目的筛选具有优良击倒和致死性能的气雾杀虫剂三元复配配方。方法玻璃瓶药膜法。结果当胺菊酯与富右旋反式烯丙菊酯进行复配筛选时，配比范围在1∶0.625-1∶1.2的9个配比，其KT50的共毒系数大于120，表现显著增效作用。结合全倒时间、...目的筛选具有优良击倒和致死性能的气雾杀虫剂三元复配配方。方法玻璃瓶药膜法。结果当胺菊酯与富右旋反式烯丙菊酯进行复配筛选时，配比范围在1∶0.625-1∶1.2的9个配比，其KT50的共毒系数大于120，表现显著增效作用。结合全倒时间、实际可能使用剂量等指标，选择了胺菊酯与富右旋反式烯丙菊酯的2.5＋2、3＋2.5、3.5＋1.5等3个击倒剂组合，用来筛选致死剂。每组合与氯氰菊酯不同剂量进行复配筛选表明：15个组合均有良好的击倒性和致死性，KT50范围为2.94-3.90 m in，24 h死亡率范围为72.14%-98.75%。结论以KT50的共毒系数和24 h死亡率的增效效果来综合评价，选择了胺菊酯、富右旋反式烯丙菊酯、氯氰菊酯以2.5＋2.0＋2.0、2.5＋2.0＋2.5、3.0＋2.5＋2.5、3.0＋2.5＋3.0、3.5＋1.5＋2.5、3.5＋1.5＋2.5等6个三元复配组合供开发选择。展开更多
The theoretical calculation and spectroscopic experiments indicate a kind of triangular three bonding supramolecular complexes CBr4…X^-…-H-C, which consist of carbon tetrabromide, halide, and protic solvent molecule...The theoretical calculation and spectroscopic experiments indicate a kind of triangular three bonding supramolecular complexes CBr4…X^-…-H-C, which consist of carbon tetrabromide, halide, and protic solvent molecule （referring to dichloromethane, chloroform and acetonitrile）, can be formed in solution. The strength of halogen and hydrogen bonds in the triangular complexes using halide as common acceptor obeys the order of iodide〉bromide〉chloride. The halogen and hydrogen bonds work weak-cooperatively. Charge transfer bands of halogen bonding complexes between CBra and halide are observed in UV-Vis absorption spectroscopy in three solvents, and then the stoichiometry of 1：1, formation constants K and molar extinction coefficients ε of the halogen bonding complexes are obtained by Benesi-Hildebrand method. The K and ε show a dependence on the solvent dielectric constant and, on the whole, obey an order of iodide〉bromide〉chloride in the same solvents. Furthermore, the C-H vibrational frequencies of solvent molecules vary obviously with the addition of halide, which indicates the C-H…X- interaction. The experimental data indicate that the halogen bond and hydrogen bond coexist by sharing a common halide acceptor as predicted by calculation.展开更多
文摘目的筛选具有优良击倒和致死性能的气雾杀虫剂三元复配配方。方法玻璃瓶药膜法。结果当胺菊酯与富右旋反式烯丙菊酯进行复配筛选时，配比范围在1∶0.625-1∶1.2的9个配比，其KT50的共毒系数大于120，表现显著增效作用。结合全倒时间、实际可能使用剂量等指标，选择了胺菊酯与富右旋反式烯丙菊酯的2.5＋2、3＋2.5、3.5＋1.5等3个击倒剂组合，用来筛选致死剂。每组合与氯氰菊酯不同剂量进行复配筛选表明：15个组合均有良好的击倒性和致死性，KT50范围为2.94-3.90 m in，24 h死亡率范围为72.14%-98.75%。结论以KT50的共毒系数和24 h死亡率的增效效果来综合评价，选择了胺菊酯、富右旋反式烯丙菊酯、氯氰菊酯以2.5＋2.0＋2.0、2.5＋2.0＋2.5、3.0＋2.5＋2.5、3.0＋2.5＋3.0、3.5＋1.5＋2.5、3.5＋1.5＋2.5等6个三元复配组合供开发选择。
基金ACKNOWLEDGMENTS This work was supported by the National Natural Science Foundation of China （No.20675009 and No. 90922023）. The basis set aug-cc-pVDZ-PP for iodine atom is downloaded at the website http：//bse.pnl.gov/ bse/portal.
文摘The theoretical calculation and spectroscopic experiments indicate a kind of triangular three bonding supramolecular complexes CBr4…X^-…-H-C, which consist of carbon tetrabromide, halide, and protic solvent molecule （referring to dichloromethane, chloroform and acetonitrile）, can be formed in solution. The strength of halogen and hydrogen bonds in the triangular complexes using halide as common acceptor obeys the order of iodide〉bromide〉chloride. The halogen and hydrogen bonds work weak-cooperatively. Charge transfer bands of halogen bonding complexes between CBra and halide are observed in UV-Vis absorption spectroscopy in three solvents, and then the stoichiometry of 1：1, formation constants K and molar extinction coefficients ε of the halogen bonding complexes are obtained by Benesi-Hildebrand method. The K and ε show a dependence on the solvent dielectric constant and, on the whole, obey an order of iodide〉bromide〉chloride in the same solvents. Furthermore, the C-H vibrational frequencies of solvent molecules vary obviously with the addition of halide, which indicates the C-H…X- interaction. The experimental data indicate that the halogen bond and hydrogen bond coexist by sharing a common halide acceptor as predicted by calculation.
