Synthesis and Evaluation of Iron (III)-Red Onion Skin Extract Azo Complexes as Pigments for Surface Coatings in Oilfield Environment

Red Onion skin extract (ROSE) -azo compound of 2-aminobenzoic acid and Iron (III) metal complex of the azo compound (Fe-ABmROSE) were synthesized and characterized using FT-IR spectroscopy, UV-Visible absorption spectroscopy and Scanning electron microscopy. The IR Spectra showed the values of N=N- stretching frequency of 1496.81cm-1 at 1500 cm-1 in ABmROSE. This stretching frequency is absent in the Fe-ABmROSE. This is an indication of the involvement of the N=N- bond in coordination to the metal. ABmROSE shows an absorption maximum at 560.1 nm. This band was shifted to 310 nm in Fe-ABmROSE. This suggests an interaction between the Fe and the azo compound.