Compositions – Electrically conductive or emissive compositions
Patent
1988-02-12
1990-05-29
Barr, Josephine
Compositions
Electrically conductive or emissive compositions
252518, 526256, 526258, 524408, 524422, 524404, 524167, 524401, 524415, 528490, 528 38, H01B 100
Patent
active
049293893
ABSTRACT:
Polymers which are soluble in water and are electrically conductive. The monomer repeat unit is a thiophene or pyrrole molecule having an alkyl group substituted for the hydrogen atom located in the beta position of the thiophene or pyrrole ring and having a surfactant molecule at the end of the alkyl chain. Polymers of this class having 8 or more carbon atoms in the alkyl chain exhibit liquid crystalline behavior, resulting in high electrical anisotropy. The monomer-to-monomer bonds are located between the carbon atoms which are adjacent to the sulfur or nitrogen atoms. The number of carbon atoms in the alkyl group may vary from 1 to 20 carbon atoms. The surfactant molecule consists of a sulfonate group, or a sulfate group, or a carboxylate group, and hydrogen or an alkali metal. Negative ions from a supporting electrolyte which may be used in the electrochemical synthesis of a polymer may be incorporated into the polymer during the synthesis and serve as a dopant to increase the conductivity.
REFERENCES:
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A. O. Patil et al., "Water-Soluble Conducting Polymers," J. Am. Chem. Soc. 09, 1858 (Mar. / 18, 1987).
K. Tamao et al., "Nickel-Phosphonine Complex-Catalyzed Grignard Coupling-II: Grignard Coupling of Heterocyclic Compounds," Tetrahedron 38 (22), 3347-3354 (1982).
A. F. Diaz et al., "Electrochemical Polymerization of Pyrrole," J.C.S. Chem. Comm. 635.gtoreq.636 (1979).
K. Keiji Kanzawa et al., "`Organic Metals`: Polypyrrole, A Stable Synthetic `Metallic` Polymer." J.C. S. Chem. Comm., 854-855 (1979).
Kwan-Yue et al., "Highly Conducting, Soluble, Environmetnally-Stable Poly(3-alkyl-thiophenes), " J. Chem. Soc., Chem. Commun., 1346 (1986).
Barr Josephine
Cordovano Richard J.
Gaetjens Paul D.
Hightower Judson R.
The United States of America as represented by the Department of
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