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Synthesis of Polycyclic Aromatic Hydrocarbons from Benzene by Impact Shock: Its Reaction Mechanism and Cosmochemical Significance
http://hdl.handle.net/2237/15855
http://hdl.handle.net/2237/158555cfb57ed-5cf0-4979-97a3-fc8d045e292e
| Item type | 学位論文 / Thesis or Dissertation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2012-01-04 | |||||
| タイトル | ||||||
| タイトル | Synthesis of Polycyclic Aromatic Hydrocarbons from Benzene by Impact Shock: Its Reaction Mechanism and Cosmochemical Significance | |||||
| 言語 | en | |||||
| 著者 |
Mimura, Koichi
× Mimura, Koichi |
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| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 権利 | ||||||
| 言語 | en | |||||
| 権利情報 | This is the author's version of a work that was accepted for publication in Geochimica et Cosmochimica Acta. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms, may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Geochimica et Cosmochimica Acta. v.59, n.3, 1995, DOI:10.1016/0016-7037(95)00326-U. | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The synthesis of polycyclic aromatic hydrocarbons (PAHs) from benzene by shock waves was studied, in order to search for a novel possibility of PAH formation under cosmochemical conditions. Shock waves generated by projectile impacts were transmitted into pure benzene, and then the shocked samples were analyzed by FID gas chromatography and gas chromatography - mass spectrometry. The projectile velocity ranged from 100 to 1200 m/s. The physical conditions of shocked benzene in liquid form were estimated by the Hugoniot data. The shock waves caused reactions between benzene molecules to produce PAHs with high-molecular weight ranging from 128 (naphthalene) to 306 (quaterphenyl). Major products were naphthalene, biphenyl, fluorene, trans-stilbene, phenanthrene and chrysene. Striking aspects emerge from the experiments; (1) the molar yields of products were enhanced exponentially with increasing projectile velocity, (2) the composition of products remained constant independent of the projectile velocity, (3) the mutual ratios between structural isomers and the ratios of various products to chrysene showed definite values independent of the projectile velocity. These results were identical for experiments at two different temperatures, 77K (benzene in solid form) and 290K (benzene in liquid form). I propose in this study that thermochemical reactions of ground states play a major role in the shock synthesis, although reactions of excited states can not be ruled out Examination of the yield relationships among structural isomers in products suggests that concerted cycloaddition reactions controlled by Woodward-Hoffmann rules explain the formation of some products better than do radical addition reactions. Most species of PAHs reported to be present in carbonaceous chondrites and interplanetary dust particles were synthesized during the present experiment. Furthermore, abundance ratios between some structural isomers in shock-induced PAHs are approximately the same as those in carbonaceous chondrites such as the Murchison meteorite. Shock synthesis must have operated during shock events in cosmochemical environments, and the shock-induced PAHs may be present in the interstellar medium, in atmospheres of Jovian planets and in carbonaceous chondrites. | |||||
| 言語 | en | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 名古屋大学博士学位論文 学位の種類 : 博士(理学)(論文) 学位授与年月日:平成7年3月1日 三村耕一氏の博士論文として提出された | |||||
| 言語 | ja | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 図表の一部は掲載していません | |||||
| 言語 | ja | |||||
| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||
| 資源タイプ | doctoral thesis | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1016/0016-7037(95)00326-U | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0016-7037 | |||||
| 書誌情報 |
en : Geochimica et Cosmochimica Acta 巻 59, 号 3, p. 579-591, 発行日 1995-02 |
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| 学位名 | ||||||
| 言語 | ja | |||||
| 学位名 | 博士(理学) | |||||
| 学位授与機関 | ||||||
| 学位授与機関識別子Scheme | kakenhi | |||||
| 学位授与機関識別子 | 13901 | |||||
| 言語 | ja | |||||
| 学位授与機関名 | 名古屋大学 | |||||
| 言語 | en | |||||
| 学位授与機関名 | Nagoya University | |||||
| 学位授与年度 | ||||||
| 値 | 1994 | |||||
| 学位授与年月日 | ||||||
| 学位授与年月日 | 1995-02-01 | |||||
| 学位授与番号 | ||||||
| 学位授与番号 | 乙第4742号 | |||||
| 著者版フラグ | ||||||
| 値 | publisher | |||||
| URI | ||||||
| 識別子 | http://dx.doi.org/10.1016/0016-7037(95)00326-U | |||||
| 識別子タイプ | DOI | |||||
| URI | ||||||
| 識別子 | http://hdl.handle.net/2237/15855 | |||||
| 識別子タイプ | HDL | |||||
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