Synthesis and Properties of Amorphous Hole Transport Materials of Triphenylamine Based Trihydrazones

A novel class of amorphous state triphenylamine-based trihydrazones were synthesized by condensation reaction of tris(pformylphenyl)amine with N-methyl-N-phenyl hydrazine, N,N-diphenylhydrazine, N-1-naphthyl-N-phenyl-hydrazine, and N-2naphthyl-N-phenyl-hydrazine, respectively, and characterized using different scanning calorimetry (DSC) and cyclic voltammetry (CV).