Theory of Voltammetry at Constant Current. IV. Electron Transfer Followed by Chemical Reaction

1954 ◽  
Vol 76 (21) ◽  
pp. 5319-5324 ◽  
Author(s):  
Paul Delahay ◽  
Calvin C. Mattax ◽  
Talivaldis Berzins
Keyword(s):  
Electron Transfer ◽  
Chemical Reaction ◽  
Constant Current

scholarly journals Photoredox Reaction of trans-4-Stilbenecarboxylatopentaamminecobalt(III)

1979 ◽  
Vol 34 (2) ◽  
pp. 271-274 ◽  
Author(s):  
Arnd Vogler ◽  
Alfred Kern
Keyword(s):  
Electron Transfer ◽  
Chemical Reaction ◽  
Oxidation Product ◽  
Redox Reaction ◽  
Excited Singlet ◽  
Low Complex

AbstractThe irradiation (λ = 313 nm) of aqueous [Co(III)(NH3)5TSC]2+(TSC-= trans-4-stilbenecarboxylate) leads to a redox reaction with formation of Co2+ as has been shown previously. The TSC-ligand is oxidized to the radical in the primary photoreaction. At higher complex concentrations (～10-2 M) this TSC radical is oxidized to stable products (Φ = 0.09 ± 0.02) by [Co(NH3)5TSC]2+,which is reduced to Co2+ leading to release of the TSC- ligand (Φ = 0.07 ± 0.02). Co2+ is thus formed by both the secondary and the primary photo chemical reaction (Φ overall = 0.16). At low complex concentrations (< 10-4 M) in the presence of air, the primary TSC radical is scavenged by O2. Benz-aldehyde is an oxidation product. This reduces the formation of Co2+ to Φ = 0.09 ± 0.02, which is taken to be the efficiency of the primary photo chemical step. It is suggested that the photoredox reaction is initiated by an electron transfer from the first excited singlet of the TSC- ligand. As shown by sensitization experiments, the population of the lowest TSC-triplet leads to the usual trans/cis isomerization of the TSC-ligand, but not to the redox reaction.

Surface concentrations for a mixed transfer process at an expanding spherical electrode

1966 ◽  
Vol 19 (6) ◽  
pp. 923 ◽  
Author(s):  
CM Gorden ◽  
RF Matlak
Keyword(s):  
Electron Transfer ◽  
Chemical Reaction ◽  
Transfer Process ◽  
Transfer Reaction ◽  
Electron Transfer Reaction ◽  
Spherical Electrode ◽  
Reversible Electron Transfer ◽  
Irreversible Chemical Reaction

An expression has been derived for the concentration of oxidant and reductant at the surface of an expanding spherical electrode as a function of time and the polarizing potential in the case where a slow irreversible chemical reaction follows a reversible electron transfer reaction under the conditions of a somewhat idealized polarographic system.

Separation of Electron-Transfer and Coupled Chemical Reaction Components of Biocatalytic Processes Using Fourier Transform ac Voltammetry

2005 ◽  
Vol 77 (11) ◽  
pp. 3502-3510 ◽  
Author(s):  
Barry D. Fleming ◽  
Jie Zhang ◽  
Alan M. Bond ◽  
Stephen G. Bell ◽  
Luet-Lok Wong
Keyword(s):  
Electron Transfer ◽  
Fourier Transform ◽  
Chemical Reaction ◽  
Ac Voltammetry ◽  
Fourier Transform Ac Voltammetry
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