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Citation: Yan Chuanwei, Wang Zhenxin, Lin Xiangqin. Electrochemical and Spectroelectrochemical Studies on Oxidation Reactions of(TPP)Ni(Ⅱ)[J]. Chinese Journal of Applied Chemistry, ;1996, 13(6): 55-57. shu

Electrochemical and Spectroelectrochemical Studies on Oxidation Reactions of(TPP)Ni(Ⅱ)

1.
Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chmistry of the Chinese Academy of Sciences, National Analytical Research Center of Electrochemistry and Spectroscopy, Changchun 130022

Received Date: 26 February 1996
Available Online: 27 June 1996

The oxidation reactions of(TPP)Ni(Ⅱ) were reinvestigated by cyclic voltammetry and spectroelectrochemistry in the presence of F^- anions in methylene chloride solution.It was found that the addition of F^-led to the appearance of Ni(Ⅱ)/Ni(Ⅲ) redox step at E_1/2=0.60 V(vs.SCE),which were followed by two one-electron oxidation reactions of the porphyrin ring at E_1/2=0.95V and 1.25 V,respectively.In-situ thin-layer spectra were obtained and assigned to these ring oxidized Ni(Ⅲ) species.An intermediate spectrum of (TPP)Ni(Ⅲ) was observed in a time-resolved thin-layer electrolysis.A box mechanism of F^- coordination-redox reactions was proposed for this system.
- nickel porphyrin,
- anion coordination,
- electrochemistry,
- spectroelectrochemistry
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