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Amperometric enzyme-modified electrodes based on tetrathiafulvalene derivatives for the determination of glucose

✍ Scribed by H. S. Lee; L.-F. Liu; P. D. Hale; Y. Okamoto

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
586 KB
Volume
3
Category
Article
ISSN
1042-7163

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✦ Synopsis

A number of tetrathiafulvalene (TTF) derivatives have been synthesized and tested as electron transfer niediators i n glucose oxidase-based amperornetric biosensors. Using cyclic voltanzmetry and stationary potential experiments, it is shown that several of these derivatives can effectively mediate electron transfer from the reduced flavin adenine dinucleotide redox centers of glucose oxidase to a conventional carbon paste electrode. An insoluble polymeric electron relay system, based on the covalent attachment of TTF inoieties to a highly flexible siloxane polymer, is also shown to facilitate a flow of electrons from the enzyme to the electrode. The resulting glucose biosensors function efficiently over a clinically relevant range of glucose concentrations

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