Thermal degradation kinetics and solid state,temperature dependent,electrical conductivity of charge-transfer complex of phenothiazine with chloranil and picric acid |
| |
Authors: | M A Ashok B N Achar |
| |
Affiliation: | (1) Department of Chemistry, University of Mysore, Mysore, 570 006, India |
| |
Abstract: | Temperature dependent electrical conductivity and thermal degradation kinetics of charge-transfer (C-T) complexes of phenothiazine
(PTZ) with p-chloranil (CHL) and picric acid (PA), are reported. These C-T complexes exhibited semiconducting behaviour. The activation
energies for PTZ-CHL and PTZ-PA complexes are calculated based on their electrical conductivities measured over the temperature
ranges 30–110°C and 30–90°C, respectively. And these energies for PTZ-CHL and PTZ-PA are 0·54 eV and 0·75 eV, respectively.
The complexes are analysed for the kinetic parameters like the activation energy for decomposition and the Arrhenius pre-exponential
factors in their pyrolysis region using Broido’s, Coats-Redfern as well as Horowitz-Metzger methods. Using standard equations,
thermodynamic parameters such as enthalpy, entropy and free energies, are calculated. |
| |
Keywords: | Phenothiazine charge-transfer complexes electrical conductivity thermal degradation |
本文献已被 SpringerLink 等数据库收录! |
|