Issue 35, 2020

Activated carbon fibers as a support for nickel diimine complexes and their application in ethylene oligomerization

Abstract

In this work, we demonstrate the synthesis and characterization of a new class of β-diimine ligand combined with the alkoxysilane group CPTMS ((3-chloropropyl)trimethoxysilane), covalently anchored to the surface of activated carbon fibers (ACF) by interaction with the hydroxyl groups of the surface. The nickel β-diimine dibromo (N,N-bis(2,6-diethylphenyl)-2,4-pentanedimine)nickel(II) complex employed in this study has an interesting catalytic activity and selectivity in producing light olefins, when applied in ethylene oligomerization reactions in a homogenous and anchored to the ACF in a heterogeneous medium. The ligand was characterized by 1H NMR, elemental analysis and infrared, while the catalytic precursor was analyzed by infrared and X-ray absorption spectroscopy (XAS), and the activated carbon fibers (ACF) employed as a support of this catalytic precursor were analyzed by SEM, adsorption/desorption of N2, elemental analysis, and FAAS. The catalytic precursor is shown to be active in ethylene oligomerization reactions, with excellent selectivity (above 90%) for α-C4. Tests in the heterogeneous medium of the complexes, anchored to the ACF for ethylene oligomerization, demonstrated also excellent selectivity, above 95%.

Graphical abstract: Activated carbon fibers as a support for nickel diimine complexes and their application in ethylene oligomerization

Supplementary files

Article information

Article type
Paper
Submitted
07 May 2020
Accepted
24 Jul 2020
First published
30 Jul 2020

New J. Chem., 2020,44, 15100-15108

Activated carbon fibers as a support for nickel diimine complexes and their application in ethylene oligomerization

Y. M. Variani, C. W. Lopes, B. P. Nicola, D. M. Meira, S. B. C. Pergher and K. Bernardo-Gusmão, New J. Chem., 2020, 44, 15100 DOI: 10.1039/D0NJ02285C

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