Peer-Reviewed Journal Details
Mandatory Fields
Conghaile, PO,Poller, S,MacAodha, D,Schuhmann, W,Leech, D
2013
May
Biosensors & Bioelectronics
Coupling osmium complexes to epoxy-functionalised polymers to provide mediated enzyme electrodes for glucose oxidation
Published
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Optional Fields
Biofuel cell Os-complex modified polymers Bioelectrocatalysis Glucose oxidase FAD-dependent glucose dehydrogenase GLASSY-CARBON ELECTRODES BIOFUEL CELLS REDOX POLYMER FUEL-CELL ALDOSE DEHYDROGENASE OS-COMPLEX NANOTUBES FILMS BIOSENSORS REDUCTION
43
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Newly synthesised osmium complex-modified redox polymers were tested for potential application as mediators in glucose oxidising enzyme electrodes for application to biosensors or biofuel cells. Coupling of osmium complexes containing amine functional groups to epoxy-functionalised polymers of variable composition provides a range of redox polymers with variation possible in redox potential and physicochemical properties. Properties of the redox polymers as mediators for glucose oxidation were investigated by co-immobilisation onto graphite with glucose oxidase or FAD-dependent glucose dehydrogenase using a range of crosslinkers and in the presence and absence of multiwalled carbon nanotubes. Electrodes prepared by immobilising [P20-Os(2,2'-bipyridine)(2)(4-aminomethyl-pyridine)Cl].PF6, carbon nanotubes and glucose oxidase exhibit glucose oxidation current densities as high as 560 mu A cm(-2) for PBS containing 100 mM glucose at 0.45 V vs. Ag/AgCl. Films prepared by crosslinking [P20-Os(4,4'-dimethoxy-2,2'-bipyridine)(2)(4-aminomethylpyridine)Cl].PF6, an FAD-dependent glucose dehydrogenase, and carbon nanotubes achieve current densities of 215 mu A cm(-2) in 5 mM glucose at 0.2 V vs. Ag/AgCl, showing some promise for application to glucose oxidising biosensors or biofuel cells. (c) 2012 Elsevier B.V. All rights reserved.
DOI 10.1016/j.bios.2012.11.036
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