Synthesis and characterization of conducting polyaniline …

SYNTHESIS,STRUCTURE, PROPERTIES AND APPLICATIONS OF CONDUCTING POLYANILINE[J].

Synthesis and Properties of Conducting Polyaniline …

N2 - A water-soluble externally (HCl)-doped conducting polyaniline (ED-SPAN) is prepared by such a simple synthetic method that emeraldine salts are sulfonated by chlorosulfonic acid in dichloroethane at 80°C and subsequently hydrated in water at 100°C. Sulfonating any emeraldine salts (counter anion X- = Cl-, SO42-, and BF4-) or emeraldine base results in the production of HCl-doped sulfonated polyaniline, where HCl dopant from hydrolysis of chlorosulfonic group exchanges with the original dopant. The degree of sulfonation, namely, sulfur-to-nitrogen (S/N) ratio, can be controlled by adjusting the amount of chlorosulfonic acid. With increasing S/N ratio from 0.65 to 1.3, the solubility in neutral water increases from 22 to 88 g/I and the four-probe conductivity for a compressed pellet decreases from 0.023 to 1.7 × 10-5 S/cm, showing sulfonation-induced undoping.

Novel synthesis of the conducting polymer, polyaniline, …

AB - A water-soluble externally (HCl)-doped conducting polyaniline (ED-SPAN) is prepared by such a simple synthetic method that emeraldine salts are sulfonated by chlorosulfonic acid in dichloroethane at 80°C and subsequently hydrated in water at 100°C. Sulfonating any emeraldine salts (counter anion X- = Cl-, SO42-, and BF4-) or emeraldine base results in the production of HCl-doped sulfonated polyaniline, where HCl dopant from hydrolysis of chlorosulfonic group exchanges with the original dopant. The degree of sulfonation, namely, sulfur-to-nitrogen (S/N) ratio, can be controlled by adjusting the amount of chlorosulfonic acid. With increasing S/N ratio from 0.65 to 1.3, the solubility in neutral water increases from 22 to 88 g/I and the four-probe conductivity for a compressed pellet decreases from 0.023 to 1.7 × 10-5 S/cm, showing sulfonation-induced undoping.

A water-soluble externally (HCl)-doped conducting polyaniline (ED-SPAN) is prepared by such a simple synthetic method that emeraldine salts are sulfonated by chlorosulfonic acid in dichloroethane at 80°C and subsequently hydrated in water at 100°C. Sulfonating any emeraldine salts (counter anion X- = Cl-, SO42-, and BF4-) or emeraldine base results in the production of HCl-doped sulfonated polyaniline, where HCl dopant from hydrolysis of chlorosulfonic group exchanges with the original dopant. The degree of sulfonation, namely, sulfur-to-nitrogen (S/N) ratio, can be controlled by adjusting the amount of chlorosulfonic acid. With increasing S/N ratio from 0.65 to 1.3, the solubility in neutral water increases from 22 to 88 g/I and the four-probe conductivity for a compressed pellet decreases from 0.023 to 1.7 × 10-5 S/cm, showing sulfonation-induced undoping.


Chemical and Biological Engineering

AB - II-VI group of semiconductor cadmium sulphide (CdS) nanocrystalline, which were coated with conducting polyaniline (PANI), have been prepared by microemulsion processing technique. The synthesized polyaniline-coated CdS nanocomposites were characterized by UV-Vis absorption spectroscopy, energy filter transmission electron microscopy (EFTEM), FTIR spectroscopy and TGA analysis. The UV-Vis spectrums revealed the enhancement of doping level for the nanocomposites, which is assigned to the existence of greater number of charges on the polymer backbone. The FTIR spectra indicated that the polymers were highly doped and existed in conducting emeraldine salt form. The as-prepared PANI/CdS nanocomposites were polydispersed and have an average size of ca. 17.8 nm. The obtained CdS/PANI nanocomposites showed significant improvement in the thermal behavior as indicated in the TGA thermograph.

PDF Downloads : Oriental Journal of Chemistry

Amongst the family of conducting polymers and organic semiconductors, polyaniline is unique due to its ease of synthesis, environmental stability, and simple doping/dedoping chemistry.

International Journal « Nanoelectronics lab

(2008).Conducting polyaniline 5-sulfosalicylate nanotubes and nanorods weresynthesized by the template-free oxidative polymerization of aniline inaqueous solution of 5-sulfosalicylic acid, using ammoniumperoxydisulfate as an oxidant.

Synthesis and characterization of conducting ..

Laccase shows remarkable advantages in the synthesis of conducting polyaniline compared to the commonly used horseradish peroxidase due to its high activity and stability under acidic conditions.