Effect of iodine solutions on polyaniline films |
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Authors: | MM Ayad J Stejskal |
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Affiliation: | a Department of Chemistry, Faculty of Science, Tanta University, Tanta 31527, Egypt b Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06 Prague 6, Czech Republic |
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Abstract: | Polyaniline (PANI) emeraldine-base films have been exposed to iodine solutions. The interaction between the films and the iodine solution was studied using the quartz-crystal microbalance (QCM) technique and the UV-visible absorption spectroscopy. The iodine-treated film of emeraldine base was subjected to dedoping process using 0.1 M ammonia solution. The resulting film was exposed again to the previously used iodine solution. Iodine was found to play multiple roles: the ring-iodination of PANI film, the oxidation of PANI to pernigraniline base, and iodine doping to PANI salt. A sensor based on PANI-coated electrode of QCM was developed to monitor the presence of iodine in solution. |
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Keywords: | Polyaniline Films Quartz-crystal microbalance Iodine Sensor |
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