UV-induced protonation of molecules adsorbed on ice surfaces at low temperature.
UV-induced protonation of molecules adsorbed on ice surfaces at low temperature.
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低温下吸附在冰表面的分子的紫外线诱导质子化。
DOI：
10.1063/1.2925209
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Heon Kang
中科院分区：
文献类型：
--
作者：
Eui;Chang;Joon;S. Park;Heon Kang
低温（50-130 K）下，紫外光照射吸附甲胺分子的冰膜，引起吸附物分子质子化。结果表明，紫外光照射在冰膜上产生了长寿命的质子缺陷，低温下这些质子缺陷通过隧道效应将质子传递给吸附物分子。质子转移形成的甲基铵离子在冰面上保持稳定。有人建议，这种固相质子化可能发挥重要作用，在星际云的分子离子的生产。
UV irradiation of ice films adsorbed with methylamine molecules induces protonation of the adsorbate molecules at low temperature (50-130 K). The observation indicates that long-lived protonic defects are created in the ice film by UV light, and they transfer protons to the adsorbate molecules via tunneling mechanism at low temperature. The methylammonium ion formed by proton transfer remains to be stable at the ice surface. It is suggested that this solid-phase protonation might play a significant role in the production of molecular ions in interstellar clouds.