title: Large two-photon absorption (TPA) cross-section of directly linked fused diporphyrins.
abstract: The excited state dynamics and two-photon absorption properties of four novel triply linked porphyrin dimers in toluene have been investigated. The fused porphyrin dimers exhibit extremely increased two-photon absorption cross-section values (12,000-15,000 GM) compared with porphyrin monomers owing to much enhanced pi-electron delocalization throughout the porphyrin dimer ring.
authors.affiliation: Center for Ultrafast Optical Characteristics Control and Department of Chemistry, Yonsei University, Seoul 120-749, Korea.
authors.forename: Deok Yun
authors.initials: DY
authors.lastname: Kim
authors.forename: Tae Kyu
authors.initials: TK
authors.lastname: Ahn
authors.forename: Jung Ho
authors.initials: JH
authors.lastname: Kwon
authors.forename: Dongho
authors.initials: D
authors.lastname: Kim
authors.forename: Takahisa
authors.initials: T
authors.lastname: Ikeue
authors.forename: Naoki
authors.initials: N
authors.lastname: Aratani
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Osuka
authors.forename: Motoyuki
authors.initials: M
authors.lastname: Shigeiwa
authors.forename: Shuichi
authors.initials: S
authors.lastname: Maeda