Synthesis of New Azo Reagent for Determination pf Pd(II), Ag(I) and Applied to Enhance the Properties of Silver Nano ParticlesAuthor(s): Aayad Ammar Sayhood and Hussain J. Mohammed
This study describes the use of novel azo dye reagent, (L), (E)-5-(4-[(1,5-dimethyl-3-oxo-2-phenyl- 2, 3-dihydro-1H-pyrazol-4-yl)diazenyl)phenyl]-5-ethylpyrimxline-2,4,6 (1H, 3H, 5H)-trione, have been synthesized between phenoparpetal with 4-aminoantipyrine and characterized by IR, 1H NMR, 13C NMR spectra and CHNO analysis, as simple, selective and reliable analytical reagent for the determination of Pd(II) and Ag(I) ions spectrophotometrically. The reagent reacts with ions at pH 4 for Pd(II) and 8 for Ag(I) and formed colored complexes 1:1 stoichiometry of Pd(II) and Ag(I), which show a maximum absorbance of 518 and 492 nm of molar ratio absorbitivity 5.331 x 103 and 1.025 x 104 L.mol-1 cm-1, respectively. Fixed optimum conditions were constructed, precision, accuracy, R. S. D. and effect of solvents. The beers law was obeyed 0.1-3 mg/L. The reagent was used for enhance the properties of nano silver by ligand exchange reaction on nanoparticles.