title: An electron-deficient porphyrin tape.
abstract: Hexakis(pentafluorophenyl)-substituted meso-meso-linked Zn(II)-diporphyrin (9), which was prepared by the acid-catalyzed cross-condensation of 1,1,2,2-tetrapyrroethane (5) with dipyrromethane dicarbinol (6), was converted into meso-meso,β-β,β-β triply linked Zn(II)-diporphyrin 3 by oxidation with 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) and Sc(OTf)(3). Beside the red-shifted absorption spectrum and split first oxidation potential that are common to the triply-linked Zn(II)-diporphyrins, diporphyrin 3 exhibited considerably improved chemical stability owing to a lowered HOMO and good solubility in common organic solvents. The two-photon absorption (TPA) cross-section and S(1)-state lifetime of compound 3 were 1700 GM and 3.3 ps, respectively.
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Mori
authors.forename: Takayuki
authors.initials: T
authors.lastname: Tanaka
authors.forename: Naoki
authors.initials: N
authors.lastname: Aratani
authors.forename: Byung Sun
authors.initials: BS
authors.lastname: Lee
authors.forename: Pyosang
authors.initials: P
authors.lastname: Kim
authors.forename: Dongho
authors.initials: D
authors.lastname: Kim
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Osuka