Heterogeneous complexes of nickel MCM-41 with β-diimine ligands: applications in olefin oligomerization

Autor:	Roberto F. de Souza, Enéderson Rossetto, Bruna Pes Nicola, Katia Bernardo-Gusmão, Sibele B. C. Pergher
Jazyk:	angličtina
Rok vydání:	2015
Předmět:	Thermogravimetric analysis Olefin fiber Ethylene Ligand chemistry.chemical_element Photochemistry MCM-41 Catalysis chemistry.chemical_compound Nickel Nickel complex β-diimine chemistry Polymer chemistry Oligomerization Physical and Theoretical Chemistry Mesoporous material Diimine
Zdroj:	Repositório Institucional da UFRN Universidade Federal do Rio Grande do Norte (UFRN) instacron:UFRN
Popis:	The β-diimine ligands 2-(phenyl)amine-4-(phenyl)imine-2-pentene and 2-(2,6-dimethylphenyl)amine-4-(2,6-dimethylphenyl)imine-2-pentene were combined with the alkoxysilane group chloropropyltrimethoxysilane (CPTMS) and covalently anchored to a mesoporous MCM-41 support; they were ordered via interactions with the silanols of the silica matrix and complexed with nickel. The complexes were synthesized for use in ethylene and propylene oligomerization and for comparing the results of homogeneous and heterogeneous systems. The support was first synthesized, calcined, anchored to the ligand, and then, complexed with nickel. These materials were characterized using various techniques, such as 1H, 13C, and 29Si NMR, small angle XRD, thermogravimetric analysis, adsorption isotherms, transmission electron microscopy, and flame atomic absorption spectroscopy, to confirm the success of the synthesis. Both homogeneous and heterogeneous complexes are active and selective for the reactions of ethylene and propylene oligomerization.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7873fbfa2721326405bd80e70262e6a2 https://repositorio.ufrn.br/jspui/handle/123456789/29638 Zobrazit plný text záznamu