Ozonation of neat sunflower oil (SFO) methyl esters was monitored by FT-IR and 1H and 13C NMR spectroscopy. During the early stage of ozonation, ozone absorption was essentially quantitative. This was accompanied by the formation of 1,2,4-trioxolane. IR and NMR spectra of ozonated samples showed that scission of ozonide to give aldehyde were minimal. 1H NMR analysis revealed that the amount of ozonide relative to aldehyde was more than 90% regardless of the extent of ozonation. Complete ozonation was attained after supplying around 0.20 g O3/ml methyl ester after which ozone absorption suddenly dropped to around 25%. At the latter part of ozonation, ozonide and aldehyde reacted with excess ozone to give carboxylic acid. Reaction products were identified according to Criegee mechanism.

中文翻译：

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通过FT-IR和NMR对向日葵油甲酯进行臭氧化过程中的官能团分析。

通过FT-IR和1H和13C NMR光谱监测纯向日葵油（SFO）甲酯的臭氧化。在臭氧化的早期阶段，臭氧吸收基本上是定量的。这伴随着1,2,4-三氧戊环的形成。臭氧化样品的红外和核磁共振光谱表明，臭氧分解产生醛的可能性很小。1H NMR分析表明，相对于醛而言，臭氧化物的量大于90％，而与臭氧化程度无关。加入约0.20 g O3 / ml甲酯后，可实现完全臭氧氧化，之后臭氧吸收率突然降至约25％。在臭氧化的后期，臭氧化物和醛与过量的臭氧反应生成羧酸。根据克里基机理鉴定反应产物。