The visible absorption spectra of some pyridone based disperse azo dyes have been studied as function of pH values and solvents. The relationship between the hydrazone azo anion equilibrium and the pH value of dye sol...The visible absorption spectra of some pyridone based disperse azo dyes have been studied as function of pH values and solvents. The relationship between the hydrazone azo anion equilibrium and the pH value of dye solution is discussed. The pyridone based disperse dyes readily undergo acid dissociation to give the anion form at higher pH values or in ethanol, DMF and DMSO.展开更多
文摘The visible absorption spectra of some pyridone based disperse azo dyes have been studied as function of pH values and solvents. The relationship between the hydrazone azo anion equilibrium and the pH value of dye solution is discussed. The pyridone based disperse dyes readily undergo acid dissociation to give the anion form at higher pH values or in ethanol, DMF and DMSO.
