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Synthesis of a polypyrrole film on a non-conducting substrate : the influence of the acid concentration on the Fe3+ equilibria

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Author: Schoor, R.C.G.M. van den · Leur, R.H.M. van de · Wit, J.H.W. de
Type:article
Date:1999
Publisher: Elsevier Sequoia SA
Place: Lausanne, Switzerland
Institution: TNO Industrie
Source:Synthetic Metals, 1-3, 102, 1404-1405
Identifier: 235052
doi: doi:10.1016/S0379-6779(98)01473-8
Keywords: Materials · Acids · Calculations · Iron compounds · pH · Polymerization · Polypyrroles · Substrates · Ultraviolet spectroscopy · Nonconducting substrate · pH measurement · Polypyrrole film · Conductive films

Abstract

The synthesis of a polypyrrole film on a non-conducting substrate is studied. A thin film of conducting polypyrrole is deposited on a non-conducting substrate by dipping the substrate in a pyrrole solution and subsequently in an oxidising solution containing Fe(ClO4)3 and HClO4. The influence of the acid concentration on the Fe3+ equilibria is calculated. The results of these calculations are in agreement with UV/VIS and pH measurements. The calculations show that for HClO4 concentrations of 0.50 M and higher the influence on the Fe3+ equilibria is negligible.