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Updated: May 5, 2026
Bacterial Detection & Identification Using Electrochemical Sensors
Published on: April 23, 2013
Detection of ferrocenemethanol and molecular oxygen based on electrogenerated chemiluminescence quenching at a
Tanyu Wang1, Sanjun Fan, Ruby Erdmann
1Department of Chemistry and Biochemistry, Auburn University , Auburn, Alabama 36849-5312, United States.
Abstract:
Small molecules, such as ferrocenemethanol (FcMeOH) and O2, that are capable of quenching the Ru(bpy)3(2+) excited state via energy or electron transfer can be quantitatively detected in a bipolar electrochemical cell based on the attenuation of steady-state electrogenerated chemiluminescence (ECL). FcMeOH quenches ECL generated by the Ru(bpy)3(2+) oxalate coreactant system, exhibiting a linear dependence on [FcMeOH] with a Stern-Volmer slope of 921 M(-1), corresponding to a quenching rate constant of 2 × 10(9) M(-1) s(-1). We used the bipolar ECL quenching platform to measure dissolved O2 and validated the results using a standard Clark electrode. The detection limit for local [O2] measured using ECL quenching was found to be 300 ppb. This work opens up the possibility of utilizing ECL quenching at bipolar electrodes for a wide range of applications.
