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Issue 12, 2017, Issue in Progress
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Infrared dichroism studies and anisotropic photoluminescence properties of poly(para-phenylene vinylene) functionalized reduced graphene oxide

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Abstract

Two methods were used for the synthesis of composites based on reduced graphene oxide (RGO) and poly(para-phenylene vinylene) (PPV) in un-doped and doped state, respectively, i.e. the annealing conversion (AC) of the PPV precursor solution (PS) at 300 °C and the electropolymerization (E) of α,α,α′,α′-tetrabromo-p-xylene. In the case of the E method, a decrease in the distyrylbenzene (DSB) weight onto the RGO sheet surface in favor of PPV in doped state is demonstrated by the s and p polarized IR spectroscopy. The change of the orientation angle of the transition dipole moment vector for the IR bands at 835 and 964 cm−1, in the case of the AC of the PPV PS, is a result of the π–π* interactions between the phenyl groups of PPV and the RGO sheets. The photoluminescence (PL) bands at 2.42 and 2.26 eV indicate the formation of PPV macromolecular chains (MCs) with lengths of 5 and 7–10 repeating units (RUs), respectively. The anisotropic PL studies performed on the composites RGO/PPV in un-doped and doped state, respectively, highlight an increase of the wrapping angle of RGO sheets with PPV MCs with lengths of 5 RUs, when graphene concentration increases.

Graphical abstract: Infrared dichroism studies and anisotropic photoluminescence properties of poly(para-phenylene vinylene) functionalized reduced graphene oxide

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Publication details

The article was received on 07 Nov 2016, accepted on 04 Jan 2017 and first published on 20 Jan 2017


Article type: Paper
DOI: 10.1039/C6RA26445J
Citation: RSC Adv., 2017,7, 6931-6942
  • Open access: Creative Commons BY-NC license
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    Infrared dichroism studies and anisotropic photoluminescence properties of poly(para-phenylene vinylene) functionalized reduced graphene oxide

    M. Baibarac, M. Ilie, I. Baltog, S. Lefrant and B. Humbert, RSC Adv., 2017, 7, 6931
    DOI: 10.1039/C6RA26445J

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