Irradiation of water ice by C(+) ions in the cosmic environment.
Irradiation of water ice by C(+) ions in the cosmic environment.
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宇宙环境中 C( ) 离子对水冰的照射。
DOI:
10.1021/jp502738x
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
McBride EJ
中科院分区:
文献类型:
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作者:
McBride EJ
We present a first-principles MD (FPMD) study of the interaction of low-energy, positively charged carbon (C+) projectiles with amorphous solid water clusters at 30 K. Reactions involving the carbon ion at an initial energy of 11 and 1.7 eV with a 30-molecule cluster have been investigated. Simulations indicate that the neutral isoformyl radical, COH•, and carbon monoxide, CO, are the dominant products of these reactions. All of these reactions are accompanied by the transfer of a proton from the reacting water molecule to the ice, where it forms a hydronium ion. We find that COH•is formed either via a direct, “knock-out”, mechanism following the impact of the C+projectile upon a water molecule or by creation of a COH2+intermediate. The direct mechanism is more prominent at higher energies. CO is generally produced following the dissociation of COH•. More frequent production of the formyl radical, HCO•, is observed here than in gas-phase calculations. A less commonly occurring product is the dihydroxymethyl, CH(OH)2•, radical. Although a minor result, its existence gives an indication of the increasing chemical complexity that is possible in such heterogeneous environments.
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DOI:
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发表时间:
2008
期刊:
影响因子:
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作者:
Oscar Martinez, Jr.;Nicholas B. Betts;Stephanie M. Villano;Nicole Eyet;T. Snow;V. Bierbaum
通讯作者:
V. Bierbaum
DOI:
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发表时间:
1985
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影响因子:
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作者:
D. Sonnenfroh;R. Curtis;J. M. Farrar
通讯作者:
J. M. Farrar
DOI:
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发表时间:
2009
期刊:
影响因子:
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作者:
A. Maergoiz;E. E. Nikitin;J. Troe
通讯作者:
J. Troe
DOI:
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发表时间:
1983
期刊:
影响因子:
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作者:
E. Herbst;N. Adams;David Smith
通讯作者:
David Smith
DOI:
10.1002/cphc.200500555
发表时间:
2006-04
期刊:
Chemphyschem : a European journal of chemical physics and physical chemistry
影响因子:
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作者:
Peter R. Schreiner;H. Reisenauer
通讯作者:
Peter R. Schreiner;H. Reisenauer