Electrochemical Quartz Crystal Microbalance and Simplex Optimization Study of Ruthenium-Based Films of 5-amino-1,10-Phenanthroline
Dr. Kenneth Brown
Ruthenium-based polymer films of 5-amino-1,10-phenanthroline, a potential redox mediator, were prepared and characterized on the gold electrode surface of the quartz crystal in the Electrochemical Quartz Crystal Microbalance (EQCM) instrument. The ruthenium compound was dissolved in acetonitrile with tetraethyl ammonium perchlorate (TEAP). The mass change of the electrode during characterization was evaluated, showing that the solvated perchlorate anion is most likely involved in maintaining charge electroneutrality when the film undergoes a change in redox state. The mass polymerized was also studied under different electropolymerization parameters, and it was noted that significantly more mass was immobilized on the first cycle of cyclic voltammetry. The concentration of the ruthenium compound, scan rate, and number of cycles during polymerization via cyclic voltammetry onto a glassy carbon electrode were optimized with simplex optimization.
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