Electrochemical oxidation of ciprofloxacin in two different processes: the electron transfer process on the anode surface and the indirect oxidation process in bulk solutions

2018 ◽  
Vol 20 (6) ◽  
pp. 943-955 ◽  
Author(s):  
Bo Shen ◽  
Xianghua Wen ◽  
Gregory V. Korshin
Keyword(s):  
Electron Transfer ◽  
Transfer Process ◽  
Oxidation Process ◽  
Direct Electron Transfer ◽  
Anode Surface ◽  
Target Compound ◽  
Electron Transfer Process ◽  
Indirect Oxidation ◽  
Electrochemical Processes ◽  
Bulk Solutions

Two typical electrochemical processes, including direct electron transfer and indirect oxidation, were investigated with ciprofloxacin as a target compound.

The effect of substituents on the electrochemical oxidation potentials of 1,1,2,2-tetraphenylcyclopropane and 1,1,3,3-tetraphenylpropenyl radical

1986 ◽  
Vol 64 (1) ◽  
pp. 100-103 ◽  
Author(s):  
Danial D. M. Wayner ◽  
Donald R. Arnold
Keyword(s):  
Electron Transfer ◽  
Transition State ◽  
Transfer Process ◽  
Substituent Effect ◽  
Oxidation Process ◽  
Oxidation Potential ◽  
Slow Electron ◽  
Electron Transfer Process ◽  
Oxidation Potentials ◽  
Multiple Substitution

The effects of multiple substitution by methoxy and cyano in the 4-position(s) of 1,1,2,2-tetraphenylcyclopropane (1) and 1,1,3,3-tetraphenylpropenyl radical (2•) on the oxidation potentials have been measured. The results indicate that the oxidation process for the cyclopropanes (1a–m) is irreversible. Nevertheless, the substituent effect on the potential is essentially additive and correlates reasonably well with Σσ+. A slow electron transfer process (an overall conversion of 1 to 2+), with a transition state resembling the ring-opened radical cation, is consistent with these observations. The oxidation of the radical 2• is quasi-reversible in dichloromethane. In this case also, the substituent effect on the oxidation potential is additive and correlates with Σσ+. Any deviation from planarity of 2• is not sufficient to prevent substituents from exerting normal (additive) behaviour.

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