 1,2,3-benzotriazin-4(3H)-one are proposed and discussed.

Keywords
Organophosphorus; Azinphos methyl; Photolysis; 1,2,3-Benzotriazin-4(3H)-one; Iminoketene; Anthranilic acid
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Photochemistry of the pesticide azinphos methyl and its model molecule 1,2,3-benzotriazin-4(3H)-one in aqueous solutions: Kinetic and analytical studies
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 192, Issue 1, 15 November 2007, Pages 41–48
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us