电子辐照H₂¹⁸O/O₂冰混合物中过氧化氢（HOOH）、氢三氧化物（HOOO）和二氢三氧化物（HOOOH）同位素异构体形成的机理研究。

Mechanistical studies on the formation of isotopomers of hydrogen peroxide (HOOH), hydrotrioxy (HOOO), and dihydrogentrioxide (HOOOH) in electron-irradiated H(2)(18)O/O(2) ice mixtures.

作者信息

Zheng Weijun, Jewitt David, Kaiser Ralf I

机构信息

Institute for Astronomy, University of Hawaii at Manoa, Honolulu, HI 96822, USA.

出版信息

Phys Chem Chem Phys. 2007 May 28;9(20):2556-63. doi: 10.1039/b700814g. Epub 2007 Mar 13.

DOI:10.1039/b700814g

PMID:17508088

Abstract

In order to investigate the chemical reactions inside water-oxygen ice mixtures in extreme environments, and to confirm the proposed reaction mechanisms in pure water ice, we conducted a detailed infrared spectroscopy and mass spectrometry study on the electron irradiation of H(2)(18)O/O(2) ice mixtures. The formation of molecular hydrogen, isotopically substituted oxygen molecules (18)O(18)O and (16)O(18)O, ozone ((16)O(16)O(16)O, (16)O(16)O(18)O, and (16)O(18)O(16)O), hydrogen peroxide (H(18)O(18)OH, H(16)O(16)OH and H(16)O(18)OH), hydrotrioxy (HOOO), and dihydrogentrioxide (HOOOH) were detected. Kinetic models and reaction mechanisms are proposed to form these molecules in water and oxygen-rich solar system ices.

摘要

为了研究极端环境下水 - 氧冰混合物内部的化学反应，并证实纯水冰中提出的反应机制，我们对H₂¹⁸O/O₂冰混合物的电子辐照进行了详细的红外光谱和质谱研究。检测到了分子氢、同位素取代的氧分子¹⁸O¹⁸O和¹⁶O¹⁸O、臭氧（¹⁶O¹⁶O¹⁶O、¹⁶O¹⁶O¹⁸O和¹⁶O¹⁸O¹⁶O）、过氧化氢（H¹⁸O¹⁸OH、H¹⁶O¹⁶OH和H¹⁶O¹⁸OH）、氢三氧基（HOOO）和二氢三氧化物（HOOOH）的形成。提出了动力学模型和反应机制来解释在富含水和氧气的太阳系冰中形成这些分子的过程。