Excitation energy migration in a dodecameric porphyrin wheel

In Wook Hwang, Dah Mee Ko, Tae Kyu Ahn, Zin Seok Yoon, Dongho Kim, Xiaobin Peng, Naoki Aratani, Atsuhiro Osuka

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35 Citations (Scopus)

Abstract

Intramolecular excitation energy hopping (EEH) time within a dodecameric porphyrin wheel C6ZA, in which six meso-meso linked zinc(II) diporphyrin (Z2) subunits are bridged by 1,3-phenylene spacers, is deduced by a Förster energy hopping model based on S1-S1 exciton-exciton annihilation and anisotropy depolarization. Under the assumption that the energy hopping sites are six Z2 subunits, two different observables (e.g., exciton-exciton annihilation and anisotropy depolarization times) consistently give the EEH time of 4.0 ± 0.4 ps via 1,3-phenylene spacer of C6ZA, which is faster than 9.4 ps of linear 2Z2 (1,3-phenylene-linked zinc(II) tetraporphyrin). As a consequence, C6ZA serves as a well-defined two-dimensional model for a light-harvesting complex.

Original languageEnglish
Pages (from-to)8643-8651
Number of pages9
JournalJournal of Physical Chemistry B
Volume109
Issue number18
DOIs
Publication statusPublished - 2005 May 12

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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    Hwang, I. W., Ko, D. M., Ahn, T. K., Yoon, Z. S., Kim, D., Peng, X., Aratani, N., & Osuka, A. (2005). Excitation energy migration in a dodecameric porphyrin wheel. Journal of Physical Chemistry B, 109(18), 8643-8651. https://doi.org/10.1021/jp044274a