Evidence of coordinative chain transfer ...
Type de document :
Article dans une revue scientifique: Article original
DOI :
URL permanente :
Titre :
Evidence of coordinative chain transfer polymerization of isoprene using iron iminopyridine/ZnEt <sub>2</sub> catalytic systems
Auteur(s) :
Hashmi, Obaid-Hasan [Auteur]
Unité de Catalyse et de Chimie du Solide (UCCS) - UMR 8181
Visseaux, Marc [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Champouret, Yohan [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Unité de Catalyse et de Chimie du Solide (UCCS) - UMR 8181
Visseaux, Marc [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Champouret, Yohan [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Titre de la revue :
Polymer Chemistry
Nom court de la revue :
Polym. Chem.
Numéro :
12
Pagination :
4626-4631
Date de publication :
2021
ISSN :
1759-9954, 1759-9962
Discipline(s) HAL :
Chimie/Chimie de coordination
Résumé en anglais : [en]
Isoprene polymerization using iminopyridine-supported iron complexes combined with Al i Bu3/[B(C6F5)4][CPh3] was carried out in the presence of ZnEt2 as chain transfer agent (CTA). Detailed studies revealed that the Mn of ...
Lire la suite >Isoprene polymerization using iminopyridine-supported iron complexes combined with Al i Bu3/[B(C6F5)4][CPh3] was carried out in the presence of ZnEt2 as chain transfer agent (CTA). Detailed studies revealed that the Mn of the resulting polyisoprenes and the rate of polymerization decrease steadily as the amount of CTA increases while preserving the catalyst selectivity. These results highlight the first example of a reversible iron-mediated chain transfer polymerization of isoprene. a Polymerization conditions: 10 µmol of Fe(II) complex, isoprene/Fe/Al i Bu3/[Ph3C][B(C6F5)4] = 2 000/1/3/1, toluene = 20 mL, [C]isoprene = 1 mol/L, temperature = 25 °C. b Determined by size exclusion chromatography (SEC) analysis in THF using polystyrene standards, N chains = Mn(exp) without CTA/Mn(exp) with CTA. c Determined by 1 H NMR and 13 C NMR. d Isoprene/Fe/Al i Bu3/[B(C6F5)4][CPh3] = 500/1/3/1.Lire moins >
Lire la suite >Isoprene polymerization using iminopyridine-supported iron complexes combined with Al i Bu3/[B(C6F5)4][CPh3] was carried out in the presence of ZnEt2 as chain transfer agent (CTA). Detailed studies revealed that the Mn of the resulting polyisoprenes and the rate of polymerization decrease steadily as the amount of CTA increases while preserving the catalyst selectivity. These results highlight the first example of a reversible iron-mediated chain transfer polymerization of isoprene. a Polymerization conditions: 10 µmol of Fe(II) complex, isoprene/Fe/Al i Bu3/[Ph3C][B(C6F5)4] = 2 000/1/3/1, toluene = 20 mL, [C]isoprene = 1 mol/L, temperature = 25 °C. b Determined by size exclusion chromatography (SEC) analysis in THF using polystyrene standards, N chains = Mn(exp) without CTA/Mn(exp) with CTA. c Determined by 1 H NMR and 13 C NMR. d Isoprene/Fe/Al i Bu3/[B(C6F5)4][CPh3] = 500/1/3/1.Lire moins >
Langue :
Anglais
Audience :
Non spécifiée
Vulgarisation :
Non
Établissement(s) :
CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Collections :
Équipe(s) de recherche :
Méthodologie organométallique pour la catalyse homogène (MOCAH)
Date de dépôt :
2022-03-24T09:02:36Z
2024-01-15T16:09:20Z
2024-01-15T16:09:20Z
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