Electrochemical reduction of N-(1-butyl)pyridinium cation in 1-methyl-3-ethylimidazolium chloride—aluminium chloride ambient temperature ionic liquids
✍ Scribed by M. Lipsztajn; R.A. Osteryoung
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 391 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
The reduction of N-(I-butyl)pyridinium cation (BuPy+) has been studied in the ambient temperature ionic liquid, 1-methyl-3-ethyhmidazolium chloride (ImClj-ahtminium chloride. A one-electron wave with convectivediffusion controlled limiting current was observed and the diffusion coeiiicients of BuPy + were measured in neutral and basic (MC = 0.6) ImCl-AlCI, melts. The Dq/L"product was found to be almost independent of melt composition. E1,2 and peak potentials measured in neutral and basic melts were practically independent of melt composition; however a small but significant shift to less negative potentials was observed in the absence of chloride ions (ie in pure ImAlC1,). This effect was attributed to ion pair formation (BuPy+Cl-).
Coulometry indicated an "n" value of 1 for the reduction of the BuPy+ cation. About 15 % of the primary product was transformed into the electroactive viologens.