title: Synthesis of direct β-to-β linked porphyrin arrays with large electronic interactions: branched and cyclic oligomers.
abstract: Direct β-to-β linked branched and cyclic porphyrin trimers and pentamers have been synthesized by the Suzuki-Miyaura coupling of β-borylporphyrins and β-bromoporphyrins. The cyclic porphyrin trimer, the smallest directly linked cyclic porphyrin wheel to date, and its twined pentamer, exhibit small electrochemical HOMO-LUMO gaps, broad nonsplit Soret bands, and red-shifted Q-bands, thus indicating large electronic interactions between the constituent porphyrin units.
authors.affiliation: Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), Hunan Normal University, Changsha 410081 (China).
authors.forename: Hao
authors.initials: H
authors.lastname: Cai
authors.forename: Keisuke
authors.initials: K
authors.lastname: Fujimoto
authors.forename: Jong Min
authors.initials: JM
authors.lastname: Lim
authors.forename: Chaojie
authors.initials: C
authors.lastname: Wang
authors.forename: Weiming
authors.initials: W
authors.lastname: Huang
authors.forename: Yutao
authors.initials: Y
authors.lastname: Rao
authors.forename: Senmiao
authors.initials: S
authors.lastname: Zhang
authors.forename: Hui
authors.initials: H
authors.lastname: Shi
authors.forename: Bangshao
authors.initials: B
authors.lastname: Yin
authors.forename: Bo
authors.initials: B
authors.lastname: Chen
authors.forename: Ming
authors.initials: M
authors.lastname: Ma
authors.forename: Jianxin
authors.initials: J
authors.lastname: Song
authors.forename: Dongho
authors.initials: D
authors.lastname: Kim
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Osuka
mesh_terms: D002384:Catalysis; D018360:Crystallography, X-Ray; D003500:Cyclization; D004583:Electrons; D004735:Energy Transfer; D007495:Iridium; D008968:Molecular Conformation; D011166:Porphyrins / Q000138:chemical synthesis* / Q000737:chemistry; D011789:Quantum Theory
chemical_list: D011166:Porphyrins; D007495:Iridium
keywords: cross-coupling; cyclization; energy transfer; porphyrinoids; structure elucidation