Fabrication of Thionin-Toluene Diisocyanate Modified Electrode and Its Electrocatalytic Oxidation to NADH

Chemical Research in Chinese Universities ›› 1996, Vol. 12 ›› Issue (3): 245-252.

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Fabrication of Thionin-Toluene Diisocyanate Modified Electrode and Its Electrocatalytic Oxidation to NADH

YU Ai-min, HAN Ji-lin, YANG Ke-sheng, ZHANG Hai-lin, CHEN Hong-yuan

Department of Chemistry, Nanjing University, Nanjing, 210093

Received:1995-10-10 Online:1996-07-15 Published:2011-11-18
Supported by:
Supported by the National Natural Science Foundation of China and the Research Laborary of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry.

Abstract

Abstract: The chemically modified electrode constructed by chemically cross-linking of redox mediator thionin with toluene diisocyanate(TDI) directly at the surface of a spectrographic graphite electrode shows a significant electrocatalytic activity to the oxidation of reduced nicotinamide adenine dinucleotide(NADH) with oxidation overpotential reduced by 310mV.In the potential range from-0.1 to 0.3V,the adsorbed thionin -TDI behaves as a one electron and one proton reversible redox process. The modified electrode achieves a steady-state current of NADH within 20s and the detection limit is about 1.5μm.

Key words: NADH, TN-TDI derivative, Modified electrode, Biosensor, Electrocatalysis

YU Ai-min, HAN Ji-lin, YANG Ke-sheng, ZHANG Hai-lin, CHEN Hong-yuan. Fabrication of Thionin-Toluene Diisocyanate Modified Electrode and Its Electrocatalytic Oxidation to NADH[J]. Chemical Research in Chinese Universities, 1996, 12(3): 245-252.

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Fabrication of Thionin-Toluene Diisocyanate Modified Electrode and Its Electrocatalytic Oxidation to NADH

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