Styrene Oxidation by Copper(II) Complexes Salen-Type Encapsulated into Nay Zeolite

The copper(II) complex with a Schiff-base salen-type ligand has been encapsulated in the nanopores of a NaY zeolite by using two different methodologies, the flexible ligand and in situ complex preparation methods. The encapsulated and non-encapsulated copper(II) complexes were screened as catalysts...

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Bibliographic Details
Published in:Archives of metallurgy and materials 2013-12, Vol.58 (4), p.1291-1294
Main Authors: Kuźniarska-Biernacka, I., Carvalho, M.A., Neves, I. Correia, Fonseca, A. M., Lisińska-Czekaj, A., Czekaj, D.
Format: Article
Language:English
Subjects:
Benzaldehyde
Catalysis
CATALYSTS
COPPER COMPOUNDS
Copper(II) complexes
ENCAPSULATION
LIGANDS
NaY zeolite
Oxidation
POLYSTYRENE
Schiff base
Styrenes
Zeolites
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Summary:The copper(II) complex with a Schiff-base salen-type ligand has been encapsulated in the nanopores of a NaY zeolite by using two different methodologies, the flexible ligand and in situ complex preparation methods. The encapsulated and non-encapsulated copper(II) complexes were screened as catalysts for styrene oxidation by using TBHP as the oxygen source in acetonitrile solvent. Under the optimized conditions, the catalysts exhibited moderate activity with higher selectivity to benzaldehyde. Both heterogeneous catalysts were found to be reusable after the catalytic cycle, but with some loss of activity Osadzenie kompleksu miedzi(II) z zasadą Schitta typu salen na zeolicie typu NaY zostało prze powadzone za pomocą dwóch metod „flexible ligand" i „in situ”. Katalityczne właściwości otrzymanego kompleksu oraz jego heterogenizowanych analogów badano w reakcji utleniania styrenu w obecności TBHP. Jako rozpuszczalnik stosowano acetonitryl. Testowane katalizatory wykazują średnią aktywność katalityczną z tendencją wytwarzania aldehy du benzoesowego. Oba heterogenizowane katalizatory mogą być wykorzystywane ponownie bez utraty aktywności katalitycznych.
ISSN:1733-3490
2300-1909
DOI:10.2478/amm-2013-0160