Reorientation effect in chemical reaction and orientation dependence for branching ratio of reaction products

• Project/Area Number: 21550013
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Physical chemistry
• Research Institution: Osaka University
• Principal Investigator: CHE Dock-chil 大阪大学, 大学院・理学研究科, 助教 (20273732)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2009: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: 化学反応 / 立体ダイナミクス / 反応分岐 / 配向分子線 / OHラジカル / 反応機構の解明 / 再配向 / アライメント状態選別 / 偏光レーザー / 準安定CO分子 / 偏向レーザー / 準安定CO(a) / 分子の最配向 / 分子の電子密度 / 分子のアライメント状態選別 / 反応制御 / 立体効果の直接観測 / 反応遷移状態

Research Abstract

Direct observation of the steric effect in the OH+ HBr chemical reaction was made by controlling the OH radical orientation in order to clarify mechanisms for stereo-anisotropy. We find that the HBr collision at the O-end of OH radical is more favorable than that at the H-end. The theoretical analysis suggested that there are at least two mechanisms play roles to give the observed steric effect. One is the H atom abstraction at the O-end of OH and another is the H atom migration at the H-end of OH. Alignment of CO(a) was performed using a linearly polarized laser at 206 nm. This success will allow us to control molecular orientation at transition state in a novel way.

Research Products

• [Journal Article] Electrostatic hexapole state-selection of the asymmetric-top molecule propylene oxide : Rotational and orientational distributions (2012)
  • Author(s): D.-C. Che, K. Kanda, F. Palazzetti, V. Aquilanti, T. Kasai
  • Journal Title: Chem. Phys. Volume: vol.399 Pages: 180-192
  • Peer Reviewed
• [Journal Article] Electrostatic hexapole state-selection of the asymmetric-top molecule propylene Oxide : Rotational and orientation distributions (2012)
  • Author(s): D.-C.Che, 他4名
  • Journal Title: Chem.Phys. Volume: (印刷中)(未定)
  • Peer Reviewed
• [Journal Article] Reaction dynamics with molecular beams and oriented molecular beams : A tool for looking closer to chemical reactions and photodissociations (2012)
  • Author(s): T.Kasai, D.-C. Che, 他2名
  • Journal Title: Journal of the Chinese Chemical Society Volume: (印刷中)(未定)
  • Peer Reviewed
• [Journal Article] Orientation dependence for Br formation in the reaction of oriented OHradical with HBr molecule (2011)
  • Author(s): P.-Y. Tsai, D.-C. Che, M. Nakamura, K.-C. Lin, T. Kasai
  • Journal Title: Phys. Chem. Chem. Phys. Volume: vol.13 Pages: 1419-1423
  • Peer Reviewed
• [Journal Article] Orientation dependence for Br formation in the reaction of oriented OH radical with HBr molecule (2011)
  • Author(s): P.-Y.Tsai、D.-C.Che, 他3名
  • Journal Title: Phys.Chem.Chem.Phys. Volume: 13 Issue: 4 Pages: 1419-1423
  • DOI: 10.1039/c0cp01089h
  • Peer Reviewed
• [Journal Article] Electrostatic Hexapole State-Selection of the Asymmetric-Top Molecule Propylene Oxide (2011)
  • Author(s): D.-C.Che, 他4名
  • Journal Title: Chem.Phys. Volume: (印刷中)(未定)
  • Peer Reviewed
• [Journal Article] Orientation dependence in the four-atom reaction of OH+ HBr using the single-state oriented OH radical beam (2010)
  • Author(s): P.-Y. Tsai, D.-C. Che, M. Nakamura, K.-C. Lin, T. Kasai
  • Journal Title: Phys. Chem. Chem. Phys.,(Communications) Volume: vol.12 Pages: 2532-2534
  • Peer Reviewed
• [Journal Article] Electrostatic Hexapole State-Selection of the Asymmetric-Top Molecule Propylene Oxide (2010)
  • Author(s): D.-C. Che, F. Palazzetti, Y. Okuno, V. Aquilanti, T. Kasai
  • Journal Title: J. Phys. Chem. A. Volume: vol.114 Pages: 3280-3286
  • Peer Reviewed
• [Journal Article] Orientation dependence in the four-atom reaction of OH+HBr using the single-state oriented OH radical beam (2010)
  • Author(s): P, -Y.Tsai, et. al.
  • Journal Title: Phys.Chem.Chem.Phys.(communications) 12 Pages: 2532-2534
  • Peer Reviewed
• [Journal Article] Electrostatic Hexapole State-Selection of the Asymmetric-Top Molecule Propylene Oxide (2010)
  • Author(s): D.-C.CHE, et al.
  • Journal Title: J.Phys.Chem.A. 114 Pages: 3280-3286
  • Peer Reviewed
• [Journal Article] Collision energy dependence for the Br formation in the reaction of OD+ HBr (2009)
  • Author(s): D.-C. Che, A. Doi, Y. Yamamoto, Y. Okuno, T. Kasai
  • Journal Title: Phys. Scr. Volume: vol.80 Pages: 48110-48114
  • Peer Reviewed
• [Journal Article] Collision energy dependence for the Br formation in the reaction of OD+HBr (2009)
  • Author(s): D.-C.CHE, et al.
  • Journal Title: Physica Scripta 80
  • Peer Reviewed
• [Journal Article] Reaction dynamics by beams and oriented molecular beams : Tools for looking closer to chemical and photodissociation reactions
  • Author(s): T. Kasai, D.-C. Che, P.-Y. Tsai, K.-C. Lin
  • Journal Title: J. Chinese. Chem. Soc. Volume: (印刷中)
  • Peer Reviewed
• [Presentation] Generation for aligned molecular beam of metastable CO(a) and stereodynamics in the reaction of CO(a)+OH (2011)
  • Author(s): M.Nakamura, D.-C.Che, 他2名
  • Organizer: 第27回化学反応討論会
  • Place of Presentation: 東京工業大学(東京都)
  • Year and Date: 2011-06-09
• [Presentation] Generation for aligned molecular beam of metastable CO(a) and stereodynamics in the reaction of CO(a)+ OH reaction (2011)
  • Author(s): M. Nakamura, D.-C. Che, P.-Y. Tsai, K.-C. Lin T. Kasai
  • Organizer: 第5回化学反応討論会
  • Place of Presentation: 東京工業大学
  • Year and Date: 2011-06-08
• [Presentation] Oriented Molecular Beams and Chemical Reactions (2011)
  • Author(s): T. Kasai and D.-C. Che, K.-C. Lin,
  • Organizer: XXIVth International Symposium on Molecular Beams(国際学会・招待講演)
  • Place of Presentation: Bordeaux France
  • Year and Date: 2011-05-18
• [Presentation] Embedded Sign of Stereodynamics in Overall Chemical Reaction (2010)
  • Author(s): D.-C. Che and T. Kasai
  • Organizer: Stereodynamics(国際学会・招待講演)
  • Place of Presentation: Santa Cruz(米国)
  • Year and Date: 2010-11-28
• [Presentation] Embedded Sign of Stereodynamics in Overall Chemical Reaction (2010)
  • Author(s): T, Kasai, D.-C.Che
  • Organizer: Stereodynamics
  • Place of Presentation: Santa Cruz,米国(招待講演)
  • Year and Date: 2010-11-05
• [Presentation] Stereodynamics : Generic Meaning in Chemical Reactions (2010)
  • Author(s): T, Kasai, D.-C.Che
  • Organizer: III SEEDMOL
  • Place of Presentation: Brasilia-DF, Brasil(招待講演)
  • Year and Date: 2010-10-25
• [Presentation] Stereodynamics : Generic Meaning in Chemical Reactions (2010)
  • Author(s): D.-C. Che and T. Kasai
  • Organizer: III SEEDMOL(国際学会・招待講演)
  • Place of Presentation: Brasilia-DF, Brasil
  • Year and Date: 2010-10-09
• [Presentation] OHの配向制御によるOH+ HBrの反応機構の解明 (2010)
  • Author(s): 中村雅明、蔡徳七、P.-Y. Tsai, K.-C. Lin, 笠井俊夫
  • Organizer: 分子科学討論会2010
  • Place of Presentation: 大阪大学
  • Year and Date: 2010-09-17
• [Presentation] OHの配向制御によるOH+HBrの反応機構の解明 (2010)
  • Author(s): 中村雅明, 蔡徳七, 他3名
  • Organizer: 分子科学討論会2010
  • Place of Presentation: 大阪大学(大阪府)
  • Year and Date: 2010-09-17
• [Presentation] OH orientation dependence of the OH+ HBr reaction (2010)
  • Author(s): M. Nakamura, D.-C. Che, P.-Y. Tsai, K.-C. Lin T. Kasai
  • Organizer: 第4回化学反応討論会
  • Place of Presentation: 広島大学
  • Year and Date: 2010-06-03
• [Presentation] OH orientation dependence of the OH+HBr reaction (2010)
  • Author(s): M.Nakamura, D.-C.Che, 他3名
  • Organizer: 第4回化学反応討論会
  • Place of Presentation: 広島大学(広島県)
  • Year and Date: 2010-06-03
• [Presentation] 六極不均一電場を用いた非対称コマ分子の回転状態選別 (2009)
  • Author(s): 蔡徳七、奥乃康弘、笠井俊夫
  • Organizer: 第3回分子科学討論会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2009-09-22
• [Presentation] Collision energy dependence of Br atom formation in the OH+ HBr and the OD+ HBr reactions (2009)
  • Author(s): D.-C. Che, Y. Okuno, T. Kasai
  • Organizer: 第25回化学反応討論会
  • Place of Presentation: 大宮ソニックシティー
  • Year and Date: 2009-06-02
• [Presentation] Collision energy dependence of Br atom formation in the OH+HBr and the OD+HBr reactions (2009)
  • Author(s): D.-C.CHE, et. al.
  • Organizer: 第25回化学反応討論会
  • Place of Presentation: 大宮ソニックシティーホール (大宮)
• [Presentation] 六極不均一電場を用いた非対称コマ分子の回転状態選別 (2009)
  • Author(s): 蔡徳七, 他
  • Organizer: 第3回分子化学討論会
  • Place of Presentation: 大宮ソニックシティーホール (大宮)
• [Book] 物理化学実験法(第5版)第19、20、35章 (2012)
  • Author(s): 蔡徳七
  • Total Pages: 24
  • Publisher: 東京化学同人
• [Book] 物理化学実験法第5版19章、20章、35章 (2012)
  • Author(s): 蔡徳七
  • Total Pages: 24
  • Publisher: 東京化学同人
• [Book] 物理化学実験法 (2011)
  • Author(s): 千原秀昭
  • Total Pages: 21
  • Publisher: 東京化学同人