研究论文
万海滨.有机磷农药在环境中的光稳定性及其与分子结构的关系[J].环境科学学报,1991,11(4):468-475
有机磷农药在环境中的光稳定性及其与分子结构的关系
- PHOTOSTABILITY OF ORGANOPHOSPHORUS PESTICIDES AND ITS RELATION WITH THEIR MOLECULAR STRUCTURE
- 摘要：测定了九种具不同结构特征的有机磷农药的消光系数、光量子产率和在环境中的光稳定性。探讨了分子结构与光稳定性的关系。结果表明,农药光稳定性主要取决于分子是否具有共轭结构及共轭程度大小;共轭程度愈大,农药的紫外光吸收能力愈强,光量子产率愈小。根据分子结构将有机磷农药分为六类。并以此法对30种结构较为简单的农药的光稳定性作了预测。
- Abstract：The UV extinction coeffjcjents, the quantum yields and photolysis rates of 9 organophosphorus pesticides were studied, based on which, the relation between the photolysis rates and the molecular structures of the pesticides was Investigated. It was found that the photostabilities of the pesticides depend on the conjugating extent of the molecules. Increase in conjugating extent causes an increase in UV absorption and decreased quantum yield. Commonly used organophosphorus pesticides were classified into 6 groups with different photostabilities according to their molecular structure.
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