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Conducting polypyrrole and polypyrrole/manganese dioxide composites prepared with a solid sacrificial oxidant of pyrrole

SYSNO ASEP	0542357
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Conducting polypyrrole and polypyrrole/manganese dioxide composites prepared with a solid sacrificial oxidant of pyrrole
Author(s)	Sapurina, I. (CZ) Bubulinca, C. (CZ) Trchová, M. (CZ) Prokeš, J. (CZ) Stejskal, Jaroslav (UMCH-V)_{RID, ORCID, SAI}
Article number	116807
Source Title	Synthetic Metals. - : Elsevier - ISSN 0379-6779 Roč. 278, August (2021)
Number of pages	7 s.
Language	eng - English
Country	CH - Switzerland
Keywords	conducting polymer ; polypyrrole ; manganese dioxide
Subject RIV	CD - Macromolecular Chemistry
OECD category	Polymer science
R&D Projects	GA19-04859S GA ČR - Czech Science Foundation (CSF)
Method of publishing	Limited access
Institutional support	UMCH-V - RVO:61389013
UT WOS	000680021100005
EID SCOPUS	85105714751
DOI	10.1016/j.synthmet.2021.116807
Annotation	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.
Workplace	Institute of Macromolecular Chemistry
Contact	Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358
Year of Publishing	2022
Electronic address	https://www.sciencedirect.com/science/article/pii/S0379677921001120?via%3Dihub

Number of the records: 1