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Poly(p-phenylene vinylene) Derivatives with Different Contents of cis-Olefins and their Effect on the Optical Properties

✍ Scribed by Fangfang Wang; Feng He; Zeng Qi Xie; Yu Peng Li; Muddasir Hanif; Mao Li; Yuguang Ma

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
211 KB
Volume
209
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

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.

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