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Sigma-Aldrich

Polyaniline (emeraldine base)

average Mw ~100,000

Synonym(s):

Emeraldine base polyaniline

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About This Item

CAS Number:
25233-30-1
MDL number:
MFCD00241446
UNSPSC Code:
12352103
NACRES:
NA.23

mol wt

average Mw ~100,000

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).

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

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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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)
Polyanilines: a novel class of conducting polymers
MacDiarmid AG and Epstein AJ
Faraday Discussions of the Chemical Society, 88, 317-332 (1989)
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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