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학술발표회초록보기

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  • 09월 08일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Guest-induced Switching of Energy Transfer in a Porphyrin Triad

등록일
2015년 9월 3일 10시 28분 25초
접수번호
1183
발표코드
ORGN.P-406 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 15일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
유기화학
저자 및
공동저자
임다정, 윤홍식, 장우동*
연세대학교 화학과, Korea

Natural photosynthetic light-harvesting systems have not only high efficient in energy transfer but also continuous conversion of light energy to other forms. Natural light-energy conversion is initiated by photon absorption of complex molecular assemblies called light-harvesting antenna complexes (LHC). Well-ordered three-dimensional multiporphyrin arrays in LHC facilitate effective photon capture and energy migration to the reaction center, which is composed of a non-covalently associated pair of chromophore units. Based on the process of natural photosynthetic systems, many chemists have reported highly efficient energy transfer. However, few studies have been conducted to control energy transfer pathway by guest binding. In this study, triazole-bearing porphyrin triad (PZnTz-2PFB) consists of central zinc porphyrin (PZnTz) and two freebase porphyrin wings (PFB). PZnTz-2PFB exhibited unique photoluminescence switching phenomena by guest binding. As a result of fluorescence spectroscopy, PZnTz-2PFB exhibited the emission of freebase porphyrin regardless of excitation wavelength, and this result suggests that effective energy transfer takes place from PZn to PFB. After the addition of cyanide, emission spectrum of PZnTz-2PFB was consistent with the emission of CN- complex of PZn whether PFB or PZn excitation.


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