| Full text | |
| Author(s): |
Fernandez, R. A.
;
Benedetti, T. M.
;
Torresi, R. M.
Total Authors: 3
|
| Document type: | Journal article |
| Source: | JOURNAL OF ELECTROANALYTICAL CHEMISTRY; v. 737, p. 7-pg., 2015-01-15. |
| Abstract | |
Polypyrrole (Ppy) thin films were obtained by pyrrole (py) electropolymerization in ionic liquid (IL) media. The charge compensation dynamics as well as the electrochromic behavior of the obtained films were studied in two ILs with similar structures, being one containing -CH3 (aprotic IL) and the other containing -H (protic IL) attached to the ethylimidazolium cation. The results obtained with quartz crystal microbalance with dissipation combined with cyclic voltammetry have shown that in spite of the presence of protons in the PIL, which could favor both electropolymerization and electrochemistry of Ppy in this media, these processes are more effective in the aprotic IL, leading us to conclude that other factors must be take into account when choosing the most appropriated IL as electrolyte. Also, electrochemical reactions in both ILs were successfully associated to the transformation of chromogenic species by evaluating the electrochromic activity of the polymeric films. (C) 2014 Elsevier B.V. All rights reserved. (AU) | |
| FAPESP's process: | 11/20711-3 - Electrochemistry of modified electrodes in protic ionic liquids |
| Grantee: | Ricardo Ariel Fernández |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 09/53199-3 - Molecular recognition and energy storage: fundamental studies concerning geometry, size and synthesis effects on the optimization of the chemical properties of electroactive materials |
| Grantee: | Roberto Manuel Torresi |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 12/02117-0 - Poly(ionic liquids) in electrochemical devices: polyelectrolytes for energy storage and conversion devices and stabilization of graphene and poly(3,4-etylenedioxidethiophene) (PEDOT) for electroactive films obtention |
| Grantee: | Tania Machado Benedetti |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |