Supramolecular porphyrin assemblies through amidinium-carboxylate salt bridges and fast intra-ensemble excited energy transfer

被引：50

作者：

Otsuki, J

Iwasaki, K

Nakano, Y

Itou, M

Araki, Y

Ito, O

机构：

[1] Nihon Univ, Coll Sci & Technol, Chiyoda Ku, Tokyo 1018308, Japan

[2] Tohoku Univ, Inst Multidiciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2004年 / 10卷 / 14期

关键词：

energy transfer; porphyrinoids; salt bridges; supramolecular chemistry; through-bond mechanism;

D O I：

10.1002/chem.200400152

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Well-defined supramolecular assemblies of Zn and free-base porphyrins are constructed through the formation of amidinium-carboxylate salt bridges. A one-to-one donor-acceptor pair and a four-to-one antenna-type assembly a re investigated. The steady-state and time-resolved fluorescence measurements unequivocally showed that efficient singlet-singlet excited energy transfer from the Zn-porphyrin complex to the free-base porphyrin takes place in these assemblies. Indeed, the observed energy-transfer rates in both types of assemblies are much faster than those the Forster mechanism would suggest, implying the involvement of an intermolecular through-bond mechanism.

引用

收藏

页码：3461 / 3466

页数：6

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