New Hydrazyl Derivatives with Multiple Properties

4-(N',N'-diphenylhydrazino)-3,5-dinitrobenzoic acid in reaction with 4-hydroxy-tempo, 4-aminobenzo-15-crown-5, and 1-bromoacetyl-pyrene, yielded the corresponding esters or amides, as yellow compounds. These hydrazines, by oxidation with lead dioxide, converted into the stable hydrazyl free radicals, with a purple-violet color. Same yellow hydrazines in reaction with alkali bases are converted into the corresponding salt of green color. The newly synthesized compounds were characterized by elemental analysis, IR, UV-Vis, H-1- and C-13-NMR, and EPR (where applicable). Acid-base, redox, fluorescence and complexation properties were also studied and discussed.