Chemical Synthesis Of Chiral Conducting Polymers

A process of forming a chiral conducting polymer, e.g., polyaniline.

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Chemical Synthesis Of Chiral Conducting Polymers

A process of forming a chiral conducting polymer, e.g., polyaniline, is provided including reacting a monomer, e.g., an aniline monomer, in the presence of a chiral dopant acid to produce a first reaction mixture by addition of a solution including a first portion of an oxidizing agent, the first portion of oxidizing agent characterized as insufficient to allow complete reaction of the monomer, and further reacting the first reaction mixture in the presence of the chiral dopant acid by addition of a solution including a second portion of the oxidizing agent, the second portion of oxidizing agent characterized as insufficient to allow complete reaction of the monomer, and repeating the reaction by addition of further portions of the oxidizing agent until the monomer reaction is complete to produce a chiral conducting polymer, e.g., polyaniline. A preferred process includes addition of a catalyst during the reaction, the catalyst selected from among the group consisting of phenylene diamine, aniline oligomers and amino-capped aniline oligomers and metal salts. The processes of the present invention further provide a resultant polyaniline product having a chirality level defined by a molar ellipticity of from about 40.times.10.sup.3 degree-cm.sup.2/decimole to about 700.times.10.sup.3 degree-cm.sup.2/decimole. The processes of the present invention further provide a resultant polyaniline product having a nanofiber structure with a diameter of from about 30 nanometers to about 120 nanometers and from about 1 micron to about 5 microns in length.

U.S. Patent No.: 7,074,887 (DOE S-97,861), Patent Application Filing Date: December 17, 2002, Patent Issue Date: July 11, 2006

U.S. Patent No.: 7,476,765 (DOE S-109,107 This case is a Divisional of U.S. Patent No. 7,047,887), Patent Application Filing Date: July 11, 2006, Patent Issue Date: January 13, 2009

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