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제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Tracing down the exciton relaxation dynamics in macrocyclic oligothiophenes

등록일
2012년 2월 22일 21시 39분 08초
접수번호
1375
발표코드
PHYS.P-509 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 25일 (수요일) 18:00~21:00
발표형식
포스터
발표분야
물리화학
저자 및
공동저자
양재성
연세대학교 화학과, Korea
Functional oligothiophenes have attracted comprehensive interest in the field of materials sciences and have been advanced to be among the most frequently used π-conjugated materials, in particular as active components in organic electronic devices and molecular electronics. The traditional linear oligothiophenes suffer from undesired perturbing end effects on the conjugated chain. To circumvent this problem, in recent years, a multitude of size- and shape-persistent macrocyclic oligothiophenes has been developed and characterized. These macrocycles, in comparison to usual linear oligomers and polymers, have the distinct advantage to ideally combine an infinite defect free π-conjugated chain of an idealized polymer with the advantages of a structurally well-defined oligomer, but excluding perturbing end effects. In this regard, we have prepared a series of macrocyclic oligothiophens, 5T-N (N = 2, 3, 4, 5, and 6), consisting of 2,5-thienylene, ethynylene, and vinylene units. Single-molecule photophysical properties of 5T-N have been explored with the single-molecule fluorescence detection techniques to reveal size dependency of their properties. We deal with fluorescence dynamics of them such as photobleaching sequences, fluorescence lifetimes, and collective off-times, in conjunction with excitation energy migration efficiencies.

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