Polyaniline nanostructures and the role of aniline oligomers in their formation

0349446 - ÚMCH 2011 RIV NL eng J - Journal Article
Stejskal, Jaroslav - Sapurina, I. - Trchová, Miroslava
Polyaniline nanostructures and the role of aniline oligomers in their formation.
Progress in Polymer Science. Roč. 35, č. 12 (2010), s. 1420-1481. ISSN 0079-6700. E-ISSN 1873-1619
R&D Projects: GA MŠMT ME 847; GA AV ČR IAA400500905; GA AV ČR IAA100500902; GA ČR GA203/08/0686; GA ČR GA202/09/1626
Institutional research plan: CEZ:AV0Z40500505
Keywords : conducting polymer * nanofibers * nanotubes
Subject RIV: CD - Macromolecular Chemistry
Impact factor: 22.870, year: 2010

Polyaniline (PANI) is prepared by the oxidation of aniline. Depending on the acidity conditions during the chemical oxidation, different types of products can be identified. The aniline dimers, semidines, are the first oxidation products. In the next step, aniline trimers containing a phenazine moiety, the nucleates, are produced. At moderate acidity, pH> 3.5, the reaction pathway further leads to higher brown non-conducting aniline oligomers. Alternatively, when the acidity is sufficiently high, pH< 2.5, the nucleates convert to initiation centers that start the subsequent propagation of PANI chains. The formation of various polyaniline morphologies, viz. nanotubes, nanofibers, thin films, and colloidal particles, is reviewed and related to chemistry of aniline oxidation.
Permanent Link: http://hdl.handle.net/11104/0006096