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Electrochemistry and Ion Sensing Properties of Conducting Hydrogel Layers Based on Polypyrrole and Alkoxysulfonated Poly(3,4‐ethylenedioxythiophene) (PEDOT‐S) |
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| Authors: | Marek Sobkowiak Tomasz Sokalski Andrzej Lewenstam Roger Gabrielsson Olle Inganäs Grzegorz Milczarek |
| Institution: | 1. Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, Piotrowo 3, 60‐965 Poznan, Poland tel: +48?61?665?3015;2. fax: +48?61?665?2571;3. Process Chemistry Centre, c/o Centre for Process Analytical Chemistry and Sensor Technology (ProSens), ?bo Akademi University, Biskopsgatan 8, 20500 ?bo‐Turku, Finland;4. Organic Chemistry, IFM, Link?ping University, S‐581?83 Link?ping, Sweden;5. Biomolecular and Organic Electronics, IFM, Link?ping University, S‐581 83 Link?ping, Sweden |
| Abstract: | Acidic aqueous solutions containing pyrrole and alkoxysulfonated PEDOT derivative (PEDOT‐S) were found to undergo polymerization in the absence of an external oxidizing agent. The product was a nearly black‐colored conducting hydrogel that after separation could be dispersed in water or acetone. The suspensions could be used to deposit cast films on a polycrystalline gold electrode. The polymer modified electrode showed a nearly Nernstian potentiometric response to Ag+ cations in the concentration range of 10?5–10?1 M with the slope of 54 mV/decade. The response was specific to Ag+ compared to a series of alkali and transition‐metal cations (pKAg/M>3.7). |
| Keywords: | Polypyrrole Ion selective electrodes PEDOT‐S Autopolymerization |