| Fluorescence Quenching of Poly[2-methoxy-5-(2'-ethylhexoxy)-p-phenylene vinylene](MEH-PPV) in Solutions |
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| 作者姓名： | 李沙瑜 熊飞 张海蓉 卢雪芳 李嫕 杨国强 |
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| 作者单位： | Key Laboratory of Photochemistry，Center of Molecular Science，Institute of Chemistry，Chinese Academy of Sciences，Key Laboratory of Photochemistry，Center of Molecular Science，Institute of Chemistry，Chinese Academy of Sciences，Key Laboratory of Photochemistry，Center of Molecular Science，Institute of Chemistry，Chinese Academy of Sciences，Key Laboratory of Photochemistry，Center of Molecular Science，Institute of Chemistry，Chinese Academy of Sciences，Technical Institute of Physics and Chemistry，Chinese Academy of Sciences，Key Laboratory of Photochemistry，Center of Molecular Science，Institute of Chemistry，Chinese Academy of Sciences Beijing 100080，China，Beijing 100080，China，Beijing 100080，China，Beijing 100080，China，Beijing 100101，China，Beijing 100080，China |
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| 基金项目： | the National Natural Science Foundation of China (No. 20173066) and the Major State Basic Research Development Program of China (No. G2000078100). |
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| 摘 要： | Introduction Poly(1,4-phenylene vinylene) (PPV) has been the subject of explosive interest in these years. It has poten-tial applications in light-emitting diode, light emitting electrochemical cell and plastic laser.1-4 To improve its solubility and optical properties substituents are intro-duced to the PPV main chain. Poly2-methoxy-5-(2'-ethylhexoxy)-p-phenylene vinylene] (MEH-PPV) is one of derivatives with alkoxy groups on phenyl rings. It exhibits superior solubility in organic sol…
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Fluorescence Quenching of Poly[2-methoxy-5-(2'-ethylhexoxy)-p-phenylene vinylene](MEH-PPV) in Solutions |
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| LI,Sha-Yua XIONG,Feia ZHANG,Hai-Ronga LU,Xue-Fanga LI,Yi,b YANG,Guo-Qiang,a a Key Laboratory of Photochemistry,Center of Molecular Science.Fluorescence Quenching of Poly[2-methoxy-5-(2''''-ethylhexoxy)-p-phenylene vinylene](MEH-PPV) in Solutions[J].Chinese Journal of Chemistry,2004(1). |
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| Authors: | LI Sha-Yua XIONG Feia ZHANG Hai-Ronga LU Xue-Fanga LI Yi b YANG Guo-Qiang a a Key Laboratory of Photochemistry Center of Molecular Science |
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| Institution: | LI,Sha-Yua XIONG,Feia ZHANG,Hai-Ronga LU,Xue-Fanga LI,Yi**,b YANG,Guo-Qiang*,a a Key Laboratory of Photochemistry,Center of Molecular Science,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080,China b Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100101,China |
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| Abstract: | Fluorescence quenching processes of poly2-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. |
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| Keywords: | MEH-PPV fluorescence quenching electron acceptor singlet oxygen protonic acid |
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