Relating conformation and photophysics in single MEH-PPV chains

被引：90

作者：

Ebihara, Yohei ^{[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 B | 2008年 / 112卷 / 40期

关键词：

D O I：

10.1021/jp806963u

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 use a novel fluorescence polarization microscope in combination with molecular dynamics calculations to determine the conformation of individual isolated chains of the conjugated polymer MEH-PPV. We found a narrow distribution of defect cylinder conformations in a poor-solvent matrix and two types of defect coil conformations in a good-solvent matrix. The conformations were related to photophysical properties of MEH-PPV by measuring fluorescence intermittency on the same chains. We obtained direct evidence that the photophysics is determined by the chain conformations and that small changes in the polymer microscopic structure can qualitatively affect the photophysical properties.

引用

页码：12575 / 12578

页数：4

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