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Voltammetric Techniques: Cyclic Voltammetry

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Cyclic voltammetry of auranofin.

A A Mohamed¹, A E Bruce, M R Bruce

¹Department of Chemistry University of Maine Orono Maine 04469-5706 USA.

Metal-Based Drugs

|May 14, 2008

Summary

This summary is machine-generated.

The oxidative behavior of Auranofin was studied using cyclic voltammetry. Two irreversible oxidation processes were observed, indicating sensitivity to electrode adsorption and electrolyte composition.

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Area of Science:

Electrochemistry
Organometallic Chemistry
Pharmacology

Background:

Auranofin is a gold-containing drug used to treat rheumatoid arthritis.
Understanding its oxidative behavior is crucial for its application and stability.
Gold complexes exhibit diverse electrochemical properties.

Purpose of the Study:

To investigate the electrochemical oxidative behavior of Auranofin.
To determine the oxidation potentials and mechanisms.
To compare Auranofin's electrochemistry with related gold complexes.

Main Methods:

Cyclic voltammetry (CV) was employed.
Experiments were conducted in dichloromethane with tetrabutylammonium hexafluorophosphate or tetrafluoroborate as supporting electrolytes.
Platinum working electrodes and a silver/silver chloride reference electrode were used.

Main Results:

Two irreversible oxidation processes were identified at +1.1 V and +1.6 V vs. Ag/AgCl.
The electrochemical response was influenced by electrode adsorption and the supporting electrolyte.
Repeated cycling led to product accumulation on the electrode surface.

Conclusions:

Auranofin exhibits distinct oxidative pathways under electrochemical conditions.
Electrode adsorption and electrolyte nature significantly affect its electrochemical response.
Further studies are needed to elucidate the exact nature of the oxidation products.