生态与农村环境学报 ›› 2009, Vol. 25 ›› Issue (2): 103-106.doi: CNKI:SUN:NCST.0.2009-02-027

• 论文 • 上一篇    下一篇

烯式吡虫啉(olefin IMI)光解及其光解产物研究

葛峰, 单正军, 戴亦军, 陈婷, 袁生   

  1. 环境保护部南京环境科学研究所
  • 收稿日期:2008-12-16 出版日期:2009-04-25 发布日期:2011-04-08
  • 通讯作者: 戴亦军 南京师范大学生命科学学院 E-mail:daiyijun90@yahoo.com.cn
  • 作者简介:葛峰(1981-),男,江苏扬中人,硕士,主要从事农药环境行为研究。E-mail:gf@nies.org
  • 基金资助:

    环境保护部环保公益性行业专项(200809092)

Photolysis of Olefin IMI and Its Photolytic Products

GE  Feng, SHAN  Zheng-Jun, DAI  Yi-Jun, CHEN  Ting, YUAN  Sheng   

  1. Nanjing Institute of Environmental Science,Ministry of Environmental Protection
  • Received:2008-12-16 Online:2009-04-25 Published:2011-04-08
  • Contact: DAI Yi-Jun College of Life Science,Nanjing Normal University E-mail:daiyijun90@yahoo.com.cn

摘要: 烟碱类杀虫剂吡虫啉(imidacloprid,IMI)在环境中可代谢为生物活性提高10倍的烯式吡虫啉(olefin IMI)。研究了olefin IMI的光稳定性、光解动力学和光解代谢途径。结果表明:olefin IMI在避光条件下较为稳定,室温下放置400d后,olefin IMI含量仅减少3%;而在室内模拟日光条件下,olefin IMI易于分解,光解反应符合一级动力学方程(r>0.99),半衰期为4d。olefin IMI的光解反应存在2条主要途径:一是羟基化生成4,5-二羟基化吡虫啉,该产物进一步氧化断裂药效基团硝基亚胺基生成羰基化产物;二是直接脱去硝基基团生成胍基产物。

关键词: 烯式吡虫啉(olefin IMI), 光解, 代谢途径

Abstract: A study was done on photic stability,photolytic dynamics and pathway of photolytic metabolism of olefin IMI.Results show that olefin IMI was stable in darkness.It decreased by 3% in concentration after having been kept in room temperature and darkness for 400 days.However in the laboratory under simulated sunlight,olefin IMI was unstable and easily degraded.Its photolytic reaction fitted the first-order kinetic equation(r>0.99),and its half life was figured out to be 4 days.Its photolytic reaction followed two pathways,either through hydroxylation into 4,5-dihydroxy IMI,which is oxidized,breaking its nitroimine pharmacophore and turned into carbonyl product,or through formation of guanidine metabolites by breaking off nitroimine group.

Key words: olefin IMI, photolysis, photolytic product

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