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| - Effect of Quaternization of the Glucose Oxidase “Wiring” Redox Polymer on the MaximumCurrent Densities of Glucose Electrodes
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| - Redox polymers based on the poly(vinylpyridine) complex of[Os(bpy)2Cl]+/2+ were quaternizedwith methyliodide, and the quaternized polymers were used to “wire” glucoseoxidase. Quaternization enhanced boththe rate of electron transport in cross-linked redox hydrogelscontaining glucose oxidase and the strength ofthe electrostatic complex formed between the polycationic redox polymerand the polyanionic glucose oxidase.Quaternization with methyl groups also decreased the number ofpyridine rings available for cross-linking bythe water soluble cross-linker poly(ethylene glycol) diglycidylether. The current densities of glucoseelectrooxidation increased with the degree of quaternization of the“wires” until one-third of the pyridinerings were quaternized, and the activation energies decreased untilone-half of the rings were quaternized.
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