Complete Suppression of Blinking and Reduced Photobleaching in Single MEH-PPV Chains in Solution

被引：30

作者：

Onda, Suguru ^{[1
]}

Kobayashi, Hiroyuki ^{[1
]}

Hatano, Tatsuhiko ^{[1
]}

Furumaki, Shu ^{[1
]}

Habuchi, Satoshi ^{[1
]}

Vacha, Martin ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, Tokyo 1528552, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2011年 / 2卷 / 21期

基金：

日本学术振兴会;

关键词：

CONJUGATED POLYMER-CHAINS; MOLECULE SPECTROSCOPY; ENERGY-TRANSFER; CONFORMATION; PHOTOPHYSICS; DEPENDENCE; MATRICES;

D O I：

10.1021/jz2012512

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 report photophysical properties of individual chains of the conjugated polymer MEH-PPV in a concentrated solution of polystyrene. MEH-PPV chains diffusing freely in the solution show no fluorescence blinking and reduced photobleaching. Adsorption of the chains onto a substrate in the solution leads to 34% decrease in fluorescence intensity (quantum efficiency), fivefold increase in the rate of photobleaching and appearance of blinking. The blinking is often a two-state process caused by a reversible interaction with a single quencher. The interaction causes quenching of a substantial length of the extended MEH-PPV chain.

引用

页码：2827 / 2831

页数：5

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