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利用傅里叶变换红外光谱测量甲苯光氧化产物
投稿时间:2017-09-14  修订日期:2017-10-08  点此下载全文
引用本文:徐俊,黄明强,蔡顺有,赵卫雄,胡长进,张为俊.利用傅里叶变换红外光谱测量甲苯光氧化产物[J].红外,2017,38(12):32~37
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作者单位E-mail
徐俊 闽南师范大学化学与环境学院 fjxujun@gmail.com 
黄明强 闽南师范大学化学与环境学院 huangmingqiang@gmail.com 
蔡顺有 闽南师范大学化学与环境学院  
赵卫雄 中国科学院安徽光学精密机械研究所大气物理化学实验室  
胡长进 中国科学院安徽光学精密机械研究所大气物理化学实验室  
张为俊 中国科学院安徽光学精密机械研究所大气物理化学实验室  
基金项目:国家自然科学基金项目(41575118;41305109);福建省自然科学基金杰青项目(2015J06009)
中文摘要:甲苯是大气中主要的挥发性有机污染物 和二次有机气溶胶的前体物。采用自制的烟雾腔模拟装置 研究了无氨和有氨时由羟基启动的甲苯光氧化过程,利用傅里 叶变换衰减全反射红外光谱测量了甲苯光氧化产物的分子官能 团,并对其化学组分进行了定性分析。实验结果表明,两种情况下 的甲苯光氧化产物中都含有苯 环、O-H、C=O和C-O等官能团,并 含有较高浓度的甲基酚、醛、酮和羧酸等有机物。而有氨 时的甲苯光氧化产物中还含有C=N、C-N和N-H等官能团,它们 对应于咪唑类含氮有机物的化学键特性。该结果为研究甲苯光氧化 反应机理提供了新的实验依据。
中文关键词:傅里叶变换衰减全反射红外光谱  羟基    甲苯光氧化产物  二次有机气溶胶
 
Measurement of Photooxidation Products of Toluene by Fourier Transform Infrared Spectroscopy
Abstract:Toluene is the major volatile contaminant and secondary organic aerosol precursor in atmosphere. A home-made smog chamber is used to study the OH-initiated photooxidation process of toluene in the absence and presence of ammonia. The molecular functional groups of the photooxidation products of toluene are measured by a Fourier transform attenuated total reflection infrared spectrometer. The chemical components of the products are analyzed qualitatively. The experimental results show that there are functional groups such as benzene ring, O-H, C=O and C-O in the photooxidation products of toluene both with and without ammonia and high concentration organic compounds such as cresol, aldehydes and carboxylic acids are contained in the groups. However, in the presence of ammonia, C=N, C-N, N-H and other functional groups corresponding to the imidazole nitrogen-contained organic compounds are also contained in the photooxidation products of toluene. These results provide new experimental basis for the study of the photooxidation mechanism of toluene.
keywords:Fourier transform attenuated total reflection infrared spectroscopy  hydroxyl  ammonia  toluene photo-oxidation product  secondary organic aerosol
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