title: Relationship between two-photon absorption and the pi-conjugation pathway in porphyrin arrays through dihedral angle control.
abstract: Recently, covalently linked or self-assembled porphyrin array systems have attracted much attention for their enhanced two-photon absorption (TPA) behaviors. In this study, we have investigated the TPA properties of various dihedral angle controlled, directly linked porphyrin dimers and arrays to elucidate the relationship between the pi-conjugation pathway and TPA properties. We have demonstrated a strong correlation between pi-conjugation (aromaticity) and TPA properties in porphyrin assemblies.
authors.affiliation: Center for Ultrafast Optical Characteristics Control and Department of Chemistry, Yonsei University, Seoul 120-749, Korea.
authors.forename: Tae Kyu
authors.initials: TK
authors.lastname: Ahn
authors.forename: Kil Suk
authors.initials: KS
authors.lastname: Kim
authors.forename: Deok Yun
authors.initials: DY
authors.lastname: Kim
authors.forename: Su Bum
authors.initials: SB
authors.lastname: Noh
authors.forename: Naoki
authors.initials: N
authors.lastname: Aratani
authors.forename: Chusaku
authors.initials: C
authors.lastname: Ikeda
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Osuka
authors.forename: Dongho
authors.initials: D
authors.lastname: Kim