Sammanfattning
Electrosynthesis of polypyrrole (PPy) was studied in aqueous lithium iodide solution. The electrochemical polymerization showed features of two-dimensional growth and the reaction was catalyzed by the I-2/I- couple. The potentiometric response of PPy doped with iodide (PPy(I)) was studied both in iodide solutions and solutions containing the redox couple I-2/I- with a fixed concentration ratio 0.4 but varying the initial concentration of iodide in the range 10(-5)-1.0 M. Linear, anionic response was observed in the concentration range 10(-1)-10(-3) M when only iodide species was present. However, contribution of the redox response to the overall potentiometric response increased with increasing concentration of I-2 although the concentration ration between iodine/iodide was kept constant. The influence of phosphate buffer on the electroactivity of PPy doped with iodide was also studied.
| Originalspråk | Odefinierat/okänt |
|---|---|
| Sidor (från-till) | 217–225 |
| Antal sidor | 9 |
| Tidskrift | Analytica Chimica Acta |
| Volym | 355 |
| Nummer | 2-3 |
| DOI | |
| Status | Publicerad - 1997 |
| MoE-publikationstyp | A1 Tidskriftsartikel-refererad |
Nyckelord
- iodide
- iodine
- phosphate buffer
- polypyrrole
- potentiometry
- two-dimensional growth