Effect of conformational heterogeneity on excitation energy transfer efficiency in directly meso-meso linked Zn(II) porphyrin arrays

被引：37

作者：

Ahn, TK

Yoon, ZS

Hwang, IW

Lim, JK

Rhee, H

Joo, T

Sim, E

Kim, SK

Aratani, N

Osuka, A ^{[1
]}

Kim, D

机构：

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

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

[3] Seoul Natl Univ, Sch Chem, Seoul 151747, South Korea

[4] Pohang Univ Sci & Technol, Dept Chem, Pohang 790784, South Korea

[5] Kyoto Univ, Dept Chem, Sakyo Ku, Kyoto 6068502, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 22期

关键词：

D O I：

10.1021/jp050662g

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have investigated the overall excitation energy relaxation dynamics in linear porphyrin arrays as well as the energy transport phenomena by attaching an energy acceptor to one end of a linear porphyrin array by using steady state and time-resolved spectroscopic measurements. We have revealed that the solvation dynamics as well as the conformational dynamics contributes significantly to the energy relaxation processes of linear porphyrin arrays. Consequently, long porphyrin arrays no longer serve as good energy transmission elements in donor-acceptor linked systems due to conformational heterogeneities which provide the nonradiative deactivation channels as energy quenchers.

引用

页码：11223 / 11230

页数：8

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