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- W2024674124 abstract "In this work, we present a characterization study of the electronic and vibrational properties of parasexiphenyl by means of luminescence, optical absorption and Resonant Raman Scattering (RRS) measurements. Both undoped and p-doped compounds have been investigated. The oxidation of a thin film of parasexiphenyl by AsF5 was followed by Raman Scattering and UV-visible absorption measurement. Optical absorption spectra show localized states within the gap at 1.25 and 3 eV, signature of bipolarons. Photoluminescence studies carried out with an excitation wavelength at 3,06 eV Which is 406.7 nm show only an intrinsic luminescence signal which strongly decreases in intensity with doping and characterized by a structured band with a maximum at 2.66 eV. Finally, we present and discuss results obtained in RRS after doping. By using a dynamical model based on valence force field, we show that the modifications are consistent with the presence of a quinoïd structure along the chains." @default.
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- W2024674124 date "1993-04-01" @default.
- W2024674124 modified "2023-10-16" @default.
- W2024674124 title "Optical characterization of parasexiphenyl : A model compound of polyparaphenylene" @default.
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- W2024674124 doi "https://doi.org/10.1016/0379-6779(93)90814-d" @default.
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