Time-frequency two-dimensional mapping of rapid energy transfer in light-harvesting star-shaped dendrimers

被引：6

作者：

Ishida, A. ^{[1
]}

Makishima, Y. ^{[1
]}

Okada, A. ^{[2
]}

Akai, I. ^{[3
]}

Kanemoto, K. ^{[2
]}

Karasawa, T. ^{[2
]}

Kimura, M. ^{[4
]}

Takeda, J. ^{[1
]}

机构：

[1] Yokohama Natl Univ, Dept Phys, Yokohama, Kanagawa 2408501, Japan

[2] Osaka City Univ, Dept Phys, Osaka 5588585, Japan

[3] Kumamoto Univ, Shock Wave & Condensed Matter Res Ctr, Kumamoto 8608555, Japan

[4] Shinshu Univ, Dept Funct Polymer Sci, Ueda, Nagano 3868567, Japan

来源：

JOURNAL OF LUMINESCENCE | 2008年 / 128卷 / 5-6期

基金：

日本学术振兴会;

关键词：

femtosecond; imaging spectroscopy; dendrimer; rapid energy transfer;

D O I：

10.1016/j.jlumin.2007.11.064

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Rapid energy transfer dynamics in light-harvesting small dendrimers (star-shaped stilbenoid phthalocyanine: SSS1-Pc) having oligo (p-phenylenevinylene) peripheries was studied by real-time pump-probe imaging spectroscopy implemented on a single-shot basis. Using this method, we could successfully map the time-frequency two-dimensional (2D) image of the transient absorption of SSS1-Pc with a very short accumulation time. Under the selective excitation of the peripheries, the 2D image obtained clearly shows the transient absorption as well as the ground-state bleaching due to the energy transfer to the core with a fast rise time of similar to 0.3 ps. This fast rise implies that the rapid energy transfer from the peripheries to the core takes place through the short-range interactions due to the overlap of wave functions between the excited states of the peripheries and the core. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：771 / 773

页数：3

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