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

Research output: Contribution to journalArticle

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

Fingerprint

Excitation energy
Porphyrins
wheels
porphyrins
Excitons
Wheels
excitons
Depolarization
depolarization
spacers
excitation
Zinc
Anisotropy
zinc
anisotropy
energy
two dimensional models
LDS 751

All Science Journal Classification (ASJC) codes

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

Cite this

Hwang, I. W., Ko, D. M., Ahn, T. K., Yoon, Z. S., Kim, D., Peng, X., ... 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
Hwang, In Wook ; Ko, Dah Mee ; Ahn, Tae Kyu ; Yoon, Zin Seok ; Kim, Dongho ; Peng, Xiaobin ; Aratani, Naoki ; Osuka, Atsuhiro. / Excitation energy migration in a dodecameric porphyrin wheel. In: Journal of Physical Chemistry B. 2005 ; Vol. 109, No. 18. pp. 8643-8651.
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Hwang, IW, Ko, DM, Ahn, TK, Yoon, ZS, Kim, D, Peng, X, Aratani, N & Osuka, A 2005, 'Excitation energy migration in a dodecameric porphyrin wheel', Journal of Physical Chemistry B, vol. 109, no. 18, pp. 8643-8651. https://doi.org/10.1021/jp044274a

Excitation energy migration in a dodecameric porphyrin wheel. / Hwang, In Wook; Ko, Dah Mee; Ahn, Tae Kyu; Yoon, Zin Seok; Kim, Dongho; Peng, Xiaobin; Aratani, Naoki; Osuka, Atsuhiro.

In: Journal of Physical Chemistry B, Vol. 109, No. 18, 12.05.2005, p. 8643-8651.

Research output: Contribution to journalArticle

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AU - Hwang, In Wook

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AU - Ahn, Tae Kyu

AU - Yoon, Zin Seok

AU - Kim, Dongho

AU - Peng, Xiaobin

AU - Aratani, Naoki

AU - Osuka, Atsuhiro

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AB - 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.

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