title: β-to-β 2,5-Pyrrolylene-Linked Cyclic Porphyrin Oligomers.
abstract: β-to-β 2,5-Pyrrolylene linked cyclic porphyrin oligomers have been synthesized by Suzuki-Miyaura coupling of 2,5-diborylpyrrole and 3,7-dibromoporphyrin. The cyclic porphyrin oligomers exhibit roughly coplanar structures, strong excitonic coupling, small electrochemical HOMO-LUMO gaps, and ultrafast excitation energy transfer between the neighboring porphyrins via the pyrrolylene bridge.
authors.affiliation: Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), Key Laboratory of Application and Assembly of Organic Functional Molecules, Hunan Normal University, Changsha, 410081, China.
authors.forename: Yutao
authors.initials: Y
authors.lastname: Rao
authors.affiliation: Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul, 03722, Korea.
authors.forename: Jun Oh
authors.initials: JO
authors.lastname: Kim
authors.affiliation: Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul, 03722, Korea.
authors.forename: Woojae
authors.initials: W
authors.lastname: Kim
authors.affiliation: Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), Key Laboratory of Application and Assembly of Organic Functional Molecules, Hunan Normal University, Changsha, 410081, China.
authors.forename: Guangming
authors.initials: G
authors.lastname: Zhong
authors.affiliation: Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), Key Laboratory of Application and Assembly of Organic Functional Molecules, Hunan Normal University, Changsha, 410081, China.
authors.forename: Bangshao
authors.initials: B
authors.lastname: Yin
authors.affiliation: Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), Key Laboratory of Application and Assembly of Organic Functional Molecules, Hunan Normal University, Changsha, 410081, China.
authors.forename: Mingbo
authors.initials: M
authors.lastname: Zhou
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Shinokubo
authors.affiliation: Nara Institute of Science and Technology, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Aratani
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Tanaka
authors.affiliation: Division of Research Computing, Information Technology Services, University of North Carolina, Chapel Hill, North Carolina, 27599, USA.
authors.forename: Shubin
authors.initials: S
authors.lastname: Liu
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan. osuka@kuchem.kyoto-u.ac.jp.
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Osuka
authors.affiliation: Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul, 03722, Korea. dongho@yonsei.ac.kr.
authors.forename: Dongho
authors.initials: D
authors.lastname: Kim
authors.affiliation: Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), Key Laboratory of Application and Assembly of Organic Functional Molecules, Hunan Normal University, Changsha, 410081, China. jxsong@hunnu.edu.cn.
authors.forename: Jianxin
authors.identifier: http://orcid.org/0000-0002-1756-5898
authors.initials: J
authors.lastname: Song
keywords: excitation energy transfer; exciton coupling; nickel; porphyrinoids; porphyrins