2004 Fiscal Year Final Research Report Summary
Development of direct ab-initio dynamics method and its application to reaction design
| Project/Area Number |
15550001
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical chemistry
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| Research Institution | Hokkaido University |
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Principal Investigator |
TACHIKAWA Hiroto Hokkaido Univ., Grad.School of Eng., Inst., 大学院・工学研究科, 助手 (10207045)
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| Project Period (FY) |
2003 – 2004
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| Keywords | Ab-initio MD / Direct ab-initio dynamics / Cluster chemistry / Reaction dynamics / Diffusion dynamics / Ionization dynamics / Electron capture / 溶媒効果 |
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| Research Abstract |
Direct ab-initio dynamics method to treat reaction dynamics has been developed and applied to several chemical reactions and diffusion dynamics of ion and atoms on graphite surfaces. In this new method, all degrees of freedom of reaction system are precisely included during the reaction. As a model case, the ionization dynamics of water clusters have been investigated by means of direct ab-initio dynamics method. It was found that a proton of the ionized water molecule is rapidly transferred to the neighboring water molecule within 200 fs after the ionization. Electron capture of water clusters was also studied by the trajectory calculations. The excess electron was trapped firstly in the surface state of water cluster, and then the water molecules oriented gradually toward the excess electron. The 1s-2p transition of electron was blue-shifted as a function of salvation time.
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