Non‐isothermal Kinetics of the First‐stage Decomposition Reaction of the Complex of Terbium p‐Methylbenzoate with 1,10‐Phenanthroline

Abstract

AbstractThe thermal behavior of Tb2 (p‐MBA)6(phen)2 (p‐MBA=p‐methylbenzoate; phen=1,10‐phenanthroline) in a static air atmosphere was investigated by TG‐DTG, SEM and IR techniques. The thermal decomposition of the Tb2(p‐MBA)6(phen)2 occurred in three consecutive stages at TP of 354, 457 and 595 °C. By Malek method, RO (n<1) was defined as kinetic model for the first‐step thermal decomposition. The activation energy (E) of this step is 170.21 kJ·mol‐1, the enthalpy of activation (ΔH≠) 164.98 kJ·mol‐1, the Gibbs free energy of activation (ΔG≠) 145.04 kJ·mol‐1, the entropy of activation (ΔS≠) 31.77 J·mol‐1·K‐1, and the pre‐exponential factor (A) 1015.21 s‐1.