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090			_aB-18675
245	1	0	_aConducting polypyrrole and polypyrrole/manganese dioxide composites prepared with a solid sacrificial oxidant of pyrrole.
490	0		_vSynthetic Metals, 278, p.116807, 2021
520	3		_aPolypyrrole 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.
650	1	4	_aCONDUCTING POLYMER
650	1	4	_aPOLYPYRROLE
650	1	4	_aMANGANESE DIOXIDE
650	1	4	_aMNO2
650	1	4	_aORGANIC DYES
700	1	2	_aSapurina, I.
700	1	2	_aBubulinca, C.
700	1	2	_aTrchová, M.
700	1	2	_aProkes, J.
700	1	2	_aStejskal, J.
856	4	0	_uhttps://drive.google.com/file/d/11JPk2YRyqIZMc0eFGOwDAhPaxG9StQGR/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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