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

被引：78

作者：

Hwang, IW

Park, M

Ahn, TK

Yoon, ZS

Ko, DM

Kim, D ^{[1
]}

Ito, F

Ishibashi, Y

Khan, SR

Nagasawa, Y

Miyasaka, H

Keda, C

Takahashi, R

Ogawa, K

Satake, A

Kobuke, Y

机构：

[1] Yonsei Univ, Ctr Ultrafast Opt Characterist Control, Seoul 120749, South Korea

[2] Yonsei Univ, Dept Chem, Seoul 120749, South Korea

[3] Osaka Univ, Div Frontier Mat Sci, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan

[4] Osaka Univ, Res Ctr Mat Sci Extreme Condit, Toyonaka, Osaka 5608531, Japan

[5] Nara Inst Sci & Technol, Grad Sch Mat Sci, Nara 6300101, Japan

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2005年 / 11卷 / 12期

关键词：

energy transfer; femtosecond transient absorption; fluorescence spectroscopy; polarization anisotropy; porphyrinoids;

D O I：

10.1002/chem.200500069

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 a,, 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 +/- 0.6 ps 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.

引用

页码：3753 / 3761

页数：9

共 75 条

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