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Comparison of electrical and photoluminescence properties of synthesized poly o-phenylenediamine and its sio2 nanocomposites

Author Affiliations

  • 1Department of Chemistry, Auxilium College, katpadi, Vellore-6, India
  • 2Department of Chemistry, Auxilium College, katpadi, Vellore-6, India

Res.J.chem.sci., Volume 7, Issue (9), Pages 1-7, September,18 (2017)

Abstract

Poly orthophenylenediamine and their silicon dioxide nanocomposites were synthesize using different concentration of SiO2 nanoparticles like 5%, 10% and 15% by oxidative polymerization method using ammonium persulphate as an oxidant in the presence of HCl. The formation of polymers and their nanocomposites were confirmed from the UV-vis and IR spectroscopy and from the change of polymer colour from red to brown and found to exhibit band at 446nm in UV-visible spectroscopy. The crystalline nature of the synthesized polymers and their nanocomposites were determined from the XRD studies. The SEM images of the polymer recorded at different magnification shows rod like structure and found to change to flake like structures in the polymer nanocomposites synthesized at different concentration of SiO2 nanoparticles. The TEM recorded at different angle confirms the core shell structures. The stability of the synthesized polymer and its nanocomposites were substantiated from thermal studies carried out using TGA, DTA and DSC. The comparative electrical conductivities of the polymer and its nanocomposites shows semiconducting nature and the conductivities are found to be higher for the nano composites than the polymer and the electrical conductivity was found to be higher for the polymer nanocomposite synthesized with 15% of SiO2. Photoluminescence is the property which involves the process of photon excitation followed by photon emission. The PL spectrum of polymers and their nanocomposites were recorded with 5, 10, and 15% SiO2 nanoparticles and are found to fall under the green light emission region. Thus the synthesized polymer and its nanocomposites can be used as a green light emitter in different applications.

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