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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Organosulfate and Nitrate Formation and Reactivity from Epoxides Derived from 2-Methyl-3-buten-2-ol
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Organosulfate and Nitrate Formation and Reactivity from Epoxides Derived from 2-Methyl-3-buten-2-ol

机译：2-甲基-3-丁烯-2-醇衍生的环氧化物形成的有机硫酸盐和硝酸盐及其反应性

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摘要

Recent work has suggested that 2-methyl-3-butene-2-ol (MBO)-derived epoxide intermediates are responsible for some of the molecular species commonly found in ambient secondary organic aerosol (SOA). Nuclear magnetic resonance techniques were used to study the reaction kinetics and products of two potential MBO-derived epoxides under acidic solution conditions in the presence of sulfate and nitrate nucleophiles. These epoxides were found to undergo reasonably fast acid-catalyzed reaction at typical SOA acidities and to produce a variety of organosulfate and nitrate species. This finding supports a previous supposition that 3-methylbutane-1,2,3-triol and at least some of the MBO-derived organosulfates previously detected on SOA are formed from the reactions of these epoxides. In general, the particular MBO-derived organosulfates and nitrates produced from MBO-derived epoxides and their respective stability toward hydrolysis were similar to those found for isoprene-derived epoxides; the nucleophilic reactions were observed to be quite regiospecific, and the tertiary addition product species were found to hydrolyze on atmospherically relevant time scales.
机译：最近的工作表明，2-甲基-3-丁烯-2-醇（MBO）衍生的环氧化物中间体是环境次级有机气溶胶（SOA）中常见的某些分子种类的原因。核磁共振技术用于研究硫酸盐和硝酸盐亲核试剂在酸性溶液条件下两种潜在的MBO衍生的环氧化物的反应动力学和产物。发现这些环氧化物在典型的SOA酸度下会发生相当快的酸催化反应，并产生各种有机硫酸盐和硝酸盐。该发现支持先前的假设，即先前在SOA上检测到的3-甲基丁烷-1,2,3-三醇和至少一些MBO衍生的有机硫酸盐是由这些环氧化物的反应形成的。通常，由MBO衍生的环氧化物生产的特定MBO衍生的有机硫酸盐和硝酸盐及其各自的水解稳定性与异戊二烯衍生的环氧化物相似。亲核反应被观察到具有很强的区域特异性，并且发现第三级加成产物在大气相关的时间尺度上水解。

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