Novel Multifunctional Polymers from Aromatic Diamines by Oxidative Polymerizations

Abstract

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Spectroelectrochemical study of the oxidation of diaminophenols on platinum electrodes in acidic medium

“…The chemical and electrochemical oxidation of phenylenediamines has been extensively researched [35]. Chemical oxidation of p-phenylenediamines (p-PD) and N-substituted derivatives has been extensively explored due to its application in hair coloring and color photography [36][37][38][39][40].…”

“…The electrochemical oxidation of p-PD in aqueous acidic medium produces p-benzoquinone as final product [38,40]. However, it has been reported that p-PD produces a polymeric powder by chemical oxidative polimerization [35,41]. The electro-oxidation of both m-phenylenediamine (m-PD) and o-phenylenediamine (o-PD) produces polymeric films [35].…”

“…However, it has been reported that p-PD produces a polymeric powder by chemical oxidative polimerization [35,41]. The electro-oxidation of both m-phenylenediamine (m-PD) and o-phenylenediamine (o-PD) produces polymeric films [35]. m-Phenylenediamine polymers could present two structures including rigid rod-like ladder or network type, depending on the coupling orientation in the m-PD monomer [35,42] [43][44][45] to form an electroactive film.…”

“…The electro-oxidation of both m-phenylenediamine (m-PD) and o-phenylenediamine (o-PD) produces polymeric films [35]. m-Phenylenediamine polymers could present two structures including rigid rod-like ladder or network type, depending on the coupling orientation in the m-PD monomer [35,42] [43][44][45] to form an electroactive film. The poly(o-phenylenediamine (Po-PD) is a ladder polymer [46] with structure and properties closely related to those of poly(o-aminophenol) [9,12].…”

ELECTRICAL CONDUCTIVITIES OF SYNTHESIZED POLY o- PHENYLENEDIAMINE AND ITS NANOCOMPOSITES.

“…The peak at 1359 cm -1 and 1286 cm -1 are associated with C-N-C stretching in the benzenoid and quinoid rings 22 . Furthermore, the bands at 718 cm -1 and 609 cm -1 are the characteristic of C-H out-of-plane bending vibrations of benzene nuclei in the phenazine skeleton 23 . However with addition of SiO 2 nanoparticles, the characteristic peaks are slightly shifted to the lower wave numbers with slight increase in their intensities.…”