Ethylene polymerization catalyzed by pyrene-tagged iron complexes: The positive effect of π-conjugation and immobilization on multiwalled carbon nanotubes - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue ChemCatChem Année : 2014

Ethylene polymerization catalyzed by pyrene-tagged iron complexes: The positive effect of π-conjugation and immobilization on multiwalled carbon nanotubes

Résumé

2-[1-(2,6-Diisopropylphenylimino)ethyl]-6-[1-(pyren-1-ylimino)ethyl]pyridine (L1) and 2,6-bis[1-(pyren-1-ylimino)ethyl]pyridine (L2) were synthesized and used to prepare the corresponding Fe complexes Fe1 and Fe2 from FeCl2. All new compounds were characterized, and single-crystal XRD analysis of Fe1 was performed. The π-conjugated pyrenyl substituent enhanced the catalytic activity of the Fe complexes, which display high activity in ethylene polymerization up to 107 gPE molFe−1 h−1 (PE=polyethylene). These Fe complexes were easily immobilized on multiwalled carbon nanotubes (MWCNTs) through noncovalent π–π interactions. The supported precatalysts showed better ethylene polymerization activity than their homogeneous counterparts to produce well-dispersed MWCNT/PE composite materials.

Dates et versions

hal-02023183 , version 1 (18-02-2019)

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Liping Zhang, W. Zhang, Philippe Serp, W.H. Sun, Jérôme J. Durand. Ethylene polymerization catalyzed by pyrene-tagged iron complexes: The positive effect of π-conjugation and immobilization on multiwalled carbon nanotubes. ChemCatChem, 2014, 6 (5), pp.1310-1316. ⟨10.1002/cctc.201301063⟩. ⟨hal-02023183⟩
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