Kinetics on Thermal Decomposition of Iron(III) Complexes of 1,2-Bis(Imino-4’-Antipyrinyl)Ethane with Varying Counter Anions

Autor:	Madhu Thomas, Mamo Gebrezgiabher, Tesfay Gebretsadik, Fikre Elemo, Yosef Bayeh
Rok vydání:	2019
Předmět:	Thermogravimetric analysis chemistry.chemical_compound Schiff base chemistry Ligand Thermal decomposition Kinetics General Earth and Planetary Sciences Physical chemistry Entropy of activation Activation energy Kinetic energy General Environmental Science
Zdroj:	Advances in Chemical Engineering and Science. :1-10
ISSN:	2160-0406 2160-0392
Popis:	A comparative thermal decomposition kinetic investigation on Fe(III) complexes of a antipyrine Schiff base ligand, 1,2-Bis(imino-4’-antipyrinyl)ethane (GA)), with varying counter anions viz. CIO4-, NO3-, SCN-, Cl-, and Br-, has been done by thermogravimetric analysis by using Coats-Redfern equation. The kinetic parameters like activation energy (E), pre-exponential factor (A) and entropy of activation (ΔS) were quantified. On comparing the various kinetic parameters, lower activation energy was observed in second stage as compared to first thermal decomposition stage. The same trend has been observed for pre-exponential factor (A) and entropy of activation (ΔS). The present results show that the starting materials having higher activation energy (E), are more stable than the intermediate products, however; the intermediate products possess well-ordered chemical structure due to their highly negative entropy of activation (ΔS) values. The present investigation proves that the counter anions play an important role on the thermal decomposition kinetics of the complexes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c4dd99f8fa070cf4c029f3cf42f2c8b1 https://doi.org/10.4236/aces.2019.91001 Zobrazit plný text záznamu