Excitation-energy migration in self-assembled cyclic zinc(II)-porphyrin arrays: A close mimicry of a natural light-harvesting system

In Wook Hwang, Mira Park, Tae Kyu Ahn, Zin Seok Yoon, Dah Mee Ko, Dongho Kim, Fuyuki Ito, Yukihide Ishibashi, Sazzadur R. Khan, Yutaka Nagasawa, Hiroshi Miyasaka, Chusaku Ikeda, Ryoichi Takahashi, Kazuya Ogawa, Akiharu Satake, Yoshiaki Kobuke

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Abstract

The excitation-energy-hopping (EEH) times within two-dimensional cyclic zinc(II)-porphyrin arrays 5 and 6, which were prepared by intermolecular coordination and ring-closing metathesis reaction of olefins, were deduced by modeling the EEH process based on the anisotropy depolarization as well as the exciton-exciton annihilation dynamics. Assuming the number of energy-hopping sites N=5 and 6, the two different experimental observables, that is, anisotropy depolarization and exciton-excition annihilation times, consistently give the EEH times of 8.0 ±0.5 and 5.3±0.6ps through the 1,3-phenylene linkages of 5 and 6, respectively. Accordingly, the self-assembled cyclic porphyrin arrays have proven to be well-defined two-dimensional models for natural light-harvesting complexes.

Original languageEnglish
Pages (from-to)3753-3761
Number of pages9
JournalChemistry - A European Journal
Volume11
Issue number12
DOIs
Publication statusPublished - 2005 Jun 6

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Organic Chemistry

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    Hwang, I. W., Park, M., Ahn, T. K., Yoon, Z. S., Ko, D. M., Kim, D., Ito, F., Ishibashi, Y., Khan, S. R., Nagasawa, Y., Miyasaka, H., Ikeda, C., Takahashi, R., Ogawa, K., Satake, A., & Kobuke, Y. (2005). Excitation-energy migration in self-assembled cyclic zinc(II)-porphyrin arrays: A close mimicry of a natural light-harvesting system. Chemistry - A European Journal, 11(12), 3753-3761. https://doi.org/10.1002/chem.200500069