Glassy Carbon Electrode Modified with 4,4ʹʹ-Oxydiphenylene Bisdiazonium Tetrafluoroborate as a Sensitive Voltammetric Sensor for Flavonoids

In the current study, the electrochemical behaviors of 4,4ʹ-oxydianiline and 4,4ʹ- oxydiphenylene bisdiazonium tetrafluoroborate salt on the surface of glassy carbon electrode using voltammetry technique. 1 mM 4,4ʹ-oxydianiline in 100 mM tetrabutylammonium tetrafloroborate (in acetonitrile) has been modified to the electrode surface in 0.0 mV and +1800 mV potential range at 100 mV s-1 scanning rate with 50 cycles. The same solvent has been used for 4,4ʹ-oxydiphenylene bisdiazonium tetrafluoroborate salt. 1 mM prepared 4,4ʹ- oxydiphenylene bisdiazonium tetrafluoroborate salt has been modified to the electrode surface in +100 mV and -1200 mV potential range using 100 mV s-1 scanning rate with 10 cycles. Following the modification and characterization process, the sensitivity of 4,4ʹ-oxydiphenylene bisdiazonium tetrafluoroborate salt modified glassy carbon electrode has been tested against flavones, 3-hydroxyflavone, quercetin, rutin and naringenin. Based on the sensitivity tests, 4,4ʹ-oxydiphenylene bisdiazonium tetrafluoroborate salt modified glassy carbon electrode can be used in the determination of total antioxidant capacity. The further studies will progress through this way. Cyclic voltammetry technique has been utilized for the modification process. Electrochemical impedance spectroscopy and scanning electron microscopy have been used for the characterization process.