Experimental and Theoretical Study on the Ethane and Acetylene Formation from Electron Irradiation of Methane Ices

• 作者: Fang Xu Giulio Manicò Marianna Barberio Pasquale Barone Roberta Vasta
• 来源期刊: 凝固态物理国际期刊(英文)
• 学科: 化学
• 关键词: Solid ICES ETHANE FORMATION ACETYLENE FORMATION Electron IRRADIATION
• 年，卷（期）: 2013,（1）
• 页码范围: 14-20
• 页数: 7页
• 分类号: O6

摘要

In this work we present an experimental and theoretical study on the formation of ethane and acetylene from solid methane condensed at 20 K and irradiated with a 500 - 3000 eV electron beam. The experiments were monitored with Thermal Desorption Spectroscopy. We observe that the electron irradiation induced a dehydrogenation of methane and a consequent formation of CHx (x = 1, 2, 3) fragments. Furthermore, in the solid during irradiation, a simple recombinetion reaction in the solid between two adjacent CHx molecules may form HC≡CH, H2C=CH2, and H3C-CH3 with a triple, double, and single carbon-carbon bond, respectively. The formed amount of ethane and acetylene increases with irradiation time and reaches a saturation value.