This study accentuates the synthesis and characterization of vanillin azo dye conjugate based on naked-eye colored chemodosimeters.Vanillin azo dye conjugate exhibited high selectivity and sensitivity in absorbance for detection of Fe(III) ions in all solvents which can be observed simply by naked eye.Mostly the variation occurs in hypochromic shift of different metals with ligand but Fe(III) ions...