New N-triaryl-substituted polyamides materials as light Emitters for semiconductors applications

Abstract

     In this work, new di-acid monomers 4, 4’-di-carboxillic-2â€-chloro-4â€- nitro triphenylamine (Di-CO2H-1), 4, 4’- di-carboxylic -2â€,4â€,6â€-trichloro-triphenylamine (Di-CO2H-2) were synthesized by reaction of p-cyanobenzofluride with two aromatic amines (2-chloro 4-nitro aniline and 2,4,6-trichloro aniline by aromatic nucleophilc substitution method to produce two di cyano intermediates compounds 4, 4’-Dicyano-2â€-chloro-4â€- nitro triphenylamine (Di-CN1) and 4, 4’-dicyano-2â€,4â€,6â€-trichloro-triphenylamine (Di-CN2) which form final di-carboxylic monomers after alkaline hydrolysis. Finally, these monomers react with two different aromatic di amines, phenylene diamins and benzidine respectively via polycondensation reaction to form final polyamides 2â€-chloro-4â€- nitro -triphenylamine-4, 4'-polyphenylbenzamide (Pa), 2â€,4â€,6â€-trichloro-triphenylamine -4,4'-polyphenylbenzamide (Pb), 2â€-chloro-4â€- nitro triphenylamine-4,4'- polyphenylbiphenylamide (Pc), 2â€,4â€, 6â€-trichloro-triphenylamine-4,4’- polyphenylbiphenylamide (Pd).

The chemical structure of these polymers characterized by FTIR and NMR techniques. The polyamides showed a good thermal stability with height glass transition temperatures (Tg).

Thin casting films of these polyamides in cyclic voltammetry (C.V) on glass substrate of iridium-tin oxide (ITO) as working electrode in dry CH₃CN solvent contains 0.1 M of tetrabutylantimoneperchlorate (TBAP) as an electrolyte gave one redox wave.