0542357 - ÚMCH 2022 RIV CH eng J - Článek v odborném periodiku
Sapurina, I. - Bubulinca, C. - Trchová, M. - Prokeš, J. - Stejskal, Jaroslav
Conducting polypyrrole and polypyrrole/manganese dioxide composites prepared with a solid sacrificial oxidant of pyrrole.
Synthetic Metals. Roč. 278, August (2021), č. článku 116807. ISSN 0379-6779. E-ISSN 0379-6779
Grant CEP: GA ČR(CZ) GA19-04859S
Institucionální podpora: RVO:61389013
Klíčová slova: conducting polymer * polypyrrole * manganese dioxide
Obor OECD: Polymer science
Impakt faktor: 4.000, rok: 2021
Způsob publikování: Omezený přístup
Web výsledku:
https://www.sciencedirect.com/science/article/pii/S0379677921001120?via%3Dihub
DOI: https://doi.org/10.1016/j.synthmet.2021.116807

Polypyrrole was prepared by the oxidation of pyrrole with solid manganese dioxide. The present study concerns the chemistry of this process rather than materials properties of the products. The oxidant alone is insoluble in aqueous medium but the reductive dissolution takes place in the presence of pyrrole. Polypyrrole is the exclusive product below the stoichiometric mole ratio [MnO2]/[pyrrole] = 1.25, and polypyrrole/manganese dioxide composites result at higher ratios. Unlike with iron(III) chloride where protons are generated during the oxidation of pyrrole, with manganese dioxide they are consumed and water is a by-product. The sufficient acidity of the reaction medium is thus needed in order to obtain conducting materials. The presence of organic dyes in the preparation of polypyrrole improved the conductivity. One-dimensional morphology of polypyrrole was observed when methyl orange was introduced to the reaction mixture.

Trvalý link: http://hdl.handle.net/11104/0320010