3 years ago

Optical, dielectrical properties and conduction mechanism of copolymer (N,N′-bissulphinyl-m-benzenediamine-p-phenylenediamine)

Optical, dielectrical properties and conduction mechanism of copolymer (N,N′-bissulphinyl-m-benzenediamine-p-phenylenediamine)
Copolymer N,N′-bissulphinyl-m-benzenediamine-p-phenylenediamine (SMBD-PPD) is synthesized by using Michael addition on reacting of N,N′-bissulphinyl-m-benzenediamine (SMBD) with p-phenylenediamine at 180–200°C and characterized with various physical and chemical techniques. The number average of molecular weight of SMBD-PPD copolymer is estimated using 1H NMR spectroscopy to be about 3160g/mole. The absorption properties of SMBD-PPD copolymer showed two main absorption peaks at λ=247 and 303nm in methanol solution and at λ=238 and 299nm in ethanol. The energy gap is found in the range of 2.1–2.5eV. SMBD-PPD copolymer showed emission characteristics. The emission spectra appeared at λ=460 and 490nm. The dc and ac electrical conductivities and dielectrical properties at different temperature and frequencies are investigated. The dominant conduction mechanism for ac conductivity in SMBD-PPD copolymer is found to be quantum mechanical tunneling.

Publisher URL: www.sciencedirect.com/science

DOI: S0014305717306468

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