The Azo-Hydrazone Tautomerism of Azo Dyes(II)

A review concerning the azo-hydrazone tautomerism of azo dyes was presented with 108 references. It contains three parts:( 1) Assessmental methods of azo or hydrazone form;( 2) Effects of Structure and environmental factors on azo/hydrazone equilibrium;( 3) Relationships between the dye structures and their performances.