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  • 09월 10일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Raman-pump power dependent artifact signal of trans-stilbene

등록일
2019년 8월 29일 16시 45분 05초
접수번호
1862
발표코드
PHYS.P-217 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 17일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
Physical Chemistry
저자 및
공동저자
Dong-gu Kang, David W. McCamant1, Sang Kyu Kim*
Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
1Department of Chemistry, University of Rochester, United States
※ 국외소속으로 등록된 저자의 승인여부는 최소 3일이내 발표자 email로 알려드립니다.
승인 1건
Femtosecond stimulated Raman spectroscopy (FSRS) is able to monitor the transient vibration modes of molecules within sub-picosecond time scale after photoexcitation. Especially, trans-stilbene and its derivatives which have trans-cis photoisomerization reaction have been variously studied because of large extinction coefficient and Raman activity. We have built above optical setup with a feasible resonant condition (Sn - S1 state) and we performed Raman-pump power dependent experiment of trans-stilbene derivatives with a narrow spectral-resolution (sub-10 cm-1) and a short time-resolution (80 fs). Though the first decay component assigned to intramolecular vibrational redistribution is reported by some groups, we revealed that it is the inevitable artifact of population depletion with high Raman-pump power. To support this results, we also had a non-resonant Raman experiment with Etalon that have a exponential pulse with a cavity lifetime in the time-domain. Therefore, I will present the optimized process for obtaining power-sensitive FSRS signal in resonance condition.

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