title: 3,3'- and 4,4'-biphenylene-bridged subporphyrin dimers.
abstract: 3,3'- and 4,4'-biphenylene-bridged subporphyrin dimers were synthesized by means of a Ni-catalyzed homocoupling reaction. Distinctly red-shifted absorption bands and enhanced fluorescence were observed only for the latter, indicating effective through-bond interactions through a 4,4'-biphenylene bridge, which is not possible for porphyrins.
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University Sakyo-ku, Kyoto 606-8502, Japan.
authors.forename: Yasuhide
authors.initials: Y
authors.lastname: Inokuma
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Osuka