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Fluorescence Quenching of Poly[2‐methoxy‐5–(2′‐ethylhexoxy)‐ p ‐phenylene vinylene] (MEH‐PPV) in Solutions
Author(s) -
Li ShaYu,
Xiong Fei,
Zhang HaiRong,
Lu XueFang,
Li Yi,
Yang GuoQiang
Publication year - 2004
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20040220118
Subject(s) - chemistry , photochemistry , quenching (fluorescence) , electron acceptor , fluorescence , acceptor , protonation , electron transfer , phenylene , alkoxy group , electron donor , chloroform , fluorescence spectroscopy , polymer , organic chemistry , catalysis , alkyl , ion , physics , quantum mechanics , condensed matter physics
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.