中文摘要：

介绍了焦脱镁叶绿酸-a作为光活化农药的可能性，利用激光光解时间分辨吸收技术和自旋捕获EPR技术对其光活化机制进行了研究．研究发现，焦脱镁叶绿酸-a的光活化反应主要沿Ⅱ型即单线态氧机制进行．另外，还就单线态氧对选定的光敏氧化靶分子（DNA，亚油酸和L-色氨酸）的作用情况进行了探索．

英文摘要：

Possibility of pyrophaeophorbide-a to be a kind of photoactivated pesticide was presented. Its photoactivated mechanism was studied by use of time-resolved laser flash photolysis and spin trapped EPR technique. It is found that Type Ⅱ path （singlet oxygen） exists. And the interaction between singlet oxygen and three kinds of biological molecules （DNA, linoleic acid and L-tryptophan） was also studied.