Date of Award
1994
Document Type
Thesis
Publication Status
Version of Record
Submission Date
October 2026
Thesis/Dissertation Advisor [Chair]
Parkanyi, Cyril
Abstract
The photodegradation of benzimidazole-based fungicides: benomyl ({1- [(butylamino) carbonyl)-1H-benzimidazol-2-yl} carbamic acid methyl ester), thiabendazole (2-(4-thiazolyl)-1H-benzimidazole) and fuberidazole (2-(2-furyl)-1H-benzimidazole) by ultraviolet radiation has been studied. Benomyl in an organic solvent (chloroform) undergoes a rapid degradation even without any UV radiation; UV radiation and air agitation will increase the rate of the reaction. The degradation product was found to be methyl 2-benzimidazolecarbamate (MBC) in all cases. The degradation of thiabendazole and fuberidazole in methanol was also studied under different conditions but degradation was observed only under UV radiation and in the presence of oxygen, 7-8 Photodegradation products were found in the mixture after irradiation of thiabendazole but only 2 of them were separated from the mixture and identified. Benzimidazole-2-carboxamide and dimethyl oxalate were two of the final photodegradation products of thiabendazole in methanol. It is clear that the thiazole ring is the most vulnerable part of the molecule and suffers ring cleavage. No photodegradation products of fuberidazole were identified so far.
Extent
86 p.
Recommended Citation
Chen, Dong., "Photodegradation of 2-substituted benzimidazole fungicides by ultraviolet radiation" (1994). Electronic Theses and Dissertations 1990 - 1999. 651.
https://digitalcommons.fau.edu/etd_general_4/651
Identifier
FADT15061
Comments
Thesis (M.S.)--Florida Atlantic University, 1994.|Charles E. Schmidt College of Science|FAU Electronic Theses and Dissertations Collection|Thesis (M.S.)--Florida Atlantic University, 1994.