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- W2021993077 abstract "The conversion of the precursor into poly(phenylene–vinylene) (PPV) was studied by means of photoelectron spectroscopy (XPS) and electron spin resonance (ESR) on precursor films synthesized from the polymerization of pxylene-tetrahydrophenium halides. The sulfonium precursor containing chlorine or bromine was thermally converted to PPV and analyzed in situ using the spectrometers. It was found by XPS analysis that both halide precursors were thermally converted into polymer in a range of 190–250°C but traces of bromine were still present at >300 °C in the precursor containing Br. Furthermore, a small amount of oxygen in a ketone structure was also present in fully converted films. The ESR results corroborated the XPS experiments, showing a progressive disappearance of the radical distribution related to sulfur sites in a comparable temperature range. A discussion of the conversion process is given in terms of the modification of the core level spectra from XPS and the g distributions from ESR experiments. © 1997 John Wiley & Sons, Ltd." @default.
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- W2021993077 date "1998-02-01" @default.
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- W2021993077 title "Thermal conversion of poly(paraphenylene-vinylene) precursor films: XPS and ESR studies" @default.
- W2021993077 doi "https://doi.org/10.1002/(sici)1099-1581(199802)9:2<101::aid-pat719>3.0.co;2-a" @default.
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