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Optimization of oxidant for polymerization of indole in water-ethanol medium

SYSNO ASEP	0549758
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Optimization of oxidant for polymerization of indole in water-ethanol medium
Tvůrce(i)	Milakin, Konstantin A. (UMCH-V)_RID Morávková, Zuzana (UMCH-V)_{RID, ORCID} Konefal, Rafal (UMCH-V)_{RID, ORCID} Gupta, Sonal (UMCH-V)_{RID, ORCID} Acharya, Udit (UMCH-V)_{RID, ORCID} Walterová, Zuzana (UMCH-V) Bober, Patrycja (UMCH-V)_{RID, ORCID, SAI}
Číslo článku	124447
Zdroj.dok.	Polymer. - : Elsevier - ISSN 0032-3861 Roč. 239, 17 January (2022)
Poč.str.	11 s.
Jazyk dok.	eng - angličtina
Země vyd.	GB - Velká Británie
Klíč. slova	polyindole ; polymerization ; oxidant
Vědní obor RIV	CD - Makromolekulární chemie
Obor OECD	Polymer science
CEP	GA21-01401S GA ČR - Grantová agentura ČR
Způsob publikování	Omezený přístup
Institucionální podpora	UMCH-V - RVO:61389013
UT WOS	000783136000002
EID SCOPUS	85121104949
DOI	10.1016/j.polymer.2021.124447
Anotace	Influence of oxidant nature and monomer:oxidant ratio was studied systematically for finding optimal conditions for indole polymerization in water-ethanol medium. Conventional oxidizing agents applied for the preparation of conducting polymers, such as iron (III) chloride, iron (III) nitrate, cerium (IV) sulfate and ammonium peroxydisulfate, were used for the optimization. For the oxidant electrons:monomer ratio = 2.5, all studied oxidants resulted in successful conversion of monomer to polyindole, which was confirmed by ultraviolet–visible spectroscopy, MALDI TOF spectrometry, NMR and infrared spectroscopy. The NMR spectroscopy confirmed 2,3-coupling of units in polyindole chains. According to the infrared spectroscopy, using iron (III) nitrate, compared to other oxidants, resulted in the product with the least amount of carbonyl groups connected with oxidative degradation of polyindole, which correlated with the highest conductivity (1.5 × 10−7 S cm−1) and thermal stability of the material. Optimization of the oxidant:monomer ratio performed with iron (III) nitrate as an oxidizing agent showed that the ratio = 1 led to the product with the lowest yield but allowed further decrease of the carbonyl content in polyindole molecular structure, while showing enhancement of the material electroactivity, thermal stability and conductivity up to 1.2 × 10−5 S cm−1. The prepared materials can be potentially used in electrorheology.
Pracoviště	Ústav makromolekulární chemie
Kontakt	Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358
Rok sběru	2023
Elektronická adresa	https://www.sciencedirect.com/science/article/pii/S0032386121010703?via%3Dihub

Počet záznamů: 1