Accessing the Nitromethane (CH<sub>3</sub>NO<sub>2</sub>) Potential Energy Surface in Methanol (CH<sub>3</sub>OH)–Nitrogen Monoxide (NO) Ices Exposed to Ionizing Radiation: An FTIR and PI-ReTOF-MS Investigation
作者:Sándor Góbi、Parker B. Crandall、Pavlo Maksyutenko、Marko Förstel、Ralf I. Kaiser
DOI:10.1021/acs.jpca.7b12235
日期:2018.3.8
radiation to facilitate the eventual determination of the CH3NO2 potential energy surface (PES) in the condensed phase. Reaction intermediates and products were monitored via infrared spectroscopy (FTIR) and photoionization reflectron time-of-flight mass spectrometry (PI-ReTOF-MS) during the irradiation and temperature controlled desorption (TPD) phase, respectively. Distinct photoionization energies
将(D 3-)甲醇-一氧化氮(CH 3 OH / CD 3 OH-NO)冰暴露于电离辐射下,以便最终确定冷凝相中CH 3 NO 2的势能面(PES)。在辐射和温度控制脱附(TPD)阶段分别通过红外光谱(FTIR)和光电离反射电子飞行时间质谱(PI-ReTOF-MS)监控反应中间体和产物。利用不同的光电离能来区分在这些过程中形成的异构体。甲醇的主要裂解产物为甲氧基(CH 3 O)和羟甲基(CH 2OH)自由基以及氢原子。发现前者可与一氧化氮无障碍反应,导致形成顺式和反式亚硝酸甲酯(CH 3 ONO),这是在辐照样品中可以观察到的最丰富的产物。另一方面,相比于一氧化氮与亚硝基甲醇(HOCH)的重组,优选产生乙二醇(HO(CH 2)2 OH)和甘油(HOCH 2 CH 2(OH)CH 2 OH)的羟甲基自由基的自重组。2 NO)。