Fragmentation of adenine under energy control
文献类型：期刊论文
| 作者 | Bredy, Richard1,3; Li, Bin1,2,3 ; Chen, Li1,3; Montagne, Guillaume1,3; Martin, Serge1,3; Bernard, Jerome1,3
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| 刊名 | JOURNAL OF CHEMICAL PHYSICS
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| 出版日期 | 2009-03-21 |
| 卷号 | 130页码:11 |
| 关键词 | biochemistry chlorine dissociation electron capture energy loss of particles ion-molecule collisions molecular biophysics organic compounds positive ions |
| ISSN号 | 0021-9606 |
| DOI | 10.1063/1.3080162 |
| 英文摘要 | We present results on the fragmentation of adenine dication as a function of the excitation energy. The adenine molecule is charged and excited in a single collision with Cl+ ion at 3 keV and the excitation energy distribution is obtained for each fragmentation channel by measuring the kinetic energy loss of the projectile. This method named collision induced dissociation under energy control is based on the formation of a negative scattered projectile as a result of double electron capture from the target molecule. Comparison between the main dissociation channels of singly and doubly charged adenine shows that fragmentation patterns are very similar consisting mainly of the successive emission of neutral HCN or H2CN+. The energy distributions of the parent adenine dication and the kinetic energy release of the fragments measured for the most abundant fragmentation channels confirms the assumption of successive emission dynamics. A specific fragmentation pathway of the adenine requiring less energy than the usual successive emission of neutral HCN could be identified. It consists of the emission of a charged H2CN+ following on by the emission of a dimer of HCN (precisely HC2N2). This new channel, measured for a mean excitation energy of 8.4 eV for the adenine dication is very closed to the emission of HCN monomer measured at 7.9 eV. The implications of these results concern the formation of adenine in the sealed-tube reaction of HCN with liquid ammonia as well as the possible formation of the adenine molecule in the interstellar medium. This last point is briefly discussed in relation to astrobiology and exobiology interests. |
| WOS关键词 | ELECTRONS ; DISSOCIATION |
| 资助项目 | European Project ITS LEIF[RII3/026015] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000264380400015 |
| 出版者 | AMER INST PHYSICS |
| 资助机构 | European Project ITS LEIF |
| 源URL | [http://119.78.100.186/handle/113462/31298]  |
| 专题 | 近代物理研究所_实验物理中心 |
| 通讯作者 | Bredy, Richard |
| 作者单位 | 1.Univ Lyon 1, CNRS, UMR 5579, LASIM, Villeurbanne, France 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 3.Univ Lyon, F-69622 Lyon, France |
| 推荐引用方式 GB/T 7714 | Bredy, Richard,Li, Bin,Chen, Li,et al. Fragmentation of adenine under energy control[J]. JOURNAL OF CHEMICAL PHYSICS,2009,130:11. |
| APA | Bredy, Richard,Li, Bin,Chen, Li,Montagne, Guillaume,Martin, Serge,&Bernard, Jerome.(2009).Fragmentation of adenine under energy control.JOURNAL OF CHEMICAL PHYSICS,130,11. |
| MLA | Bredy, Richard,et al."Fragmentation of adenine under energy control".JOURNAL OF CHEMICAL PHYSICS 130(2009):11. |
入库方式： OAI收割
来源：近代物理研究所
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