119th General Meeting of the KCS

Type Poster Presentation
Area 물리화학
Room No. 포스터발표장
Time 4월 20일 (목요일) 11:00~12:30
Code PHYS.P-32
Subject Photoinduced Symmetry Breaking Charge Transfer Dynamics of 9,9'-Bianthracene: Solvent Effects
Authors 이창민, 주태하*
POSTECH 화학과, Korea
Abstract Photoinduced symmetry breaking charge transfer (SBCT) is fascinating phenomenon that can be found in biological systems like reaction center of photosynthetic bacteria. Because of its biological importance and applicability, much research about SBCT has been done. 9, 9’-Bianthracene (BA) is a representative model system which undergo SBCT. It has orthogonal torsional angle between two anthracene rings. After photoexcitation, only one anthracene ring is excited and it is called as locally excited state. In polar solvents, charge transfer from one anthracene ring to another ring occurs, making charge transfer state. There is, however, still a lack of understanding about how this reaction is possible and which factors influence it. By obtaining time-resolved fluorescence spectrum of BA in several solvents, it was found that rotational solvation is the most influential factor for the reaction. From the results of the quantum chemical calculation, it is found that the role of the static electric field of solvents is also important in this process.
E-mail lcm1217@postech.ac.kr