Kinetic analysis of thermal decomposition of some Co-complexes of three unsymmetrical vic-dioximes ligands


Sahin Ö., Tas E., Dolas H.

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, cilt.89, sa.1, ss.123-131, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 89 Sayı: 1
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1007/s10973-005-7019-7
  • Dergi Adı: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.123-131
  • Anahtar Kelimeler: Arrhenius parameter, Co(II) complexes, kinetic analysis, model-fitting and model-free methods, vic-dioxime
  • İstanbul Teknik Üniversitesi Adresli: Hayır

Özet

The thermal decomposition of three new reagent cyclohexylamine-p-tolylglyoxime (L1H2), tertiarybutyl amine-p-tolylglyoxime (L2H2) and secondary butylamine-p-tolylglyoxime (L3H2 and their Co-complexes were studied by both isothermal and nonisothermal methods. As expected, the complex structure of Co-complexes, different steps with different activation energies were realized in decomposition process. Model-fitting and model-free kinetic approaches were applied to nonisothermal and isothermal data. The kinetic triplet (f(alpha), A and E) related to nonisothermal model-fitting method can not be meaningfully compared with values obtained from isothermal method. The complex nature of the multi-step process of the studied compounds was more easily revealed using a wider temperature range in nonisothermal isoconversional method.