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Poly( p ‐phenylene vinylene) Derivatives with Different Contents of cis ‐Olefins and their Effect on the Optical Properties
Author(s) -
Wang Fangfang,
He Feng,
Xie Zeng Qi,
Li Yu Peng,
Hanif Muddasir,
Li Mao,
Ma Yuguang
Publication year - 2008
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200800047
Subject(s) - photoisomerization , isomerization , photoluminescence , fourier transform infrared spectroscopy , wittig reaction , luminescence , phenylene , photochemistry , chemistry , polymer chemistry , poly(p phenylene vinylene) , fluorescence , materials science , polymer , conjugated system , organic chemistry , catalysis , optics , optoelectronics , physics
Soluble poly[(2,5‐dihexyloxy‐1,4‐phenylene vinylene)‐ alt ‐(2,5‐diphenyl‐1,4‐phenylene vinylene)] (DPO‐PPV) with a majority of cis ‐vinylenes (>87%) has been synthesized by the Wittig reaction. A series of DPO‐PPV derivatives with different contents of cis ‐olefins from approximately 0.05% to 87% was successfully prepared using the photoisomerization technique. On the basis of 1 H NMR, Fourier transform IR (FTIR), ultraviolet (UV), and photoluminescence (PL) spectroscopy, as well as fluorescence quantum efficiency measurements, the effect of cis ‐olefins on the optical properties of the polymer in solution and in film was systemically studied. The results indicate that with a cis ‐configuration above 75%, the luminescence of DPO‐PPV is decayed due to cis ‐ trans isomerization with rotational motions of the double bonds; however, the luminescence is dramatically improved on increasing of the trans ‐configuration.