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publication name Potentiometric titrations and thermodynamic parameters of some transition metal ions with citrazinic azo dye derivatives T Y Mohamed and S A YASIN Bulletin of Electrochemistry 17(7), pp. 293-298.
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year 2001
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Abstract

Polyamide derived from azo compound of o-amino phenol coupled with acetyl acetone, maleic anhydride acid and p-phenylene diamine were prepared. The prepared polyamide (PA) was refluxed with metal salts of transition metal ions include, Co+2, Cr+2, Ni+2, Cu+2, Zn+2, Cd+2 and Fe+3 in dimethyl formamide (DMF) in different molar ratios. These complexes were characterized and identified by elemental and thermal analysis, IR, 1H NMR spectra. The data showed that PA ligand coordinates with metal ions in abidentate manner through donating N=N and O-H groups. The metal ions are surrounded by coordinated water molecules and anions to establish the geometrical structure of the complexes. The thermal analysis degradation at different temperatures explained the weight loss of hydrated water and the decompositions of complexes until a constant weight loss of metal oxides is obtained.

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