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  • 03월 07일 19시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제107회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Photodissociation dynamics: multidimensional view

2011년 3월 1일 18시 07분 54초
PHYS1-1 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 13시 : 50분
물리화학 - Fundamentals and Applications of Biomaterials
저자 및
KAIST 화학과, Korea
Here, we present several cases of photodissociation dynamics, where the conical intersection plays an important role along the overall reaction pathway. For reactions on electronically excited states, where transitions occur between adiabatic surfaces, nonadiabatic transitions are essential. The conical intersection where two different adiabatic surfaces touch has been widely accepted as the dynamic funnel for efficient nonadiabatic transitions, and yet the direct experimental probing of the conical intersection has been rare. Here, we investigate the photodissociation of thioansiole and thiophenol, and observe the striking dependence of the reaction product yields on the photoexcitation energy. This results from the unique dynamic process occurring near the conical intersection. The location of the observed resonance on multi-dimensional potential energy surface reveals the nuclear configuration of the conical intersection and its dynamic role in the nonadiabatic transition. Slow electron velocity map imaging method has been employed for the investigation of the predissociation of methylamine on the first excited state. High energy resolved photoelectron images show not only the morphology but also electronic character of the intermediate state which is strongly distorted along the reaction pathway. Preliminary results on the molecular manipulation in the strong electric field will be also briefly introduced.