Relaxation dynamics of NH stretching vibrations of 2-aminopyridine and its dimer in a supersonic beam
Proceedings of the National Academy of Sciences of the United States of America 105 巻 35 号
12690-12695 頁
2008 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
Relaxation dynamics of NH stretching vibrations of 2-aminopyridine and its dimer in a supersonic beam
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| 作成者 |
Yamada Yuji
Mikami Naohiko
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| 収録物名 |
Proceedings of the National Academy of Sciences of the United States of America
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| 巻 | 105 |
| 号 | 35 |
| 開始ページ | 12690 |
| 終了ページ | 12695 |
| 抄録 |
Picosecond time-resolved IR-UV pump-probe spectroscopy has been carried out in order to elucidate vibrational energy relaxation (VER) of the NH stretching vibrations of 2-aminopyridine monomer (2AP) and dimer ((2AP)2) in supersonic beams. In bare 2AP, intramolecular vibrational energy redistribution (IVR) of the NH vibrations is described by the two bath mode model, where the initial vibrational energy flows to the doorway states rapidly (6.5 ps) and then dissipates into the dense bath states with a time constant of ~20 ps. No clear difference was observed in the IVR lifetime between the symmetric and asymmetric NH2 stretch modes. In (2AP)2, IVR and vibrational predissociation (VP) were involved in VER. It was found that the rate constants of both IVR and VP of the hydrogen-bonded NH stretching vibration are larger than those of the free NH.
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| NDC分類 |
化学 [ 430 ]
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| 言語 |
英語
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| 資源タイプ | 学術雑誌論文 |
| 出版者 |
National Academy of Sciences
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| 発行日 | 2008 |
| 権利情報 |
Copyright (c) 2008 by The National Academy of Sciences of the USA
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| 出版タイプ | Author’s Original（十分な品質であるとして、著者から正式な査読に提出される版） |
| アクセス権 | オープンアクセス |
| 収録物識別子 |
[ISSN] 0027-8424
[DOI] 10.1073/pnas.0800354105
[NCID] AA10808769
[DOI] http://dx.doi.org/10.1073/pnas.0800354105
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