title: Effect of conformational heterogeneity on excitation energy transfer efficiency in directly meso-meso linked Zn(II) porphyrin arrays.
abstract: We have investigated the overall excitation energy relaxation dynamics in linear porphyrin arrays as well as the energy transport phenomena by attaching an energy acceptor to one end of a linear porphyrin array by using steady state and time-resolved spectroscopic measurements. We have revealed that the solvation dynamics as well as the conformational dynamics contributes significantly to the energy relaxation processes of linear porphyrin arrays. Consequently, long porphyrin arrays no longer serve as good energy transmission elements in donor-acceptor linked systems due to conformational heterogeneities which provide the non-radiative deactivation channels as energy quenchers.
authors.affiliation: Department of Chemistry and Center for Ultrafast Optical Characteristic Control, Yonsei University, Seoul 120-749, Korea.
authors.forename: Tae Kyu
authors.initials: TK
authors.lastname: Ahn
authors.forename: Zin Seok
authors.initials: ZS
authors.lastname: Yoon
authors.forename: In-Wook
authors.initials: IW
authors.lastname: Hwang
authors.forename: Jong Kuk
authors.initials: JK
authors.lastname: Lim
authors.forename: Hanju
authors.initials: H
authors.lastname: Rhee
authors.forename: Taiha
authors.initials: T
authors.lastname: Joo
authors.forename: Eunji
authors.initials: E
authors.lastname: Sim
authors.forename: Seong Keun
authors.initials: SK
authors.lastname: Kim
authors.forename: Naoki
authors.initials: N
authors.lastname: Aratani
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Osuka
authors.forename: Dongho
authors.initials: D
authors.lastname: Kim