Mechanochemical synthesis and characterization of poly(2,5‐dimethoxy aniline) salts

Abstract

ABSTRACT:The interfacial interaction and orientation of molecules during the polymerization process plays a vital role in the enhancement of the surface properties of conducting polymers. In this perspective, a solid-phase mechanochemical route is employed to prepare poly(2,5-dimethoxy aniline) (PDMA) and its salts with superior properties. Various studies performed on the as-prepared polymer highlights the formation of polymeric particles with excellent physicochemical properties. Elemental analysis showed the presence of dopants anion in the polymeric backbone. Spectroscopic profile of PDMAs revealed the formation of emeraldine form of PDMAs. Moreover, these studies indicate the formation of PDMA-HCl in a highly doped state. The surface morphological pictures of PDMAs revealed the formation of aggregated microstructured to nanostructured particulates. X-ray diffraction, cyclic voltammetry were used to evaluate the physicochemical properties of PDMAs. PDMA salts exhibited crystalline behavior and good electrochemical activity. TG/ DTA analysis showed that all the PDMAs were thermally stable up to 240 C.

Synthesis of Poly (2,5-dimethoxyaniline) and Electrochromic Properties

“…This can be explained by the effect of the doping acid size; i.e. if the doping acid size is large, the diffusion of doping acid into the polymer matrix will be hindered 48 . On increasing the potential from 1.0 to 1.6 V, the response times of the PDMA films in both acid electrolytes decrease due to the increase of the conductivity upon increasing the applied potential 49 .…”

Effect of electrolytes on electrochromic properties and morphology of poly(2,5-dimethoxy aniline) films

“…The results of the response time of PDMA from various acids indicate that the increase in the polymerization time contributes to the increase in the thickness of the PDMA films and a more compact structure, resulting in slower response time. Moreover, the HCl-PDMA film shows the fastest response time (3⋅7 s) relative to other acids at the same synthesis time, because it produces the thinnest film and the smallest doping acid size resulting in a faster doping process (Palaniappan et al 2012). Furthermore, it is found that the 3⋅7 s response time of the HCl-PDMA is faster than the ITO/PDMA||LiClO 4 -PC-PEO (400,000)|| WO 3 /ITO device (Huang et al 2002), since liquid electrolyte has greater ion mobility than gel electrolyte.…”

Solvent‐free Synthesis, Characterization and Solvent‐Vapor Interaction of Zinc(II) and Copper(II) Coordination Polymers containing Nitrogen‐donor Ligands

“…Mechanochemical synthesis (grinding in a mortar with a pestle or ball‐milling) presents viable green routes for the preparation of novel molecular and supramolecular solids . This novel way of synthesis leads directly to products in powder form.…”