標題: Transition State in a Prevented Proton Transfer Observed in Real Time
作者: Iwakura, Izumi
Yabushita, Atsushi
Kobayashi, Takayoshi
電子物理學系
Department of Electrophysics
公開日期: 15-二月-2011
摘要: Direct observation of the molecular structural change during chemical reactions including transition states is desirable to fully clarify the mechanism of chemical reactions. Time-dependent frequency variations in molecular vibration modes reflect structural change in transition states. Ultrafast changes in molecular structure during bond breaking and bond reformation can be clearly visualized using ultrafast spectroscopy. This study elucidated molecular structural information in states along the chemical reaction including transition state in the proton transfer of indigodisulfonate salt. The photoexcited proton transfer was found to follow a stepwise pathway. The monoalcohol intermediate generated by the proton transfer was found to return immediately to the original indigo without proton-transfer configuration. This back reaction of this is the reason for the ultra-photostability of indigo over extremely long exposure to light. This shows that real-time vibrational spectroscopy by a few femtosecond pulse laser enables the observation of dynamic behavior of molecular vibrations during chemical reactions, leading to the clarification of reaction mechanisms or the development of new chemical reactions.
URI: http://dx.doi.org/10.1246/bcsj.20100269
http://hdl.handle.net/11536/9297
ISSN: 0009-2673
DOI: 10.1246/bcsj.20100269
期刊: BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
Volume: 84
Issue: 2
起始頁: 164
結束頁: 171
顯示於類別:期刊論文