Abstract
The electrochemistry of (TPP)Co in presence of pyridine was investigated in dichloroethane solution by cyclic voltammetry. Upon the addition of pyridine to the solution, two reduction peaks of Co(Ⅲ)/Co(Ⅱ) at 0.25 and -0.40 V (SCE) were observed. It was infered that the peaks were belong to the reductions of the complex compounds with one and two axial pyridine, (TPP)Co(Ⅲ)(Py) and (TPP)Co(Ⅲ)(Py)2. Even though the mole ratio of added pyridine was less than 1 the reduction of Co(Ⅲ)/Co(Ⅱ) still mainly occured at -0.40 V, which evidently resulted from pyridine adsorption on the electrodes. Besides, it was observed that the reduction peak of Co(Ⅱ)/Co(Ⅰ) was shifted to -1.20 V (SCE) with large amount of added pyridine. The new reduction peak could be attributed to the direct reduction of the axially coordination complex (TPP)Co(Ⅱ)(Py). The mechanisms of the effect of pyridine on the electrochemical redox behaviours of (TPP)Co were given.
Publication Date
1997-11-28
Online Available Date
1997-11-28
Revised Date
1997-11-28
Received Date
1997-11-28
Recommended Citation
Chuanwei Yan, Xiangqui Lin, Haichao Lin, Chunan Cao.
Cyclic Voltammetric Investigation of the Axial Coordination Effects of Pyridine on the Redox Behaviours of (TPP)Co[J]. Journal of Electrochemistry,
1997
,
3(4): Article 9.
DOI: 10.61558/2993-074X.2661
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol3/iss4/9
