ELECTROPOLYMERIZATION OF ANILINE AND PYRROLE IN THE PRESENCE OF COPPER(II)
Polymerization of aniline and pyrrole in the presence of copper(II) coming from different salts were studied by cyclic voltammetry. The systems used are: polymer/CuCl2/HCl, polymer/CuSO4/H2SO4 and polymer/Cu(NO3)2/HNO3 ). The polymer/metal mol ratios were 10/1 in both cases. The voltammograms were recorded at pH = 0 under constant potentiodynamic regime of 100 mV. s-1. It was found that aniline polymerizes in presence of Cu(II) and of all the strong acids tested (HCl, H2SO4 and HNO3). The best medium to obtain polyaniline was Cu(II) in 1 M HCI. Both polyaniline and poly(pyrrole) showed a better voltammetric behavior in HCl medium. It was attributed to the CuCl2- or CuCl3(2-) complex formation which can be incorporated to the polymer when it is electro-oxidized. It was not possible polymerize pyrrole in H2SO4.
| Main Authors: | , , , , |
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| Format: | Digital revista |
| Language: | English |
| Published: |
Sociedad Chilena de Química
2001
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| Online Access: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0366-16442001000200017 |
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