Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
J Hazard Mater. 2009 Dec 15;172(1):390-4. doi: 10.1016/j.jhazmat.2009.07.020. Epub 2009 Jul 14.
The ozonation of trifluralin coated on azelaic acid particles is investigated with a vacuum ultraviolet photoionization aerosol time-of-flight mass spectrometer. The suspended trifluralin particles with the mean diameter of 270nm react with approximately 100ppm ozone in an aerosol reaction chamber under ambient pressure and room temperature (1atm, 298K). The time-of-flight mass spectra of the trifluralin particles and the solid state ozonides are obtained. The assignments of the mass spectra reveal that the major primary ozonides of trifluralin particles are 2,6-dinitro-N-propyl-N-propanoyl-4-(trifluoromethyl) benzamine and 2,6-dinitro-N-(propan-2(and 3)-ol)-N-propyl-4-(trifluoromethyl) benzamine. The major secondary ozonides of trifluralin 2-ethyl-7-nitro-5-(trifluoromethyl) benzimidazole-3-oxide, 2,6-dinitro-N-propyl-4-(trifluoromethyl) benzenamine and 2,6-dinitro-N-(formyl)-N-propyl-4-(trifluoromethyl) benzamine are observed. The primary ozonides are directly resulted from the oxidation of N-propyl groups. The pathways of the primary ozonation are proposed in the paper.
采用真空紫外光电离气溶胶飞行时间质谱仪研究了三氟隆包覆在壬二酸颗粒上的臭氧化反应。在气溶胶反应室内，在环境压力和室温（1atm，298K）下，将平均直径为 270nm 的悬浮三氟隆颗粒与约 100ppm 的臭氧反应。得到了三氟隆颗粒和固态臭氧化物的飞行时间质谱。质谱的分配揭示了三氟隆颗粒的主要初级臭氧化物是 2,6-二硝基-N-丙基-N-丙酰基-4-(三氟甲基)苯甲胺和 2,6-二硝基-N-(丙烷-2(和 3)-醇)-N-丙基-4-(三氟甲基)苯甲胺。三氟隆的主要次级臭氧化物为 2-乙基-7-硝基-5-(三氟甲基)苯并咪唑-3-氧化物、2,6-二硝基-N-丙基-4-(三氟甲基)苯甲胺和 2,6-二硝基-N-(甲酰基)-N-丙基-4-(三氟甲基)苯甲胺。初级臭氧化物是直接由 N-丙基氧化产生的。本文提出了初级臭氧化的途径。
