title: Synthesis of doubly beta-to-beta 1,3-butadiyne-bridged diporphyrins: enforced planar structures and large two-photon absorption cross sections.
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Japan.
authors.forename: Ichiro
authors.initials: I
authors.lastname: Hisaki
authors.forename: Satoru
authors.initials: S
authors.lastname: Hiroto
authors.forename: Kil Suk
authors.initials: KS
authors.lastname: Kim
authors.forename: Su Bum
authors.initials: SB
authors.lastname: Noh
authors.forename: Dongho
authors.initials: D
authors.lastname: Kim
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Shinokubo
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Osuka