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제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Excited-State Dynamics of Carotenoids and Retinal studied by Femtosecond Stimulated-Raman Spectroscopy

등록일
2014년 8월 28일 13시 51분 10초
접수번호
0906
발표코드
PHYS.P-405 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 15일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
물리화학
저자 및
공동저자
전명삼, 이세복1, 방윤수1,*
광주과학기술원(GIST) 물리화학부 물리광과학과, Korea
1광주과학기술원(GIST) 물리화학부, Korea
Carotenoids, which play important roles in photosynthesis like light-harvesting or photo-protection, have been known to have very complex excited-state dynamics upon photoexcitation. In order to study the photoinduced relaxation dynamics of carotenoids, transient absorption spectroscopic techniques have often been applied. However, the exact dynamics between the excited states and the ground state of carotenoids are hard to reveal mainly due to generally broad and overlapping electronic transitions and very fast kinetics. In this work, we have set up a femtosecond stimulated Raman spectroscopy (FSRS) based on a Ti:sapphire regenerative amplifier system (50 fs pulsewidth). Broadband Raman probe pulses and picosecond Raman pump pulses are combined with another femtosecond actinyl pump pulses in order to obtain a high temporal (<50 fs) and spectral (< 10 cm-1) resolution in the different stimulated Raman spectra. Time-resolved Raman spectra of carotenoids (β-carotene and 8’-apo-β-caroten-8’-al) and all-trans-retianl will be recorded and analyzed to elucidate their excited state dynamics and structural changes upon photoexcitation.

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