Abstract
A Ni(II) complex with 2-pyridinecarboxylic acid, [Ni (C 6 H 4 NO 2 ) 2 (H 2 O) 2 ]· 2H 2 O, has been synthesized and its thermal decomposition in N 2 atmosphere has been investigated by TG-DTG and DSC. The results show that the thermal decomposition process of this complex can be divided into two transitions: one is assigned to water loss (involving crystal lattice water and coordinated water) and another to the main decomposition of destroying Ni−N bonds, Ni−O bonds and pyridine ring. Thermal decomposition kinetic analysis indicates that both the transitions are double-step following reactions with different singular reaction types. The kinetic parameters of thermal decomposition have been obtained by means of model-free method together with multivariate non-linear regression.
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