MnO2 and TiO2 Catalyzed the Hydrolysis of Quinalphos

Authors

  • Esbata A1*, Buncel E2, W. vanLoon G2 1 Department of Chemistry, Misurata University, Misurata, Libya 2 Department of Chemistry, Queen’s University, Kingston, Ontario, Canada

Abstract

Hydrolysis of the organophosphorothioate ester, quinalphos (Q, O,O-diethyl O-quinoxaline-2-yl phosphorothioate) was investigated in the absence and presence of either MnO2 or TiO2 (heterogeneous catalysis) at 25oC and pH 4.0, 7.0, and 10.0. The hydrolysis products were 2-hydroxyquinoxaline (HQ) and O,O-diethyl phosphorothioic acid (PA). Hydrolysis of quinalphos was studied by determining the disappearance of Q as well as appearance of HQ product using HPLC with UV detection. At these pH values, MnO2 was found to exert a significant catalytic effect. TiO2 also facilitated the hydrolysis of Q, but only to a small extent..

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Published

2017-12-30

How to Cite

1.
Esbata A1*, Buncel E2, W. vanLoon G2. MnO2 and TiO2 Catalyzed the Hydrolysis of Quinalphos. Alq J Med App Sci [Internet]. 2017 Dec. 30 [cited 2024 Apr. 27];1(2):20-8. Available from: https://journal.utripoli.edu.ly/index.php/Alqalam/article/view/123

Issue

Volume 1, Issue 2, 2017

Section

Articles