Directly 2,12- and 2,8-Linked Zn(II) Porphyrin Oligomers: Synthesis, Optical Properties, and Coherence Lengths

Hua-Wei Jiang; Taeyeon Kim; Takayuki Tanaka; Dongho Kim; Atsuhiro Osuka

doi:10.1002/chem.201504039

Directly 2,12- and 2,8-Linked Zn(II) Porphyrin Oligomers: Synthesis, Optical Properties, and Coherence Lengths

Chemistry. 2016 Jan 4;22(1):83-7. doi: 10.1002/chem.201504039. Epub 2015 Dec 2.

Authors

Hua-Wei Jiang¹, Taeyeon Kim², Takayuki Tanaka¹, Dongho Kim³, Atsuhiro Osuka⁴

Affiliations

¹ Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502 (Japan).
² Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul 120-749 (Korea).
³ Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul 120-749 (Korea). dongho@yonsei.ac.kr.
⁴ Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502 (Japan). osuka@kuchem.kyoto-u.ac.jp.

PMID: 26572935
DOI: 10.1002/chem.201504039

Abstract

Directly 2,12- and 2,8-linked Zn(II) porphyrin oligomers were prepared from 2,12- and 2,8-diborylated Zn(II) porphyrin by a cross platinum-induced coupling with a 2-borylated Zn(II) porphyrin end unit followed by a triphenylphosphine (PPh3 )-mediated reductive elimination. Comparative studies on the steady-state absorption and fluorescence spectra and the fluorescence lifetimes led to a conclusion that the exciton in the S1 state is delocalized over approximately four and two Zn(II) porphyrin units for 2,12- and 2,8-linked Zn(II) porphyrin arrays, respectively.

Keywords: absorption; fluorescence; oligomerization; porphyrinoids; synthetic methods; zinc.

Publication types

Research Support, Non-U.S. Gov't