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Student Number 962203030
Author Shi-Xing Yang(楊士興)
Author's Email Address No Public.
Statistics This thesis had been viewed 666 times. Download 11 times.
Department Chemistry
Year 2008
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title Multiphoton photodissociation mechanisms of dibromochloromethane at near ultraviolet wavelengths.
Date of Defense 2009-06-25
Page Count 86
Keyword
  • dibromochloromethane
  • Multiphoton photodissociation mechanisms
  • Abstract The photolysis at near ultraviolet wavelengths of halomethanes such as dibromochloromethane (CHBr2Cl) is an importance source of bromine atoms that contributes to the stratospheric ozone depletion, but the multiphoton photodissociation mechanisms of CHBr2Cl still remain unclear. Previous study at 266 nm has some results that are inconsistent with the mechanism model for other bromomethanes (CHBr3 and CHBrCl2). In this thesis, we investigated the multiphoton photolysis of CHBr2Cl at 266 nm as well as at other wavelengths (280 nm, 285 nm, 289 nm, and 355 nm). Nascent emission spectra and laser-induced dispersed fluorescence spectra of products or reaction intermediates in these photolysis reactions of CHBr2Cl in a slow flow cell were successfully recorded. Several electronically excited species including CH (A2Δ, B2Σ–, and C2Σ+), C2 (d3Πg), and excited state atomic Br were observed in the nascent emission spectra, while CHCl was successfully found using the laser-induced dispersed fluorescence spectroscopy. More experiments including the concentration dependence and the power dependence were also conducted and these results clarified the multiphoton photolysis mechanism of CHBr2Cl at near ultraviolet wavelengths.
    Table of Content 摘要 (中文) Ⅰ
    摘要 (英文) Ⅱ
    謝誌 Ⅲ
    目錄 Ⅳ
    表目錄 Ⅵ
    圖目錄 Ⅶ
    第一章 導論
    1-1 研究方向與動機 1
    1-2 溴仿、一溴二氯甲烷、二溴一氯甲烷之相關研究 2
    1-3 研究目標 8
    第二章 實驗
    2-1 光譜技術的簡介 9
    2-2 流動式樣品槽之實驗裝置 11
    2-3 光解雷射 12
    2-4 增強式電荷偶合裝置偵測器 13
    2-5 光解後之放光收集 16
    2-6 利用染料雷射激發物種之螢光分光光譜 19
    2-6-1 改變樣品槽壓力觀測訊號強弱的關係 19
    2-6-2 不同功率之雷射光源對訊號放光強度的關係 20
    2-6-3 在不同壓力下改變石榴石雷射與染料雷射兩 20
       者的相對延遲時間隊物種訊號放光強度的關係
    第三章 光解CHBr2Cl之放射光譜與機構探討
    3-1 流動式樣品槽內光解二溴一氯甲烷之放射光譜22
    3-1-1如何產生激發態溴原子 25
    3-2 266 nm 光解二溴一氯甲烷之中間產物其螢光分光光譜 27
    3-2-1 CHCl 物種的螢光分光光譜 28
    3-2-2 CHBr 物種的螢光分光光譜 31
    3-3 266 nm 光解 CHBrCl 的光解機制 33
    3-4 近紫外光 (266 nm、280 nm、285 nm、289 nm)
    波長光解CHBr2Cl 之放射光譜探討 35
    第四章結論 40
    參考文獻43
    Reference 1. M. J. Molina and F. S. Rowland, Nature (London) 249, 810
    (1974).
    2. L. A. Barrie, J. W. Bottenheim, R. C. Schnell, P. J. Crutzen, and R. A. Rasmussen, Nature 334, 138 (1988).
    3. A. Saiz-Lopez, A. S. Mahajan, R. A. Salmon, S. J. B. Bauguitte, A. E. Jones, H. K. Roscoe and J. M. C. Plane, Science 317, 348 (2007)
    4. R. M. Moore, M. Webb, R. Tokarczyk, and R. Weaver,J.Geophys.Res. 101, 20899 (1996).
    5. D. A. Lichtin, M. R. Berman, and M. C. Lin, Chem. Phys .Lett.108, 18 (1984).
    6. B.-C. Chang and T. J. Sears, J. Chem. Phys. 105, 2135 (1996).
    7. J. Lindner, K. Ermisch, and R. Wilhelm, Chem. Phys. 238, 329 (1998).
    8. W. S. McGivern, O. Sorkhabi, A. G. Suits, A. Derecskei-Kovacs, and S. W. North, J. Phys. Chem. A 104, 10085 (2000).
    9. W.-L. Liu and B.-C. Chang, J. Chin. Chem. Soc. 48, 613 (2001).
    10. B. J. Petro, E. D. Tweeten, and R. W. Quandt, J. Phys. Chem. A 108, 384 (2004).
    11. H.-Y. Huang, W.-T. Chuang, R. C. Sharma, C.-Y. Hsu, K.-C. Lin,and C.-H. Hu, J. Chem. Phys. 121, 5253 (2004).
    12. V. Chikan, F. Fournier, S. R. Leone, and B. Nizamov, J. Phys.Chem. A 110, 2850 (2006).
    13. T. Ibuki, A. Hiraya, and K. Shobatake, J. Chem. Phys. 96, 8793 (1992).
    14. 戴建弘,國立中央大學化學系碩士論文 (2008)。
    15. M. Bilde, T. J. Wallington, C. Ferronato, J. J. Orlando, G. S.Tyndall, E. Estupinan, and S.Haberkorn, J. Phys. Chem. A 102, 1976 (1998).
    16. F. Taketani, K. Takahashi, and Y. Matsumi, J. Phys. Chem. A 109, 2855 (2005).
    17. P.-Y. Wei, Y.-P. Chang, Y.-S. Lee, W.-B. Lee, K.-C. Lin, K. T. Chen, and A. H. H. Chang, J. Chem. Phys. 126, 34311 (2007).
    18. 詹宗翰,國立中央大學化學系碩士論文 (2007)。
    19. Princeton Instruments website,
    http://www.piacton.com/products/imcam/pimax/default.aspx.
    20. G. Herzberg, Molecular Spectra and Molecular Structure Vol.Ⅰ. Spectra of Diatiomic Molecules, 2nd ed. (Krieger, Malabar, Florida, 1989).
    21. W. Ubachs, G. Meyer, J. J. ter Meulen, and A. Dymanus, J. Chem. Phys. 84, 3032 (1986).
    22. Z. Bembenek, R. Kepa, A. Para, M. Rytel, M. Zachwieja, J. D.Janjic and E. Marx, J. Mol. Spectrosc. 139, 1 (1990).
    23. P. F. Bernath, C. R. Brazier, T. Olsen, R. Hailey, W. T. M. L. Fernando, Ch. Woods ,and J. L. Hardwick, J. Mol. Spectrosc. 147, 16 (1991).
    24. R. Kepa, A. Para, M. Rytel, and M. Zachwieja, J. Mol. Spectrosc. 178, 189 (1996).  
    25. C. E. Moore, Atomic Energy Levels (Nat. Bur. Stand., U. S.GPO, Washington, DC, 1971), Vol. 2.
    26. D. R. Lide, Editor, CRC Handbook of Chemistry and Physics, 76th ed. (CRC Press, New York, 1995).
    27. C.-W. Chen, T.-C. Tsai, and B.-C. Chang, Chem. Phys. Lett. 347, 73 (2001).
    28. C.-S. Lin, Y.-E. Chen, and B.-C. Chang, J. Chem. Phys. 121, 4164 (2004).
    29. T.-C. Tsai, C.-W. Chen, and B.-C. Chang, J. Chem. Phys. 115,766 (2001).
    30. G. Herzberg, Molecular Spectra and Molecular Structure Vol .III, Electronic Spectra and Electronic Structure of Polyatomic Molecules, 2nd ed. (Krieger, Malabar, Florida, 1989).
    31. N. S. Shuman, L. Y. Zhao, M. Boles, and T. Baer, J. Phys. Chem. A 112, 10533 (2008).
    32. F. Taketani, K. Takahashi, and Y. Matsumi, J. Phys. Chem. A 109, 2855 (2005).
    33. NIST Chemistry Webbook, http://webbook.nist.gov/chemistry/.
    Advisor
  • Bor-Chen Chang(張伯琛)
  • Files
  • 962203030.pdf
  • disapprove authorization
    Date of Submission 2009-07-21

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