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pyrrole ring

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pyrrole ring [′pī‚rōl ‚riŋ]
(organic chemistry)
A five-member heterocycle containing one nitrogen atom and four carbon atoms in the ring; frequently found in structures of natural products occurring as joined rings or attached to straight chains.
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The IR absorption bands for PPy were assigned according to the literature [14, 23, 24], namely the C-C stretching vibrations of the pyrrole ring at 1540 [cm.
Preparation, surface chemistry, and electrical conductivity of novel ... by Micusik, Matej; Omastova, Maria; Boukerma, Kada; Albouy, Aurelie; Chehimi, Mohamed M.; Trchova, Miro / Polymer Engineering and Science
It is known that during pyrrole polymerization for three or four pyrrole rings in the polymer chain, one positive charge is created, which has to be compensated by the anion of the oxidant.
Conductive polypropylene/clay/polypyrrole nanocomposites by Omastova, Maria; Mravcakova, Miroslava; Chodak, Ivan; Pionteck, Jurgen; Haussler, Liane / Polymer Engineering and Science
Partial oxidation of the polymer produces positive charges on some of the pyrrole rings that generate polarons and bipolarons, and the charge is balanced by an anion from the electrolyte to maintain neutrality of the polymer.
Conductive polymer blends prepared by in situ polymerization of ... by De Jesus, M.C.; Fu, Y.; Weiss, R.A. / Polymer Engineering and Science
 
 
 
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