Fluorescence Quenching of Poly[2-methoxy-5-(2'-ethylhexoxy)-p-phenylene vinylene](MEH-PPV) in Solutions

被引：0
|
作者：
李沙瑜
熊飞
张海蓉
卢雪芳
李嫕
杨国强
机构：
[1] Key Laboratory of Photochemistry
[2] Center of Molecular Science
[3] Institute of Chemistry
[4] Chinese Academy of Sciences
[5] Technical Institute of Physics and Chemistry
[6] Chinese Academy of Sciences Beijing 100080
[7] China
[8] Beijing 100101
来源：
ChineseJournalofChemistry | 2004年 / 01期
基金：
中国国家自然科学基金;
关键词：
MEH-PPV; fluorescence quenching; electron acceptor; singlet oxygen; protonic acid;
D O I：
暂无
中图分类号：
O631 [高分子物理和高分子物理化学];
学科分类号：
摘要：
Fluorescence quenching processes of poly[2-methoxy-5-(2’ethyl-hexoxy)-p-phenylene vinylene] (MEH-PPV) in solution by electron acceptors, O2 and acid, have been studied. Static quenching of the fluorescence fromMEH-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 proto-nation of the alkoxy groups in the molecular chain.
引用
收藏
页码：80 / 84 +3
页数：6
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