Microgravimetric Study of Electrochemically Controlled Nucleophilic Addition of Sulfite to Polyaniline
The sulfonation of polyaniline (PANI) films by nucleophilic addition of sulfite ion has been controlled through the polymer oxidation state under electrochemical control. The process was monitored by in situ electrochemical quartz crystal microbalance (EQCM), and the polymer oxidation was accomplish...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_07437463_v20_n6_p2349_Grumelli |
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todo:paper_07437463_v20_n6_p2349_Grumelli2023-10-03T15:38:36Z Microgravimetric Study of Electrochemically Controlled Nucleophilic Addition of Sulfite to Polyaniline Grumelli, D.E. Forzani, E.S. Morales, G.M. Miras, M.C. Barbero, C.A. Calvo, E.J. Nucleophilic addition Quartz crystal microbalances (QCM) Aromatic compounds Electric conductivity Electrochemistry Electrodes Gravimetric analysis Ion exchange Oxidation Reduction Solubility Solutions Sulfonation Aromatic Compounds Electrochemistry Gravimetry Ion Exchange Oxidation Sulfonation The sulfonation of polyaniline (PANI) films by nucleophilic addition of sulfite ion has been controlled through the polymer oxidation state under electrochemical control. The process was monitored by in situ electrochemical quartz crystal microbalance (EQCM), and the polymer oxidation was accomplished by electrode potential steps in sulfite aqueous solutions. The nucleophilic addition of sulfite to PANI only takes place on the oxidized polymer. From the ratio of added mass to the injected charge, the degree of sulfonation has been obtained with a yield as high as 50%. It has been observed that the ion-exchange mechanism during the oxidation-reduction process in the resulting sulfonated polymer is analogous to the polymer produced by electrophilic sulfonation of polyaniline or by copolymerization of aniline with aminosulfonic acids, unlike the ionic exchange observed for unmodified PANI. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_07437463_v20_n6_p2349_Grumelli |
| institution |
Universidad de Buenos Aires |
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I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Nucleophilic addition Quartz crystal microbalances (QCM) Aromatic compounds Electric conductivity Electrochemistry Electrodes Gravimetric analysis Ion exchange Oxidation Reduction Solubility Solutions Sulfonation Aromatic Compounds Electrochemistry Gravimetry Ion Exchange Oxidation Sulfonation |
| spellingShingle |
Nucleophilic addition Quartz crystal microbalances (QCM) Aromatic compounds Electric conductivity Electrochemistry Electrodes Gravimetric analysis Ion exchange Oxidation Reduction Solubility Solutions Sulfonation Aromatic Compounds Electrochemistry Gravimetry Ion Exchange Oxidation Sulfonation Grumelli, D.E. Forzani, E.S. Morales, G.M. Miras, M.C. Barbero, C.A. Calvo, E.J. Microgravimetric Study of Electrochemically Controlled Nucleophilic Addition of Sulfite to Polyaniline |
| topic_facet |
Nucleophilic addition Quartz crystal microbalances (QCM) Aromatic compounds Electric conductivity Electrochemistry Electrodes Gravimetric analysis Ion exchange Oxidation Reduction Solubility Solutions Sulfonation Aromatic Compounds Electrochemistry Gravimetry Ion Exchange Oxidation Sulfonation |
| description |
The sulfonation of polyaniline (PANI) films by nucleophilic addition of sulfite ion has been controlled through the polymer oxidation state under electrochemical control. The process was monitored by in situ electrochemical quartz crystal microbalance (EQCM), and the polymer oxidation was accomplished by electrode potential steps in sulfite aqueous solutions. The nucleophilic addition of sulfite to PANI only takes place on the oxidized polymer. From the ratio of added mass to the injected charge, the degree of sulfonation has been obtained with a yield as high as 50%. It has been observed that the ion-exchange mechanism during the oxidation-reduction process in the resulting sulfonated polymer is analogous to the polymer produced by electrophilic sulfonation of polyaniline or by copolymerization of aniline with aminosulfonic acids, unlike the ionic exchange observed for unmodified PANI. |
| format |
JOUR |
| author |
Grumelli, D.E. Forzani, E.S. Morales, G.M. Miras, M.C. Barbero, C.A. Calvo, E.J. |
| author_facet |
Grumelli, D.E. Forzani, E.S. Morales, G.M. Miras, M.C. Barbero, C.A. Calvo, E.J. |
| author_sort |
Grumelli, D.E. |
| title |
Microgravimetric Study of Electrochemically Controlled Nucleophilic Addition of Sulfite to Polyaniline |
| title_short |
Microgravimetric Study of Electrochemically Controlled Nucleophilic Addition of Sulfite to Polyaniline |
| title_full |
Microgravimetric Study of Electrochemically Controlled Nucleophilic Addition of Sulfite to Polyaniline |
| title_fullStr |
Microgravimetric Study of Electrochemically Controlled Nucleophilic Addition of Sulfite to Polyaniline |
| title_full_unstemmed |
Microgravimetric Study of Electrochemically Controlled Nucleophilic Addition of Sulfite to Polyaniline |
| title_sort |
microgravimetric study of electrochemically controlled nucleophilic addition of sulfite to polyaniline |
| url |
http://hdl.handle.net/20.500.12110/paper_07437463_v20_n6_p2349_Grumelli |
| work_keys_str_mv |
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