Issue 5, 2013

Zirconium and hafnium complexes based on 2-aryl-8-arylaminoquinoline ligands: synthesis, molecular structure, and catalytic performance in ethylene copolymerization

Abstract

A general and efficient approach toward new zirconium and hafnium complexes based on 2-aryl-8-arylaminoquinoline ligands was developed. These precursors, when activated with MAO/borate cocatalyst and supported on silica, result in active olefin polymerization catalysts. The ethylene copolymers produced under industrially relevant conditions show very high molecular weights and unique microstructures defined by the multisite nature of the catalyst. A site-diversification mechanism is proposed to explain the presence of at least five individual sites, as deduced from 3D-TREF analysis of ethylenebutene copolymers.

Graphical abstract: Zirconium and hafnium complexes based on 2-aryl-8-arylaminoquinoline ligands: synthesis, molecular structure, and catalytic performance in ethylene copolymerization

Supplementary files

Article information

Article type
Paper
Submitted
14 Aug 2012
Accepted
26 Sep 2012
First published
04 Oct 2012

Dalton Trans., 2013,42, 1501-1511

Zirconium and hafnium complexes based on 2-aryl-8-arylaminoquinoline ligands: synthesis, molecular structure, and catalytic performance in ethylene copolymerization

I. E. Nifant'ev, P. V. Ivchenko, V. V. Bagrov, S. M. Nagy, L. N. Winslow, J. A. Merrick-Mack, S. Mihan and A. V. Churakov, Dalton Trans., 2013, 42, 1501 DOI: 10.1039/C2DT31856C

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