Original Articles
T. N. Chhowala and K. R. Desai
Abstract
A novel series of transition metal complex azo dyes of Cu, Ni and Co have been yielded from 5-Bromo-2{[5- hydroxy-3-methyl]-1-{[2’-methyl-5’-sulfophenyl)-1H-pyrazol-4yl]diazenyl benzoic acid and aqueous solution of metals derived from diazonium salt of 2-Amino-5-Bromo benzoic acid . The molecular formulae of the synthesized compounds were assigned on the basis of elemental analysis while the structures were proposed on the basis of FT IR and 1H NMR. The dyeing assessment of the synthesized dyes was evaluated on nylon fabrics. The percentage dye bath exhaustion on the fibers has been found to be reasonably good and acceptable. Further, the light fastness of the dyed nylon fibers was moderate to very good and washing fastness was good to excellent.