Electrosynthesis of poly-o-diaminobenzene on the Prussian Blue modified electrodes for improvement of hydrogen peroxide transducer characteristics.
Electropolymerisation of nonconducting polymer, poly-(1,2-diaminobenzene) on the top of Prussian Blue (PB) modified electrode led to significant improvement of resulting hydrogen peroxide transducer selectivity and operational stability. The reported transducer retained 100% of response during 20 h under the continuous flow of 0.1 mM H(2)O(2), and thus improves the stability level in selective peroxide detection by one order of magnitude. The selectivity value of the PB-poly(1,2-DAB) based H(2)O(2) sensor in relation to ascorbate is approximately 600. No signals to acetaminophen and urate were investigated. PB-poly(1,2-diaminobenzene) modified electrode allows the detection of H(2)O(2) in the flow-injection mode down to 10(-7) M with the sensitivity 0.3 A M(-1) cm(-2), which is only two times lower compared to the uncovered PB based transducer.
Lukachova
Lilia V
LV
Faculty of Chemistry, M.V. Lomonosov Moscow State University, 119899 Moscow, Russia. lukachova@enzyme.chem.msu.ru
Kotel'nikova
Elena A
EA
D'Ottavi
Daniele
D
Shkerin
Egor A
EA
Karyakina
Elena E
EE
Moscone
Danila
D
Palleschi
Giuseppe
G
Curulli
Antonella
A
Karyakin
Arkady A
AA
D004566:Electrodes; D005295:Ferrocyanides / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D010655:Phenylenediamines / Q000138:chemical synthesis*
D005295:Ferrocyanides; D010655:Phenylenediamines; C453960:poly-(1,2-diaminobenzene); D006861:Hydrogen Peroxide; C000170:ferric ferrocyanide