title: Observation of quantum coherence for recurrence motion of exciton in anthracene dimers in solution.
abstract: The quantum beat signal associated with recurrence motion of exciton was observed for two types of anthracene dimers connected through a phenyl ring, on femtosecond fluorescence anisotropy decay. The time periods of oscillation were 0.3-0.9 ps, which correspond to exciton interactions of 30-50 cm-1, and the damping time constants (dephasing time) were 0.7-1.0 ps. The results show that the coherent aspect in photochemical processes is observable even in solution at room temperature, if one employs dimers of rigid structures.
authors.affiliation: Department of Molecular Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan. yamiw@eng.hokudai.ac.jp
authors.forename: Iwao
authors.initials: I
authors.lastname: Yamazaki
authors.forename: Naoki
authors.initials: N
authors.lastname: Aratani
authors.forename: Seiji
authors.initials: S
authors.lastname: Akimoto
authors.forename: Tomoko
authors.initials: T
authors.lastname: Yamazaki
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Osuka