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576379

Sigma-Aldrich

Polyaniline (emeraldine base)

average Mw ~100,000

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Synonym(s):
Emeraldine base polyaniline
CAS Number:
MDL number:
NACRES:
NA.23

mol wt

average Mw ~100,000

Quality Level

conductivity

1 × 10-9 S/cm (pressed pellet, ASTM F8)

solubility

m-cresol: soluble
DMAC: soluble
DMF: soluble
DMSO: soluble
NMP: soluble

λmax

324 nm

InChI

1S/C3H4BrN3.ClH/c1-2-3(4)6-7-5-2;/h1H3,(H,5,6,7);1H

InChI key

LYCWKZFKTMHXQA-UHFFFAOYSA-N

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1 of 4

This Item
530689556386556459
conductivity

1 × 10-9 S/cm (pressed pellet, ASTM F8)

conductivity

-

conductivity

-

conductivity

-

solubility

m-cresol: soluble

solubility

m-cresol: soluble, DMAC: soluble, DMF: soluble, DMSO: soluble, NMP: soluble

solubility

m-cresol: soluble, DMAC: soluble, DMF: soluble, DMSO: soluble, NMP: soluble

solubility

m-cresol: soluble, DMAC: soluble, DMF: soluble, DMSO: soluble, NMP: soluble

λmax

324 nm

λmax

331 nm

λmax

~330 nm

λmax

~325 nm

Quality Level

100

Quality Level

100

Quality Level

100

Quality Level

100

General description

Polyaniline (PAni) emeraldine salt can be prepared by protonation of PAni emeraldine base (PAni-EB). PAni-EB forms at pH>7. Its mechanism against corrosive agents has been explained in a study.
Polyaniline (emeraldine base) (PANI-EB) is an intrinsically conducting polymer (ICP) that can be formed by oxidative polymerization of aniline. Emeraldine base contains oxidized diimine and reduced diamine. PANI can be modified into the conjugating emeraldine base form by p-type doping with protonic acid.

Application

PANI-EB can form a nanocomposite with multi-walled carbon nanotubes (MWCNTs) that can be used to functionalize glassy carbon electrodes for the electro-sensitive detection of cadmium (Cd(II)) and lead (Pb(II)). Carbon nanofibers may be reinforced on PANI-EB to yield a specific capacitance of 95 F/g and a 92% retention over 3000 cycles as observed in supercapacitor applications. It may be used with heptamethyleneimine as an inhibitor to form stable fuel cell membranes.

Features and Benefits

Undoped form of conducting polymer (non-conductive).

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Sensitive stripping voltammetric determination of Cd (II) and Pb (II) by a Bi/multi-walled carbon nanotube-emeraldine base polyaniline-Nafion composite modified glassy carbon electrode
Zhao G, et al.
Electrochimica Acta, 220, 267-275 (2016)
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Polyanilines: a novel class of conducting polymers
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