Synthesis, characterization, pyrolysis kinetics and conductivity studies of chloro substituted cobalt phthalocyanines

Achar, B. N. and Mohan Kumar, T. M. and Lokesh, K. S. (2007) Synthesis, characterization, pyrolysis kinetics and conductivity studies of chloro substituted cobalt phthalocyanines. Journal of Coordination Chemistry, 60 (17). pp. 1833-1846. ISSN 1029-0389

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Abstract

Cobalt(II) phthalocyanine (CoPc), cobalt(II) tetrachloro phthalocyanine (CoPcCl4), cobalt(II) octachloro phthalocyanine (CoPcCl8) and cobalt(II) hexadecachloro phthalocyanine (CoPcCl16) are synthesized pure and characterized using elemental analysis, UV-visible, IR-spectroscopy, magnetic susceptibility, X-ray crystallography, and thermogravimetry. All four complexes have monoclinic structure with different crystal lattice constants. Broido's, Coats-Redfern and Horowitz-Metzger relations were employed to calculate the kinetic and activation parameters associated with thermal decomposition of the above complexes. The compounds are analyzed for kinetic parameters, activation energies for decomposition and the Arrhenious pre-exponential factors, in their pyrolysis. Using these factors and standard equations, thermodynamic parameters such as enthalpy, entropy and free energies are calculated. The activation energies are evaluated based on their electrical conductivity conducted over the temperature range 30–200°C. The electrical conductivities observed at 30°C are in the order CoPcCl16 > CoPcCl4 > CoPcCl8 > CoPc. The relevant electrical conductivity data are reported.

Item Type:	Article
Subjects:	C Chemical Science > Chemistry
Divisions:	Department of > Chemistry
Depositing User:	C Swapna Library Assistant
Date Deposited:	23 Sep 2019 10:14
Last Modified:	05 Jul 2022 09:42
URI:	http://eprints.uni-mysore.ac.in/id/eprint/8388

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