Mimicking photosynthetic two-step energy transfer in cyanine triads assembled into capsules

被引：38

作者：

Dai, ZF ^{[1
]}

Dähne, L ^{[1
]}

Donath, E ^{[1
]}

Möhwald, H ^{[1
]}

机构：

[1] Max Planck Inst Colloids & Interfaces, D-14424 Golm, Germany

来源：

LANGMUIR | 2002年 / 18卷 / 12期

关键词：

D O I：

10.1021/la0255222

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A two-step energy transfer cascade was constructed in the wall of hollow microcapsules by means of defined assembly of three cyanine dyes, thiacyanine (antenna), thiacarbocyanine (receiver and antenna), and indodicarbocyanine (receiver), in the wall plane and perpendicular to it. The efficiency of the energy transfer steps has been measured by fluorescence spectroscopy. The unidirectional energy transfer perpendicular to the surface was smaller than for the lateral one. The antenna dyes on the outer surface of the capsules harvest the light energy and conduct it downhill by Forster resonance energy transfer to the capsule interior in analogy to chloroplasts in nature. However, the obtained efficiency is much smaller, though some improvement was reached by using J-aggregate-forming dyes.

引用

页码：4553 / 4555

页数：3

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