A study of the thermal and AC impedance properties of N-phenyldithiocarbamate complexes of Zn(II)
Date
2013Author
Onwudiwe, Damian C.
Arfin, Tanvir
Strydom, Christien A.
Kriek, Roelof J.
Metadata
Show full item recordAbstract
Zinc (II) complexes of phenyl dithiocarbamate and para-methylphenyl dithiocarbamate ligands, represented
as [Zn(S2CNHPh)2] and [Zn(S2CNHp-MePh)2], have been synthesized and characterized. The
thermal properties and the ionic conductivity of the complexes were investigated using TG/DSC analysis
and AC impedance spectroscopy. The thermal decomposition of the compounds occurred by a rapid
and huge weight loss, resolvable into two sub-steps, to give zinc sulphide. The AC impedance studies of
the compounds indicate a semicircle within the region of measured frequencies, and a low frequency
inclined spike due to the conduction of the grain. The spike towards the lower frequency range in the
impedance plot is attributed to the conductivity of grains. From the temperature dependent conductivity
studies, it was observed that the conductivity increases with increase in temperature. Line fittings were
used to evaluate the activation energy of the complexes, [Zn(S2CNHPh)2] and [Zn(S2CNHp-MePh)2], and
the values were found to be 0.3986 and 0.0246 eV, respectively, at high-temperature between 373 K and
473 K.
URI
http://hdl.handle.net/10394/13827https://doi.org/10.1016/j.electacta.2013.07.176
https://www.sciencedirect.com/science/article/pii/S0013468613014606