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- W565636043 abstract "A series of poly-(arylene vinylenes) has been investigated by means of Resonance Raman Scattering and infrared absorption. The behaviour of the Raman spectra of compounds with benzene rings (PPV) or with heteroaromatic rings (PTV or PFV) as a function of the excitation wavelength is reported. Valence force-field calculations are performed to assign both Raman and IR vibrational modes and in order to reach better sets of force constants, we use model compounds from which parameters can be, in a first step, transferred to the polymer. In the case of polythienylene vinylene (PTV) for example, thiophene, trans-bis-(2-thienyl) ethylene (TTE) as well as polythiophene and thiophene oligomers are used. For a better consistency all over the series, we find from our calculations that an assignment slightly different from the one proposed in the literature has to be considered, in particular concerning the C-C stretching mode inside the thiophene ring. Results applied to polyfurylene vinylene are in good agreement with experimental data.KeywordsRaman SpectrumVibrational ModeForce ConstantPoly ThiopheneThiophene RingThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves." @default.
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- W565636043 date "1992-01-01" @default.
- W565636043 modified "2023-10-17" @default.
- W565636043 title "Studies of the Vibrational Properties of Poly-(Arylene Vinylenes)" @default.
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- W565636043 doi "https://doi.org/10.1007/978-3-642-84705-9_55" @default.
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