| S-茚虫威的晶型研究及杀虫活性比较 |
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| 引用本文： | 程敬丽,肖豆鑫,郑敏,赵金浩.S-茚虫威的晶型研究及杀虫活性比较[J].农药学学报,2018,20(3):294-300. |
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| 作者姓名： | 程敬丽 肖豆鑫 郑敏 赵金浩 |
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| 作者单位： | 浙江大学 农业部作物病虫分子生物学重点实验室，农药与环境毒理研究所，杭州 310029 |
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| 基金项目： | 国家重点研发计划项目（2016YFD0200804，2017YFD0200505）；浙江大学实验技术研究项目（SJS201710） |
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| 摘 要： | 为了研究S-茚虫威的多晶型现象，寻找对杀虫有效的优势晶型，采用溶剂结晶法 (异丙醇、乙醇) 制备得到S-茚虫威的一种新晶型A，并首次获得了其单晶结构；采用熔融法制备得到其无定型形式，通过X射线粉末衍射 (PXRD)、差示扫描量热分析 (DSC)、热重分析 (TGA) 及傅里叶变换红外光谱分析 (FTIR) 等技术对不同晶型结构进行了表征。进一步制备了S-茚虫威不同晶型的15%悬浮剂，并对其杀虫活性进行了对比研究。结果表明:S-茚虫威存在两种不同的晶型状态——晶型A和无定型形式，其15%无定型悬浮剂对二化螟Chilo suppressalis (Walker) 和小菜蛾Plutella xyllostella (L.) 杀虫活性显著高于其15%晶型A悬浮剂。本研究证实了S-茚虫威存在多晶型状态，且无定型形式为其活性优势晶型。
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| 关 键 词： | S-茚虫威 晶型A 无定型 单晶 杀虫活性 多晶型研究 |
| 收稿时间： | 2018/2/3 0:00:00 |
Polymorphism of S-indoxacarb and its impact on insecticide activity |
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| CHENG Jingli,XIAO Douxin,ZHENG Min and ZHAO Jinhao.Polymorphism of S-indoxacarb and its impact on insecticide activity[J].Chinese Journal of Pesticide Science,2018,20(3):294-300. |
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| Authors: | CHENG Jingli XIAO Douxin ZHENG Min and ZHAO Jinhao |
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| Institution: | Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310029, China |
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| Abstract: | In this study, the polymorphism of S-indoxacarb was investigated to find the preponderant polymorph with the best insecticide activity. A novel S-indoxacarb polymorph form A was prepared by crystallization (isopropanol, ethanol). And amorphous form was also prepared by melting method. Polymorphs of S-indoxacarb characterized by powder XRD, TGA, DSC and FTIR spectra. 15% Suspension concentrate (SC) of S-indoxacarb form A and amorphous form were prepared, and their insecticide activities against Plutella xyllostella (L.), Chilo suppressalis (Walker) were evaluated. The results showed the amorphous forms exhibited higher insecticide activity than that of polymorph A. This study confirms that S-indoxacarb has a polymorphic state and the amorphous form show better insecticide activity. |
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| Keywords: | S-indoxacarb polymorph A amorphous form monocrystal insecticide activity polymorphism study |
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