Abstract
Novel functionalized conductive polymers are synthesised using modification reactions of polyaniline: diazonium coupling, nucleophilic addition and N-nitrosation. Diazonium salt coupling with polyaniline renders modified polymers which are soluble in common solvents and electroactive. Nucleophilic addition could also be used to modify polyaniline. Modified polymers produced by addition of thiols, carbanions and arylsulphinic acids are described. The nucleophilic addition of arylsulphinic acids to oxidized polyaniline is shown to be controlled by the oxidation and/or protonation state of the polymer. It is also possible to N-nitrosate polyaniline producing a material soluble in common solvents. The reaction could be reversed by acid treatment. The reversible nitrosation reaction is used to design lithographic and photolithographic processes to deposit PANI patterns.
Highlights
Polymers have been traditionally considered as insulators.[1]
PANI was suspended in TRIS® buffer and mixed with the diazonium salt solution in an ice bath
The coupling of diazonium salts with PANI was investigated by Liu and Friend.[12]
Summary
Polymers have been traditionally considered as insulators.[1]. since the discovery by Shirakawa, Heeger and MacDiarmid that the conductivity of polyacetylene increases significantly upon doping with electron acceptors,[2] a large effort has been devoted to make new intrinsically conductive polymers (ICP) and/or improving the properties of those materials.[3].
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