“Wiring” of glucose oxidase within a hydrogel made with polyvinyl imidazole complexed with [(Os-4,4′-dimethoxy-2,2′-bipyridine)Cl]+/2+1

Abstract Glucose electrodes based on hydrogels made by crosslinking glucose oxidase and the redox polymer formed upon complexing polyvinyl imidazole (PVI) with [Os(dmo-bpy) 2 Cl] +/2+ (dmo-bpy= 4,4′-dimethoxy-2,2′-bipyridine) on vitreous carbon electrode surfaces were investigated. The redox potential of the hydrogels was −69 mV (SCE) and their glucose electrooxidation current reached a plateau at +50 mV (SCE). Urate and acetaminophen were not electrooxidized at this potential at rates that would interfere with the glucose assays. At 32 mM glucose concentration switching of the atmosphere from argon to O 2 reduced the current only by 5%.

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