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Sigma-Aldrich

Polyaniline (emeraldine base)

average Mw ~65,000

Synonym(s):

Emeraldine base polyaniline

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About This Item

CAS Number:
25233-30-1
MDL number:
MFCD00241446
UNSPSC Code:
12352103
PubChem Substance ID:
24877768
NACRES:
NA.23

mol wt

average Mw ~65,000

mp

>350 °C

solubility

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

λmax

331 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) is a conductive polymer which consists of a ring structure attached with nitrogen substituted derivatives. It has an emeraldine type oxidation state that exists in the form of its base. It can be prepared by deprotonation of emeraldine hydrochloric acid and ammonium hydroxide. It is mainly used in the development of electrochemical devices.

Application

PANI forms a conjugating polymeric system that can be used for a variety of semiconducting applications. It can be used in the fabrication of a variety of devices which include fuel cells, light emitting diodes supercapacitors, chemical sensors and rechargeable batteries.
PAni-EB/Polyacrylonitrile (PAN) composite nanofibers were fabricated. The effect of the concentration of dopant and solvent on the morphology, conductivity and mechanical properties of the composites were studied. Preparation of PAni-EB/PAN nanoweb has also been reported.

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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Application of polyaniline (emeraldine base, EB) in polymer light-emitting devices.
Wang HL, et al.
Synthetic Metals, 78(1), 33-37 (1996)
Supercapacitors based on flexible graphene/polyaniline nanofiber composite films
Wu Q, et al.
ACS Nano, 4(4), 1963-1970 (2010)
Polyaniline nanofibers: facile synthesis and chemical sensors
Huang J, et al.
Journal of the American Chemical Society, 125(2), 314-315 (2003)
Polyanilines: a novel class of conducting polymers.
MacDiarmid AG and Epstein AJ
Faraday Discussions of the Chemical Society, 88(1-3), 317-332 (1989)
Polyaniline: allowed oxidation states.
Masters JG, et al.
Synthetic Metals, 41(1-2), 715-718 (1991)
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