The thermal and detailed kinetic analysis of dipicolinate complexes

Uzun N., Çolak A. T., Emen F. M., KOYUNDERELİ ÇILGI G.

Journal of Thermal Analysis and Calorimetry, vol.124, no.3, pp.1735-1744, 2016 (SCI-Expanded, Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 124 Issue: 3
  • Publication Date: 2016
  • Doi Number: 10.1007/s10973-016-5251-y
  • Journal Name: Journal of Thermal Analysis and Calorimetry
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1735-1744
  • Keywords: 2,6-Pyridinedicarboxylate, Anti-cancer activities, Crystal structure, Thermal–kinetic analysis
  • Manisa Celal Bayar University Affiliated: No

Abstract

The [Cu(pydc)(eim)3]·H2O (1), [Cu(pydc)(4hp)(H2O)] (2) and [Ni(pydc)(3hp)(H2O)2][Cu(pydc)(3hp)(H2O)2]·3H2O (3) complexes (H2pydc = 2,6-pyridinedicarboxylic acid or dipicolinic acid, eim = 2-ethylimidazole, 4hp = 4-hydroxypyridine, 3hp = 3-hydroxypyridine) were studied by thermo-gravimetric analysis at an ambient temperature up to 1000 K under nitrogen atmosphere. The complexes are stable about 350 K, and the decomposition reactions were carried out in seven, three and four stages for the complexes 1, 2 and 3, respectively. Following detailed thermo-gravimetrical analysis of the complexes, the decomposition mechanism was suggested for all complexes. The kinetic analysis of all decomposition stages of each compound was performed except for the final stages. The values of the activation energy, Ea, were obtained using model-free Kissinger–Akahira–Sunose and Flyn–Wall–Ozawa methods for all decomposition stages.