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A pH Responsive Redox Hydrogel for Electrochemical Detection of Redox Silent Biocatalytic Processes. Control of Hydrogel Solvation

  • The control of bioelectrocatalytic processes by external stimuli for the indirect detection of non-redox active species was achieved using an esterase and a redox enzyme both integrated within a redox hydrogel. The poly( vinyl) imidazole Os(bpy)(2)Cl hydrogel displays pH-responsive properties. The esterase catalysed reaction leads to a local pH decrease causing protonation of imidazole moieties thus increasing hydrogel solvation and mobility of the tethered Os-complexes. This is the key step to enable improved electron transfer between an aldehyde oxidoreductase and the polymer-bound Os-complexes. The off-on switch is further integrated in a biofuel cell system for self-powered signal generation.

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Author:Andrea Contin, Stefano Frasca, Jeevanthi Vivekananthan, Silke Leimkühler, Ursula WollenbergerORCiDGND, Nicolas Plumere, Wolfgang Schuhmann
ISSN:1040-0397 (print)
ISSN:1521-4109 (online)
Parent Title (English):Electroanalysis : an international journal devoted to fundamental and practical aspects of electroanalysis
Place of publication:Weinheim
Document Type:Article
Year of first Publication:2015
Year of Completion:2015
Release Date:2017/03/27
Tag:Biofuel cell; External stimuli; Self-powered biosensor; Solvation; pH responsive hydrogel
First Page:938
Last Page:944
Funder:Cluster of Excellence RESOLV - Deutsche Forschungsgemeinschaft (DFG) [EXC 1069]; Unicat - Deutsche Forschungsgemeinschaft (DFG) [EXC 314/2]; Bundesministerium fur Bildung und Forschung (BMBF) within the Project Taschentuchlabor [03IS2201B, 03IS2201F]
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Biochemie und Biologie
Peer Review:Referiert