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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:
UNSPSC Code:
12352103
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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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).

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

JAN Code

576379-VAR:
576379-BULK:
576379-5G:
576379-25G:


Certificates of Analysis (COA)

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Polyanilines: a novel class of conducting polymers
MacDiarmid AG and Epstein AJ
Faraday Discussions of the Chemical Society, 88, 317-332 (1989)
Engineering conformal nanoporous polyaniline via oxidative chemical vapor deposition and its potential application in supercapacitors
Li X, et al.
Chemical Engineering Science, 220, 267-275 (2018)
Synthesis and characterization of polyaniline membranes with-secondary amine additive containing N, N?-dimethyl propylene urea for fuel cell application
Kumar A, et al.
International Journal of Hydrogen Energy, 220, 267-275 (2018)
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)
Study of epoxy and alkyd coatings modified with emeraldine base form of polyaniline.
Armelin E, et al.
Progress in Organic Coatings, 58, 316-322 (2007)

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