Simple synthesis of water-soluble conducting polyaniline

Shoji Ito; Kazuhiko Murata; Seiichi Teshima; Ryuji Aizawa; Yoshinobu Asako; Kohshin Takahashi; Brian M Hoffman

Simple synthesis of water-soluble conducting polyaniline

Shoji Ito, Kazuhiko Murata^*, Seiichi Teshima, Ryuji Aizawa, Yoshinobu Asako, Kohshin Takahashi, Brian M Hoffman

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

102 Scopus citations

Abstract

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^-, SO₄^2-, 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.

Original language	English (US)
Pages (from-to)	161-163
Number of pages	3
Journal	Synthetic Metals
Volume	96
Issue number	2
State	Published - Jul 30 1998

Keywords

Polyaniline
Synthesis

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Cite this

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title = "Simple synthesis of water-soluble conducting polyaniline",

abstract = "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.",

keywords = "Polyaniline, Synthesis",

author = "Shoji Ito and Kazuhiko Murata and Seiichi Teshima and Ryuji Aizawa and Yoshinobu Asako and Kohshin Takahashi and Hoffman, {Brian M}",

year = "1998",

month = jul,

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language = "English (US)",

volume = "96",

pages = "161--163",

journal = "Synthetic Metals",

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T1 - Simple synthesis of water-soluble conducting polyaniline

AU - Ito, Shoji

AU - Murata, Kazuhiko

AU - Teshima, Seiichi

AU - Aizawa, Ryuji

AU - Asako, Yoshinobu

AU - Takahashi, Kohshin

AU - Hoffman, Brian M

PY - 1998/7/30

Y1 - 1998/7/30

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.

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.

KW - Polyaniline

KW - Synthesis

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M3 - Article

AN - SCOPUS:0032108386

SN - 0379-6779

VL - 96

SP - 161

EP - 163

JO - Synthetic Metals

JF - Synthetic Metals

IS - 2

ER -

Simple synthesis of water-soluble conducting polyaniline

Abstract

Keywords

ASJC Scopus subject areas

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