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篇名
Photodegradation of Dialkyl 1,3-Dithiolan-2-ylidenemalonates and Some Other Pesticides on Solid Particles
作者 Shin-Shou Chou (Shin-Shou Chou)Eiji Taniguchi (Eiji Taniguchi)Morifusa Eto (Morifusa Eto)
英文摘要
On irradiation with UV light the fungicide isoprothiolane (diisopropyl 1, 3-dithiolan-2-ylidenemalonate) decomposed rapidly on the silica gel surface. The degradation pathways involved dithiolane ring cleavage, ester hydrolysis, decarboxylation, heterocycles formation such as dithietane and trithiolane, and sulfur liberation. The photoproducts confirmed were oxalic acid, dithiolanylidenemalonic acid, dithiolanylideneacetic acid, 2,4-bis[bis(isopropoxycarbonly) methylene]-1, 3-dithietane, 3, 5-bis[bis(iospropoxy-carbonyl)methylene]-1,2,4-trithiolane and sulfur. The methyl and ethyl homologs of isoprothiolane similarly gave the corresponding photoproducts. The surface area where isoprothiolane was placed appeared to be related closely with the photolysis rate. Isoprothiolane decomposed much more rapidly on sand than on a glass plate. The surface effect was greatly depressed under nitrogen atmosphere. Similar phenomena were observed with some other pesticides, with particularly those containing sulfur atoms in the molecule.
起訖頁 167-175
刊名 藥物食品檢驗局調查研究年報  
期數 1982 (1期)
出版單位 衛生福利部食品藥物管理署
該期刊-上一篇 Photolysis of Diisopropyl 1,3-Dithiolan-2-ylidenemalonate,Isoprothiolane Fungicide
該期刊-下一篇 Systematic Analysis of Antibiotics via Agar Gel Electrophoresis and Antimicrobial Spectrum Candidacy for Detecting Residual Antibiotics in Foods
 

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