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

doi:10.1021/jp044274a

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

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	8643-8651
Number of pages	9
Journal	Journal of Physical Chemistry B
Volume	109
Issue number	18
DOIs	https://doi.org/10.1021/jp044274a
Publication status	Published - 2005 May 12

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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title = "Excitation energy migration in a dodecameric porphyrin wheel",

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 F{\"o}rster 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.",

author = "Hwang, {In Wook} and Ko, {Dah Mee} and Ahn, {Tae Kyu} and Yoon, {Zin Seok} and Dongho Kim and Xiaobin Peng and Naoki Aratani and Atsuhiro Osuka",

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doi = "10.1021/jp044274a",

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T1 - Excitation energy migration in a dodecameric porphyrin wheel

AU - Hwang, In Wook

AU - Ko, Dah Mee

AU - Ahn, Tae Kyu

AU - Yoon, Zin Seok

AU - Kim, Dongho

AU - Peng, Xiaobin

AU - Aratani, Naoki

AU - Osuka, Atsuhiro

PY - 2005/5/12

Y1 - 2005/5/12

N2 - 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.

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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JF - Journal of Physical Chemistry B

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Excitation energy migration in a dodecameric porphyrin wheel

Abstract

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