Fluorescence quenching of poly[2-methoxy-5-(2'-ethylhexoxy)-p-henylene vinylene] (MEH-PPV) in solutions

被引：0

作者：

Li, SY ^{[1
]}

Fei, X

Zhang, HR

Lu, XF

Yi, L

Yang, GQ

机构：

[1] Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Key Lab Photochem, Beijing 100080, Peoples R China

[2] Acad Sinica, Tech Inst Phys & Chem, Beijing 100101, Peoples R China

来源：

CHINESE JOURNAL OF CHEMISTRY | 2004年 / 22卷 / 01期

关键词：

MEH-PPV; fluorescence quenching; electron acceptor; singlet oxygen; protonic acid;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Fluorescence quenching processes of poly[2-methoxy-5-(2'ethyl-hexoxy)-p-phenylene vinylene] (MEH-PPV) in solution by electron acceptors, O-2 and acid, have been studied. Static quenching of the fluorescence from MEH-PPV by an electron acceptor (DDQ or TCNE) occurs due to electron transfer from MEH-PPV to the electron acceptor and this electron transfer quenching can be promoted by chloroform. Photooxidation takes place in the MEH-PPV solution and singlet oxygen is an intermediate in the photooxidation, according to the results of ESR spectroscopy. Acid also plays an important role in the fluorescence quenching process of MEH-PPV, by the protonation of the alkoxy groups in the molecular chain.

引用

页码：80 / 84

页数：5

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