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| The electrochemical characterization of two different tetraalylsilane dendrimers functionalized with ferrocenyl units electronically communicated has been carried out both in solution and electrochemically deposited onto platinum electrodes. The kinetics and electrocatalytical properties of electrodes modified with these dendrimers in the hydrogen peroxide oxidation and reduction have been investigated as a function of the structure of the dendrimers (length of their branches). Also the analytical properties of electrodes modified with these dendrimers as sensors of hydrogen peroxide are described. In addition, several aerobic glucose and lactate biosensors and anaerobic glucose biosensor have been developed by immobilizing glucose oxidase and lactate oxidase by cross-linking and electrostatic interaction procedures respectively. The kinetics, bioelectrocatalytic efficiency and analytical properties of biosensors are described. The results confirm that electrodes modified with the examined dendrimers act as efficient redox mediators for both electrocatalytic oxidation and reduction of hydrogen peroxide and as bioelectrocatalysts and mediators of the enzyme reactions. The redox dendrimers co-immobilized with glucose-oxidase or lactate oxidase have been successfully used as amperometric biosensors for glucose or lactate determinations respectively. As expected these compounds allow getting high sensitivity and low detection limits using low working potentials. | |
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2nd International Symposium on Biological applications of Dendrimers |
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960 |
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