Dielectric properties and electrical conductivity of the hybrid organic–inorganic polyvanadates (H3N(CH2)4NH3)[V6O14]

Plate-like crystals of the polyvanadate (H3N(CH2)4NH3)[V6O14] have been synthesized via an hydrothermal treatment. X-ray powder diffraction, scanning electron microscope, Fourier transform infrared spectroscopy, electron spin resonance and complex impedance spectroscopy were used to analyze the hybrid material. The frequency dependence of AC conductivity at different temperatures indicates that the CBH model is the probable mechanism for the AC conduction behavior. The conductivity was measured by complex impedance spectroscopy which is equal to 31.10−3 Ω−1 m−1 at 443 K. The Arrhenius diagram is not linear, it presents a rupture situated at 357 K and the activation energies’ average values are 0.22 eV and 0.14 eV, deduced from the Arrhenius relation.